Lexicon MPX 100 Dual Channel Processor

it only has knobs. it IS easy to use in THAT respect.

the sounds are "slices" of all that is good about Lexicon. they (the sounds) just aren't editable enough, i think. but for the price,..what can you expect. the MPX500 seems to be a much better choice (if you can afford the extra $200). the Lexicon majesty IS THERE,...it just doesn't have the "usual" personality.

had mine for a few months. it has hiccupped and glitched CONSTANTLY. it drops in and out of effect mode AT WILL. most frustrating. my LXP-1 has NEVER caused me any problems.

fairly friendly people (when you can reach them),...but not very simpathetic to problems.i lost my "proof of purchase" receipt (after a few months of sporadic use) and was told i'd have to cough up big bucks for a fix. i dunno. it doesn't make me feel any better. my Alesis Nanoverb sounds almost as good and has caused me ZERO problems for two years,..AND I OWN several other Lexicon units (and have been quite happy with them)!!! RULES TO REMEMBER:....NEVER LOSE YOUR RECIEPT!!!!!

like i said,...the "grandiose" LEXICON SOUND is there,...but it isn't very "malleable". for $300 bucks,...it's a fairly good deal. unfortunately mine has not worked well at all.

Dead easy to edit but hardly worthwhile, manual is ok. a bit over the top in some places, men`t for a real begginer. Tap tempo button is a real pain, a knob with preselcted times would have been better, like the LXP1. Presets would make most pop people happy.

I find that I cannot get any of the sounds that I whant from this box, the reverb times are not long enough, even though you have an infinite reverb programme, you cannot alter the reverb time on it, only the hi cut! most importantly you cannot alter the pre-delay on the most imprortant reverb programmes, useless. I am involved in Ambient/ experimental music, and sometimes record accoustic instruments so a predelay variation is very imprtant for producing realistic accoustic spaces. I will say that this box is very quiet, but whats the point if it does not deliver the goods sonically.

very reliable.

Not applicable

Lexicon should have concentratd on just puting reverb in this box, get rid of the other rubish, ad some decent control over reverb parrameters, and bingo, a modern day LXP1 in a rack, which is why I brought this thing, But no way is this as good as the LXP1, in the reverb department or ease of control, I am glad I kept my LXP1! OK I know it`s cheap, But a secondhand lxp would be a better bet if you want longer reverb times and long pred-elays, excellent reverbs on a budget, I will be selling minw as soon as possible to buy a PCM70, more money but I think it is the only thing that will replace my LXP1, new is not neccesarely better, oh and I did not like the MPX1 either, bright and thin!

Easy !
Mostly all presets and very limited parameters that can changed. So learning to use this unit is easy.

Lacks digital input !

If you work in the digital domain you need to convert it to analog to get the sound into the MPX 100.

Any conversion introduces some distortion.
Most effects are OK considering they are presets.
I would pay $100 more for a digital input and the ability to enter new effects algorithms. Even if just 1 user algorthm can be put into RAM at once it would be great.

I like to give it a 5 for lack of customization, but considering its low price I ll give it 7.

Its kind of like a Roland (nice presets), but no Kurzweil (very customizable parameters). But then Roland costs a lot less.

You'll never need to grab ur calculator or physics book in design a effects with this module. But then you can probably get 10 of these for the price of a unit that you can design effects on.

Havent had this unit long enough to judge.
Very simple design.
However, I did reset it once on the 2nd day I owned it because it wouldnt start as up properly.
But I have a feeling this thing is gonna out last my Honda.

I usually dont ask for tech support because most in this country is not very good.
I found the web which I do use a lot to be poor.
But the device is so simple I dont think most people will require customer support.

Overly simple for the demanding user. Not for concert or multi media programmers. But then how many of us are ? Good enough for a home recording studio.
The unit can be enhanced tremendously only if there was room for a user algorthm. Just a small amount of RAM dedicated to one or two user effects algorithms. Or a general effects algorithm with most of its parameters changable. But then this would require some sort of software editor on the PC. I doubt for $250 Lexicon is gonna do this.

However, for the price it sounds good. The presets are nod bad and the fact its MIDI controllable is great. Also there is a simple user setting.

Dead easy to get started using it. However, get used to not seeing a
patch number -- there's no display at all. You have to look up the preset descriptions in the manual (luckily, this is easy since it's spiral-bound and all presets are well-catalogued and described) and dial it in. MIDI implementation is _excellent_ -- picks up timecode for delay sync, MIDI patch change, and you can map continuous controllers to the front panel knobs, so you can (for instance) pitch bend in realtime.

I'm using this in a home studio setup for techno/trip-hop/ambient, as an aux send on my mixer, and it sounds beautiful. No noise! I originally bought it only for the delays, but I'm blown away by the quality of the rest of it.

Delays -- top-notch, 5 seconds of mono (2.7 of stereo) delay time, adjustable hi-cut, doesn't muddy up at all.
Reverbs -- plates, chambers, halls, gates, it's all here. For the price, these sound very nice. Not really realistic, but nice nonetheless.
Chorus/Flange -- very pretty but somewhat subtle; don't expect swooshing jet engines.
Rotary -- Well, it doesn't sound like a Leslie, but it sounds very nice on its own merits. Subtle, like the chorus.
Pitch shift -- Not that great, but I've yet to hear a cheap one that was. If you stay out of the extremes and use it for a subtle harmonic doubling, it sounds pretty okay.

I'm still giving this a 10 considering what it cost me.

Dunno, haven't had it that long, but I've had no problems with Lexicon in the past. Given the simplicity of the design I suspect it'd be reliable for gigging (there's not much OS there to crash!)

Dunno.

This is by far the best $200 reverb I've heard, and I didn't even BUY it for reverb, I just wanted a good MIDI sync-able delay. Now I've got that and a lot more.

Aside from having to consult the manual for each variation, this is very easy to use and the manual is also well-written. Another sticking point is the limited ability to edit parameters, but that's why this unit is so inexpensive, and why it comes with so many presets. The knobs are very easy to read, though some may wish this had a readout screen, but come on--these are the corners cut to make the MPX 100 so affordable. Plus you can store your fave presets in the user memory.

For this price, you will not get better. Far better than similarly priced units. As good as the $300-600 units in most regards. I use it in my home studio and am very satisfied. I'm particularly fond of the Ambience effects--way cool, but all the reverbs, delays and tape echos, trems and rotaries, choruses and flanges are excellent. To get better, you will have to spend at least the $800 for the MPX1. The other reviews are NOT correct about the unit being absolutely quiet: it does make some noise! And as far as the pitch shifter sounding bad, I've yet to hear one that sounds good; however, used subtly, the pitch/detune makes for a very nice alternative to the chorus effect. So, excellent sound for the price.

Seems reliable to me.

N/A

There's a lot to love here; very good reverbs, very good choruses, trems and rotaries. I like the fact that you can choose between digital delays (clear feedbacks) and tape echoes ("darker" feedbacks). The ambience effects are a Lexicon signature. Of course better can be had at a much dearer price; for the price, this cannot be beat--unless you need total control over parameters and you need a digital readout screen--but you'll spend about $400 for it, too.

It's easy to use once you read the manual. I'm extremely picky so it takes me a long while to dial in a great sound. Editing is a breeze, no rocket scientry here. The manual gets a 10! Really nice manual.

Gibson LP w/modified p90's, Sovtek mig100h. This is the part where I disagree with everyone else's reviews- NOISE. Once the unit is hooked up and turned on, you can hit the bypass button and there isn't a noticable difference in noise (nice trick Lexicon), which is why I think everyone else is saying this unit is DEAT QUIET. Not so, if you compare the noise level between having it hooked up and not having it hooked up and turned on at all, it is WAY noisier! Especially if you play with a lot of gain on your amp like I do. And of course effects like flange and other extreme effects make more noise than others. I'm picky with any effects and usually don't run anything because I can't deal with the added noise. My SOVTEK is extremely quiet and I don't want to screw that up. As for the quality of the effects I think the rotary speaker simulater is cool! The pitch shifter would also be cool if it would track perfect but it doesn't. The reverb is ok, but I wouldn't say it's great, it sounds kind of brittle to me. One cool thing is how easy the tap tempo on the delay is to set, all you do is hit the button twice to the tempo of the song and it's set! That is cool as hell! No screwing with knobs on that one. I'm sure you could get a lot of sounds of various artists but I don't have time nor do I care about it, I'm more concerned with my own sound. Best effect: Rotary and Delay. Worst effect: Pitch and Detune. I knocked off a massive 3 points for noise (remember I'm picky) and 2 for sound quality. Why can't anyone make a cheap noise free processor?

Seems really reliable.

No problems yet.

I just don't think that this unit is that great and it's definately not dead quiet unless you're playing with really low gain. I wouldn't say it's any worse than other processors in this price range though! This thing was supposed to be so quiet but it's not. If you don't mind noise, buy it, but I wouldn't!

Nothing beats two rotary knobs for ease of use. It's a no brainer. Although, to get to the deeper settings (like MIDI stuff) you will need the manual or the included cheat sheet. Again, because it's only two knobs and a few buttons.

I wanted to use it in a recording / project / home studio to process vocal, drums and synth tracks. The unit is clean sounding (no noise at all) in practically all presets.
The reverbs don't have any side effects like ringing except for when you use a snare sound (you could get a little ringing) but it is still better than anything else in this category. The tails are quite smooth.
But . . . . The reverb is nothing like I expected. Don't take me wrong. I think it is excellent for $200. But it doesn't have that realism other units have. Doesnt make you feel like you are really there. But then again, the only units I've heard can do that are the MPX - 1, PCM 80, 90 and the TC M2000, and 3000. All of which are in a higher price bracket.
I'd say the reberbs sound comparable to a Midiverb 4, but a little better. Definately, the Alesis Wedge has better reverbs.
I was let to believe by a Guitar Center salesperson that the unit would sound as good as any Lexicon processor because it "had the same lexichip"
That is not true. The unit has a "new version" of the chip (which is to me a lower grade version). The bottom line is that higher end Lexicon reverbs sound better.
I returned the unit and bought an MPX 1. The MPX one is what I was really looking for. Please don't buy this unit if you are looking to get into the next level of reverbs. If it is your first one, it will blow you away.

It looks solid, but the power supply is a wall wart. Nothing wrong with that, but you should know, in case that's an inconvenience.
I returned it so I don't know about long term. But I would trust the MPX 100 to last forever judging from the way it's built.

don't know . . . can't say. Hope I never have to deal with them.

I play a jazzy type of industrial/ambient. I demand the very best reverb and I wanted to have the ultimate.
The MPX 100 didn't live up to my high expectations, but I know it is the best reverb you can currently get in the price range, so if you are in a budget, go for it. Just don't believe if someone tells you it sounds as good as any other Lexicon reverb. If you are looking for the "lexicon sound" you won't find anything special here. But you will in the MPX 1 and up . . .
The 9 Rating in this category takes into account the low price of the unit. I am ommiting my personal high expectations to be fair.

This unit is, by far, the easiest effects unit that I've ever used and I have worked with Eventides, Alesis Quadraverb and Korg effects units. The manual is easy enough for a third grader to comprehend. I like the notebook "spiral style" of the manual. I wish everybody would set up their manuals in that fashion.

This unit is DEAD QUIET and sounds amazing!!! I use this thing through my mixer's effects sends and returns, my guitar rig and my bass rig. I run it through my effects loop on my guitar amp. I run my bass guitar direct through it's input and then out to the bass amp. I have to set the input and output volumes different when using the bass setup. My basses are active and I have to roll back the input volume in order to prevent clipping. I crank the output to ten and use a low 3-4 setting for the input....... this thing sounds incredible on bass guitars........ I knew it would sound good on guitars and the mixer sends / returns...... I was skeptical about the bass, but the Lexicon has passed the test with flying colors. For guitar..... all effects sound great from the room sounds, chorus, flanging, detuning to delays, echos, tremolos (leslies), pitch. I even like to experiment with the Special FX........these are really cool. I can get some outlandish shit with these settings. All effects sound thick and full. I love the mix control. I can get the "perfect" sound in seconds with this unit and it doesn't matter what I'm using it for. When I run it through my mixer...... I get outstanding room sounds for drums and vocals. I use the Studio A room sound for most of my drum tracks....... transparent and realistic. I would recommend this to any home studio / musician guru, like myself, who is on a budget. This thing sounds much better than units with a larger price tag......no bullshit!!!

I have owned this thing for about a year now. This thing is rock solid and will last for many years.

Never dealt with Lexicon. Probably never will.

Before I praise the hell out this unit even more, I will list my gripes: I don't like the wall wart. And I don't like the fact that it doesn't have a power switch..... other than that...... this unit KICKS TOTAL ASS!!!!! It is VERSATILE, INEXPENSIVE and SOUNDS GREAT on any application. I like to spend more time being creative and writing music. The MPX-100 allows me to play guitar and bass and be happy instead of scrolling through endless (pointless) parameters in order to get a good sound. For recording, I know exactly where to go in order to get a good room sound. Bottom line: More creative time..... less wasted time. For the money, nobody comes close. Get the Lexicon MPX-100.

The unit sound good as soon as you turn it on. It has seven knobs and NO DISPLAY, but it's OK once you got used to it. There are not really many parameter to tweak with, but the ADJUST-knob always as a crucial parameter assigned to it, so you can edit a patch in a simple but effective way. The Manual is most useful for the description of the presets, because it is important to know which value is being adjusted by ADJUST in the given preset. System and MIDI configs are a bit nasty because of the missing display, but these are things you won't change every five minutes so what...

I'm using the MPX-100 for additional guitar effects (together with Rocktron and Mesa Boogie gear). It is also used for any kind of signals in my homerecording setup (Drums, Synth, you name it). It is DEAD QUIET in operation! There are lots of Reverb, Pitch, Chorus,Flanger and even Tremolo/Rotary presets, and the all sound great. Just the pitch shifter seems to be a little slow in tracking, but it works OK. The overall sound is simple great (as you'd expect from Lexicon) but you'll have to figure out what presets sound good on which type of material...

N/A because I do not own it for a very long time yet. Looks and feels sturdy yet. (Apart from this, there isn't much to break about this simple unit). I'd gig without a backup.

N/A

The MPX-100 is a great allround-processor, and surely a good value. There's nothing fancy about it, it's all straight down the line, but done very well. (Rating 9 because of missing display)

Very easy to use. Setup in the music shop let me experiment with ease, but there was too much about the product to intake in one sitting. Good sounds take some tweaking, but come very naturally on the delays, echos, choruses, and reverbs. Especially the delays. Manual is very in-depth, lots of MIDI info, which i don't use. Only complaint is that i had to buy a rack, cuz this is my first rack product.

Setup--Fender American Standard Strat--Crybaby 535Q--Tube Driver 100-watt hybrid amp--Celestion 25-watt speakers 4x12. I run the MPX in the effects loop. Great tone, right out of the box. Literally. I'm a delay freak, so to speak, being a lead guitarist...gilmour tones, Eric Johnson, and satch are found in the delay/echo patch alone. Delay/reverb patch is blues bliss. Like I said before, delays and reverbs are superb...i couldn't ask for more. So much more natural than on my amp, and w/o the noise!! Flangers are OK, usable but not too great...pitch is ok as well, definitely usable...choruses are wonderful, especially on clean...check out the special FX section--some crazy sounds!! I hate to digress, but the delays---so many options it's not funny. Reverbs--lexicon makes the best reverbs in the world, bar none. You can't get better in these two categories, especially from the price. Only complaint is some noise if close to the amp, but that's probably just my amp....i give it a 10 anyway!

i gig w/ it, without a backup because i would have to buy another as a backup and there is no need. I can depend on it always for great tone, but it is scary seeing as dropping it if it wasn't in the rack would be disaster.

i can't say, but i've looked on their site before, and it is quite resourceful.

I bought this rack piece only because i was dissappointed in the delays and reverbs from my zoom, and the reverbs from my amp. This is SO MUCH better. It's much more natural and musical than the zoom. It makes my amp even sound better. Also, it serves as a wonderful processor. My only complaints lie within the fact that it is a rack product, and minimal noise...otherwise I recommend you go buy this if you're looking for a sweet delay/reverb machine. Especially for the price, it's a deal and a half.

Very easy to use.

For the money it is the best, no comparison.

Looks to be very well built, some complain about no power button - but it is one less thing to break!

N/A

This is where I complain. It sounds good, for the money has great midi control - even tap delay!! But when you combine Delay and Reverb together you can not adjust the Delay feedback. It is set at approx 30 to 40 %. You can have no more or no less!!!!. Now if you use just the single delay program (no reverb or anything) it has great adjustment controls. Common sense tell you that when one uses a processor with delay - they want to use the reverb too! Another example is the tremello. Sounds great! but you cannot combine it with reverb! (or anything elese) This would have been the processor for me if they would have let you still adust things when you combine 2 effects. I would have spent the extra for that. I ennded up sending it back after a week and bought there MPX-1 @ 900.00 for more adjustments.

Well... This unit has 7 knobs and 3 buttons... So it's, well... Very easy to use it. Lexicon has made an excelent simple manual for it.

I'm using it in my home stuido, as an rack effect... Is it noisy? well, I also have a Behringer Virtualizer... Compared to that, well... hehe... It's NOT. I use it in my keyboard setup. But I also use it when I play the bass in a band. For that kind of use, it is allright. If I Should pick out one effect that donsen't work very well; it would be the Picth. In my oppinion the best effect is the Delay, Echo.
I would give this unit an 8 or 9 in soundquality, but thinking of the prize! well... 10...

I would Surely depend on this one... The only minus is that the Powersupply is external !!!! This is not nice...

haven't had any trouble with it so far...And I don't think I ever will.

Almost Fantastic value... I don't know if I would buy this unit again, 'cause the technology makes the reverbs better and better... And the prices lower and lower! Well... I would properbly buy another verb. Maybe ever a better verb for the same price!

This unit is extremely easy to use, all of the controls are right on the front panel for you: input, mix, output, effect balance/level, adjust, store, tap, 2 rotary knobs to select your sound and to hear any one of 16 possible variations of that sound. There's no LCD display or anything like that- its also pretty small and extremely light- like only 2 lbs, I think. The unit is true stereo so you its got mono and stereo inpus and outputs, as well as a S/PDIF output, and a footswitch jack on the back, of course Lexicon doesn't give you one, the nice guys that they are. The manual covers everything you need to know if you can't figure it out. Total presets are 240 with 16 user sounds availble, that may sound limiting but all of the presets are fantastic. One thing that I thought was bad initally before I bought it was the fact that you can only have 2 effects at the same time but I don't even notice now.C'mon- do you really need 10 effects at once? Didn't think so. Anyway the sound quality is superb. I focus on quality rather than quantity.

The MPX-100 sounds absolutely amazing! Its dead quiet as the previous reviews have stated, no noise or hum or buzz comes out of this unit, even it you get it to clip. Its got 24 bit DSP processing, 20 bit A/D and D/A converters, the SPDIF, and its stereo! Where do I begin? First settings are hall and plate reverbs I think which are by far the best things I ever heard. It completely destorys other units that go for atleast 5 to 6 times as much. Nothing in this price range compares. You can get some subtle reverbs or make it sound like your on stage in a huge venue or amplitheatre. There are so many variations of sounds too plus you can mess around with it with the adjust knob and mix. You really do have a lot of control over the effects. There are also some amibience effects- subtle and nice- you can get that great short delay/reverb sound like on George's lead guitar part in the Beatles- "She Came In Through The Bathroom Window," or an Echoplex-ish sound like "Another Brick in the Wall pt 1." Delays range from ultra short to super long delays- you can get over 5 seconds of delay in mono and about 2.7 stereo. My only complaint with delays is that you can't get exact delay times, the tap button only gives you certain delay times, for example it will only go up by certain incriminets but still you can get most anything you'd like. They sound very natural and not overly "digital" at all. Next you've got chours sounds which are awesome- many variations- very rich, full, and lush- best I've ever heard- its destroys and Boss pedal you've ever played on. During the adjust knob all the way up gives you a very fat, thick chours sound- you can get some leslie sounds also. Next is flanger/phase- its sounds very good, not like an MXR pedal but its got its own personality- I can get that Alex Liefson-Rush lead guitar sound easily. Very rich and natural sounding. Tremolo effects and rotary speaker simulation sounds dead on- like your old Fender tube combo amp. Yes, like the previous review stated- its cool that you can move the adjust knob quickly and its will slowly catch up, again making it that much more realistic. Finally we've got pitch shifting/harmony- which I think is very good. Better than Rocktron Intellifex. Most harmonies sound natural and it will keep up with you even during fast playing. It is not intelligent unfortunately but still very good. If you could select which key you wanted to play in then you'd be set. You can get some wacky, strange harmonies like minor seconds and things like that- trying doing some tapping with that- its sounds so retarted! Octaves are dead on, not too digital sounding. You can go up or down like 3 or 4 octaves or certain patches- really weird. There are many sounds that have combinations like reverb/delay, chorus/flanger, pitch/reverb, etc. I use this with a Marshall 6100B 30th anniversary head into a Marshall 2x12 cab with Celestion 75 watt speakers. Initially when I got it, I hooked it thru the FX loop and I noticed that it had some tone coloration when you bypassed the MPX-100. It wasn't that apparent on clean settings, but definitely when you kick it into overdrive. Its sounds like it cuts the highs and makes the mids and bass more apparent. This isn't necessarily a bad thing but I didn't like that it messed with my tone. However- when I hooked it thru the line input into my Kittyhawk Quattro tube preamp, its sounds amazing. I'm using with a Gibson Les Paul Standard ('82 model w/Khaler trem), Strat Plus with Dimarzio fast track 2 in bridge and gold and blue lace sensors, and a '75 fender mustang. I also use a vintage EH small stone phaser, vintage big muff (modified it), Zoom Driver 5000, Boss EQ pedal, and Crybaby Wah. All the guitars sound really nice with it. The sounds you can get all sound really really good, best I've heard and this is very inexpensive. Definitely check it out if you're in the market for an FX processor. I've owned zoom and crap like that and it just blows them all out

Only had for about a week but very solid construction and seems very reliable- I'd gig with it without backup.

Never dealt with 'em, hopefully I never will.

Like I said, its amazing, best thing I've ever heard or played on. Sound quality is awesome, all patches are good and usefull no matter what style you play. I can now nail almost any sound I'd like. You must do yourself a major favor and check this unit out before you blow 5 to 6 times as much for something that isn't as good. Lexicon has done it- make a high quality unit at a very affordable price. Hats off to ya, Lexicon, keep up the good work!

You can't get much easier to use than this. Check the other reviews for more details, but basically two rotary knobs to select the patch, two for adjusting the sound and three for input, output and wet/dry mix. There isn't much to explain about this unit and the manual is adequate. Everything this baby does sounds great.

I use it for keyboard effects. It is completely quiet, I can't hear any difference between in-ciruit and bypass. You might think it's a bit limited because you have to use the preset effects, but with 16 variations of 16 basic single and dual effect patches, it's got all your basic effects needs covered.
It sounds great! I couldn't believe how much better it sounds over my alesis wedge. For a $200 effect rack, you can't go wrong with it.

It seems as solid as any modern piece of gear. I'd gig with it.

I haven't dealt with lexicon so i can't say.

This is by far the best value for rack effects. I'd buy it again, in fact I might buy another.

Get or borrow a Nanoverb. Use it alot for months if possible. Then when you buy this unit you won't be freaky about not being able to see the patch number. If you have a controller with a readout that will give you a little more security. Very easy to use.

The others have covered this completely. I do however get noise when running mono thru an effects loop (I'm using tube amps), but compared to most other stuff out there it pretty quiet. Nice sound. I tried it thru all my Fender amps without a problem. High gain amps may get a little quirky. (noisy). Just watch how much input signal you give the return.

Hell if I know. I would use it without backup because I like to play and my sound isn't dependent on a bunch of processors. I would bring a spare amp and guitar however.

No idea.

If you're low on cash and don't need midi, go for a Nanoverb. Otherwise buy this. I could afford to spend alot more but another $500 bucks won't make me sound any better. I am running it mono and it is still impressive. The ASIC guy and designer that put this together deserves a raise. This is a real thing, not a toy.

This unit is very easy to use. It has seven knobs and three toggle switches. Lexicon has thoughtfully designed this unit so that it's power may be efficiently tapped with a minimum of learning overhead and general interface hassle. The manual is excellent and thoroughly covers every aspect of operating the MPX-100. This is nowhere near as difficult to use as the average multi-effects processor on the market today. At the same time, it's not as "tweakable" either, but all the sounds are very usable without requiring much tweaking.
Unfortunately, I have to deduct two points because of the annoying attempt to be more "user-friendly" by allowing users to modify delay times only by using the "Tap" button. This is totally inadequate for someone requiring precise delay times.

I use this in a stereo guitar rig. It is ABSOLUTELY DEAD QUIET. NO NOISE. NONE. I have listened to it through professional headphones which have a flat EQ response from 10 Hz to 20 kHz and it really is beautifully silent. I believe the lack of noise may be attributable to the fact that it has uses an external wall wart instead of having the power transformer inside the unit. While this design is somewhat cumbersome compared to the alternative, the compromise is well worth it since silent operation is one of everyone's top priorities, especially those who plan on using this in a studio application.
The reverbs are simply outstanding. While designed to sound realistic, there are some huge-sounding and awe-inspiring reverberant spaces and even a couple of alternative reverb programs (e.g., the "Infinite" "Special FX" preset).
Choruses and flangers are both excellent and sound rich, warm and analog.
Delay is good (up to 5.5 seconds in mono and 2.7 in full-bandwidth stereo).
Pitch shifting is not very good. It's almost unusable because you can hear the processor chugging along and glitching subtly as it continuously scans the sampled input, something I've heard many lower-end pitch-shifters do also. No diatonic, chromatic, or other "intelligent" pitch shifting here.
The tremolo and rotary speaker emulations are very, very good. It's easy to get a Sevendust type of sound (a 100% wet square-wave tremolo) out of the unit (you must provide the crushing distortion, of course). I was really impressed that the rotary emulation presets even retain the inertial lag inherent to real Leslie-type rotating speaker cabinets (i.e., if it's spinning slowly and then you abruptly turn up the speed of rotation, it won't discontinuously jump up to that speed, but rather will catch up slowly due to the rotational inertia of the mass of the spinning speaker).
For the price of the MPX-100 I have no choice but to award it a '10' for sound quality. This is the way it should be.
For the record, I own an Eventide GTR4000 and have spent many hours using T.C. Electronics processors. Even compared to those high-end units, the MPX-100 holds its own.

It's a small, lightweight unit with a surprisingly thin profile for a rack-mount piece of gear. It feels solid to me. The cord for the wall wart would probably not endure much abuse before breaking though. I haven't had the unit long enough to rightfully comment on it's reliability.

Lexicon has very good customer support. Yes, I have had (albeit limited) experience with them. They have a good reputation and they deserve it.

If you need a truly excellent reverb / multi-effects unit and you can afford to spend a mere $200.00, stop reading this and GET ONE NOW! It blows all other sub-$1500.00 reverb units that I've used away, and that ain't no jive. I've compared it to DigiTech S-100 and which didn't hold a candle to the features or the sonic integrity of the MPX-100.
Pluses:
- true stereo throughput - left and right 1/4" inputs and outputs
- MIDI controllable (e.g., you can do whammy pitch-bending in real time with a MIDI continuous controller, or execute patch changes remotely, for example)
- unbelievable price point for a unit with this sound quality
- did I mention the price?
- true 20 Hz to 20 kHz frequency response - you can trust this baby won't mangle your tone
- the interface is so simple, even a drunk hillbilly could use it
- configurable bypass / mute
- 20-bit S/PDIF digital output with RCA connector
- 2 x 2 meters to let you know when you're overdriving the unit
Drawbacks / design flaws:
- no XLR input or output jacks (bad, . . . very, very bad)
- no power switch (What the hell were they thinking there???)
- the "Tap" button (which is the only way to set the delay time) isn't nearly as useful as a knob, it's too imprecise

This box must have been designed with "less is more" in mind. The 240 factory presets sound fantastic as is but if an adjustment (outside of Input, Mix, and Output) is needed you only have two knobs, Effects Lvl/Bal and Adjust, and a button, Tap, to mess with. Adjust effects only the essential parameters of a given patch, which makes it extremely easy to dial-in great tones.

I am primarily using the MPX 100 in the FX Loop of my guitar amp. This unit is very quiet as long as you keep the input level below clipping. The Plate, Gate, Hall, Chamber, Ambience, and Room reverbs sound terrific, not harsh or fake. The reverbs are the main reason I bought this unit. Here are my impressions of the other effects the MPX 100 offers:
Tremolo - warm, accurate but not digital sounding Rotary - Not very realistic but certainly usable Chorus - Two excellent and distinctly different voicings one subtle and lush, the other out-of-phase and resonant Flange - Not like an old MXR pedal, my favorite, but still usable Pitch - Not intelligent pitch shifting but again very usable Detune - From subtle, my preference, to over-the-top Delay - Not much control but well designed and great sounding patches Echo - Very warm, great Tape Echo simulations

I've had no problems with it for the long week I've owned it. I really can't comment on this topic yet.

I did request some operational information from Lexicon through e-mail. I received a response the next day. Although this in itself doesn't warrant a high rating in this category, it certainly bodes well for Lexicon.

Yes, there are some limitations in this box, it only has 16 user patches, no digital in, and only a few combinations of effects. With that said, it is still a fantastic value. I don't think you can beat the reverbs alone for this price. Throw in some really nice tremolo, chorus, and echo and you've really got a deal!

If you've got a thumb and forefinger, you've got this thing figured out. Its shweeet. The manual is nice for figuring out what parameters can get tweeked but you can get by w/out it.

Oh my God!!!! It can't be true! I'm telling you I don't see why you'd bother getting anything else in this price range. I'd recommend getting 2 or three of these things w/ a compressor and your setup will be singing. You'd be surprised what you can do w/ this thing even though its only 200 bucks. There's no possible way you can convince me anything comes close. Believe me I've heard them all and for this price point you normally pay about 2 to 3 times that for the quality of sound. Granted your stuck w/ less programmability (which was a major concern of mine) although I promise you'll be quite satisfied. Also, its MIDI! that kicks ass.

It isn't broken yet.

No need at the moment

As mentioned, I'd pretty much throw anything else away under $300 bucks once you've had this. I'm planning on getting maybe 2 more for my recording studio. If it were stolen or lost, I'd get a new one w/out hesitation. I'm sorry it doesn't have more programmability but if I give that up for price, I'm willing to make the sacrifice.

Pretty easy to use... 7 pots... 3 buttons! Read the manual and you're set!

Hell... this is the BEST cheap reverb I ever heard!!! If you want a good cheap reverb, this thing is the best you can buy... in fact... in a mix... I don't really see the difference with a PCM80 for example...

Got it 10 minutes ago... but it's Lexicon, so I guess it's good :)

dunno

This effects processor is WAY better than the older Alex and Reflex... in fact, it's closer in sound quality to a pcm80 than to an Alex... just buy this unit!

It's been said before, this one is very easy to use.

I tried to get this one to sound bad by turning the input level to it's maximum, but it produced almost no noice at all. You can't get this unit to sound bad. I still haven't tried this unit enough but after 12 hours I'm in love with it. It's an awesome piece of equipment considering it's price, well even if you don't consider the price. I was just about to get an LXP-15 and I'm happy I got this one instead...

It looks and feels reliable, and since I don't have to rely on it I would go without a backup, if you don't go with a backup for some piece of equipment that you can't be without then you're stupid.

Haven't dealt with them yet...

I play mostly industrial music, pretty much like Ministry and then I play gothic. I'll use this one both for singing and for my guitar. Well I'm too lazy to write everything that I love about this thing and before I bought it I was a bit puzzled because som guy gave this piece a "1" in sound quality. I bought it anyway and, well it's too good for it's price.

The presets sound pretty damn good right out of the box. If the presets don't grab you a little tweek of a nob or two and you'll find what your looking for. The almost intuitive design of the unit makes the manual optional for most of tweeking. Though the manual was pretty good it could have gone into more depth, been a bit more organised. But in all truth it's not difficult to understand, just multiple uses for the same nobs(lets hear it for nobs over keypads) and buttons and MIDI implementation to look for. I only give nine because the manual could have been better.

I'm using it with a 51' Fender Telecaster, a Sure SM57 mic, a Samick acoustic, a Conn Trombone, a plethera of samplers and synths, on a Fender and a custom amp, and in the AUX send/return of my mixer. Noise! Noise...Did you hear a noise? No!!! This unit makes absolutely no noise. The effects blew me away, on a unit this price I don't think you can get much better than this. But of course watch your EQ settings as with every reverb I've heard it sounds artifical when you have your high end set to high and your mids cut to far back. Though a little tweaking I've gotten much of the Nine Inch Nails sound, a little of Bowie, Jack Off Jill, Marilyn Manson, Pearl Jam, Nirvana, Jane's Addiction, Ozzy, Garbage, Tool, Queen, and close to Type O Negative. Some of my favorites are under Special FX like Infinite Reverb is great for long drawn out chords, The Abyss good on guitar and a great very interesting effect on vocals, and Number 14:Dream Sequence has shown me some interesting possiblities. The Reverbs are great and the pitch shifter is better than adverage. There might be better sounding units, but I love it and at the price, "10" solid.

Well built, sturdy, and though I've only had it awhile I'm pretty sure I can depend on it. It's not been taken on a gig yet, but I could use it without a back-up and fell safe about it. I haven't taken it on a gig yet(and we all know gig's are the most likely place for something to go wrong) so I have to give it an 8.

Never delt with them.

I play my orginal music with a few covers mixed in for fun and my style is veried as are the covers, but it suits everything well. I've been playing guitar for less than a year, keys for about 2 years, trombone for about 5, Vocals for about 7(publicly only 4) and verious things not orginally intended as musical instuments. If it were lost I would flip out and mow down by-standers with gun fire, and if were stolen I would mulilate whoever stole it. I love the entire thing, and the fact I can use a good 'ol fashion foot petal for tap and bypass(though I plan on eventually give MIDI control a shot). I compared it to simmilar products by ART, Digitech, and Zoom, and it beat them hands down in quantity of effects and quality(though the Vocoder effect on two of the other units would have been interesting). This has helped me unleash things I had in my head for years and couldn't find away to do them. Also, it's helped inspire me towards new directions, complexity, and material- very important because I was having trouble writing new material for when I go into the studio in a few weeks. This unit is going into the studio with me, no question! I generally have stayed away from buying units(I borrow everyone else's or rent), but I had to have this one. Great unit especially for the money.

Easy to use but sounds cheap. Manual is very good.

I wanted to use this in my studio. It is very quiet. This is not what I expected from Lexicon. Reverbs are like cheap digitech processors. Very artificial sounding. Not warm souinding.

Very well made but I will never use it.

They have been very Quick to answer my questions on this processor through e-mail before I purchased it.

I am into Peter Gabriel, Brian Eno, Jeff Buckley, Dead Can Dance, Eric Serra, Michael Brook and early U2. This processor does not help me to achieve those kinds of sounds. I have owned other Lexicon processors and this one's a dud. In this price range go for the new ART Quadra FX. I think it sounds superior by far. Especially the reverbs.

You cannot get a bad sound (unless you want one!) out of this box. The justly famous Lex reverb is worth the price, but you also get chorus, flange, pitch shift, detune, leslie & tremolo, long delay (5.7 sec!), and programs with multiple effects (a first for Lex in this range). There are 240 presets (all great and useful) and 16 user locations, but editing is rather minimal. However, Lexicon has gotten the most out of the "variation knob" approach, and the variety of effects you can get is unmatched in this price range. The unit is true stereo and you can use it as two independent effects. There is an S/PDIF digital output on an RCA jack (but no similar input). MIDI control is not extensive, but can be used to select programs, input MIDI clock for delay sync, etc. The manual is brief but covers all you need. Definitely easy to use.

I have owned PCM 60's, LXP-1's, LXP-5's, a Reflex, and Vortexes. I am very, very happy with the sound of the MPX 100 in comparison with these. As far as noise, fuhggeduhboudit--there ain't any. Also, I think this is the first budget Lex with 20-20 kHz fidelity. Just got the unit and don't have the experience that will come over months, but in short, it seems to be superb.

Have never once in many years had any problems with a Lexicon device, and don't expect any now.

One time I bought a used item and needed a wall wart for it. Lexicon's response was helpful, friendly, and quick--but expensive.

I know we're asked to be critical in these comments, but there's little to be unhappy about here. I've owned a lot of effects, mostly in the under-$400 range, but this takes the cake. The bang-for-buck ratio is through the roof. If you buy a Midiverb or Zoom without checking out this unit, you will kick yourself--hard. If I were putting together a home studio from scratch, I would buy four of these immediately. Yeah, sure--I'd like to see a bunch of parameters variable realtime through MIDI. But the sounds you can get, and the degree of variation through simple adjustment, is unbelievable for this price. How do these Lexicon guys do it?? If somebody stole my MPX 100, I would find him and I would kill him.