Yamaha G100-212-III

I bought this Yamaha amp (G100-212-III) from eBay for about 412$.
It has 2 channels ( clean, distortion), reverb, presence and parametric EQ. It is versatile for different Styles ( From Blues, Jazz to Rock, Punk, Grunge, Alternative and even Metal).
I used it often live and it works and sounds great. You get a lot of features for versatile styles with this amp.

I play a Fender USA with DiMarzio-Pickups. I get everything from nice clean tones to hard distorted Sounds. Works best for using effect-pedals ( like I do now: Boss MetalZone, some Reverb and a WahWah).
But the sound without is great too. Everything from Jazz, Blues over Rock to Grunge, Punk and Metal. The distortion can get very dirty, but is always defined. Very good!

Never had any probs so far! I can play without a backup on gigs. It's a ten...

Never dealt with them, that's a ten too...

Nice amp for a low price. The two speakers make a good sound. This thing is versatile enough for any kind of music... Good lady!
For this price it's a very good amp. Will lead you on the way to your Mesa Dual Recifter... ;)

I bought this Yamaha amp (G100-212-III) from a frend of my fathers for about 100 bucks. It doesn't say the year that it was built but i'm guessing it's not very new, probably mid to early 90's.
I play a mix of Rock and punk Rock, with the occasional light alternative music, and this amp is really good for each of those styles. It comes with 2 channels, reverb, presence and parametric EQ, which is enough to give you just about any sound you want (my opinion). the only problem i have is that it's a bit bulky and with all the crap i lug around to each gig it would be nice for something a little smaller, but i highly doubt i'll be getting rid of this amp any time soon.

As i said above this amp provides a lot of variety. each channal has it's own volume, treble, middle, and bass, but channal 2 has an extra knob for gain. and if that's not enough for you, you can also pull out the volume (on the first channel) and/or the gain (on the second channel) for a mid boost. that's nice for those songs that you just need the little boost on. In the Paramatic EQ, there are three knobs, Level, Q, and Frequency. It also has a Presence and Reverb, so i don't think you'll be getting to bored with this puppy for awhile. i'm not to sure of the sound quality though, because the guitar i use is a foreign peice of junk that was never grounded right, and for some reason no matter what i do i can't fix it, and neither can all the shops i've taken it to. So i get the hum that comes with an badly grounded guitar, and i'm sure it's not the amp. i do know that when you get the thing cranked up to full on the volume and gain it doesn't get very distorted, so that's a plus, and when you get distortion on this you're ready for any size theater. (but watch out, apparently neighbors find it to loud sometimes, i now have about 5 different cops that are tired of coming over, lol)

alright, i've had this amp for about a year, and the only problem i've had with it (and this is from day 1) is that some of the stereo fuses blow a lot, and about a week ago they've really started blowing out, and i can't figure out why. i've blown fuses right before i've started a couple of gigs, and so i could've used a back up sometimes. as for the fuses, i've had no other problems with it.

The fuse problem has sent me searching for any kind've wiring schematic for this amp. first place i went was yamaha's website, did it help,....... HECK NO, if i spent about an hour searching the site or a couple of days with it's tech support maybe i'd find something but i don't have that much time. so as i searched for a site that might help i ran into this one and thought i'd leave my oppinion's before continuing the search. (that's why these aren't to detailed.) so for right now customer support is kind've low.

I'd buy me another one if this was stolen, but i doubt i'd be able to find another one. it seems like it's not a really popular one and therefore i haven't seen this model around much. i have yet to compare it to other products but i don't think i need to, i'm confident in it's sound and plan on using it for a very long time.

This solid-state combo has two channels, switchable by optional footswitch, each with its own 3 level EQ. It also has a parametric EQ, an effects loop, a line out, a headphone jack, and reverb with presence control. My only wish would be for stereo input and output; someday I'll buy a Mosvalve power-amp to take care of that.

This amp sounds incredibly nice with my Yamaha 712 Pacifica, which has a Dimarzio humbucker in the bridge and hum-cancelling stacked single coils in the mid and neck positions. After some initial fiddling with the EQs, I was able to find settings which gave me a great selection of crunch, glassy sparkle, tubish mids, or hollow acousticity. VERY versatile.
Unfortunately, I've yet to find good settings on this amp for my Fender Strat. It sounds ok, but not nearly as nice as the Pacifica. This strikes me as odd since my Strat normally sounds much better on most amps than its Yamaha brother. I think this may be due in part to the Strat's maple neck instead of the rosewood neck of my Pacifica.
I'm in love with the clean channel. It sustains nicely at high volumes, without overdriving too much. The gain channel sounds poor on most settings but can be improved vastly by fooling with the Parametric EQ. Personally, I like taking a lot of the mid out of the gain EQ, but pulling on the mid boost on the gain knob at the same time. The concept sounds like a contradiction, but the result sounds nice to me. For killer distortion, I plug my Big Muff Pi, Ibanez Tubescreamer, and MXR Distortion + (EQed to boost mid) into the effects loop (mixing the Muff and the + with a Boss LS-2).
When I want to play really loud and get great sonic solos, I use my Tech 21 Sansamp GT before the input. It can sound just like a pricey Marshall stack. Though if you do this too much, you might not be able to hear the difference (or anything else) after a while. :)

It's never given me a problem, though the Yamaha plate broke off the front, and it looks quite cosmetically degenerate. Could be a plus, for some people. :)
A guitar tech I know and trust tells me that "Yamaha stuff" is well made, reliable, and solid. I've had a Yamaha effect pedal die on me once, but otherwise he's been absolutely right.

Yamaha never answers my questions. Luckily, the local music shop people have been very good at helping me. (They told me to disconnect the speaker in order to use headphones, for instance, when I thought my headphones simply didn't work.)

I like this amp a lot, sound-wise. It's rather heavy to lug around, and the power plug is only two-pronged (so be sure to use a surge-protector!) You'll need to fool around with the settings to get the sounds you like. If you play it in a store and think it's a piece of shit, it's probably just the settings that need some tweaking. Once you get your sweet-spots set, though, it's easy plug and play.
Generally, I'm not interested in big combo amps. I'd prefer to have a nice pre-amp, a good power-amp, and some FLITE cabinets. That option being financially impossible for me, I'm happy with the G100 and, for the price, would definitely buy it again.