Harmony H304A

Volume and TOne Controls - 3 inputs - nice tube tone - what more do you need?

This little amp sounds freaking GREAT - in my humble opinion. I only have two ears and 4 guitars to plug into it but it al sounds terrific tome.

Hmmm... 42 years old and still rocking - gott be made decent. Of course it's a tube amp so .. got keep an eye on the parts.

Huh,...? Does Harmony still exist?

Okay - here's the deal. I got a great bargain on this amp - almost felt bad for the old guy it bought it off. It's not the prettiest shape - ahs some trears and stains on the case - and the leather handleis long gone - but everything ielse is terrific. He replaced the original 10" speaker with a Weber Classic Alonico - that sounds AWESOME to my ears. And the tubes are all either RCA NOS or nice JJ and Eurotubes. He really new good tone that's for sure. This little baby Rocks - and the best part is I can turn it up to where it sings and it stillain't too loud. Compared to mey stupdid CHAMP 12 that i paid twice as much for this amp RULES!! I play a combination of VIntage Surf and Retro tunes and Alternative Rock / Punk - I have 5 amps - 3 are all tube - and I Highly recommend this great little known Vintage Tube combo. Harmony either really knew what they were doing orthey just got lucky on this one. BUY IT!!

Pretty basic stuff. Volume, Tone, 3 input jacks. The power transformer has an October, 1962 date. Tube set is 6C4, 6AT6, 6V6 and 5Y3.

Had some hum and hiss when I got it, and had some tears in the speaker cone. Replaced speaker with a Ted Weber 12A100, replaced the filter cap can (also from Ted Weber), replaced caps, replaced carbon comp resistors with metal film, rewired volume & tone pots with shielded wire, rewired heaters with twisted wires. Removed cap from A/C to chassis, rewired with 3 prong cord, wired black A/C lead to fuse then to switch, removed capacitor from A/C to chassis (Amazing what could get UL rated in 1962). I also put a switchcraft shorting jack in the hole for the speaker wire grommet and added an 8 ohm 25 watt power resistor such that when a speaker is not plugged into the jack then it shorts to the power resistor to avoid running the amp w/o load. The speaker jack allows an attenuator to be inserted between the amp & the speaker and allows the speaker to be connected to different heads.

After the foregoing, the amp is very quiet, no hum, no hiss, no pops. Nice distortion, loud for a bedroom when cranked, but not painfully loud.

I think it will probably be pretty reliable, transformers look like they are pretty good shape, tubes all test good.

I have an H-303A also. I rebuilt that one also, but could not get rid of all of the hum. I would definitely go with the 304-A over the 303-A.

I picked this up as a harp amp after using one at an open mic night. (It took me a while to find one!)Manufactured in Chicago, probably early to mid 60's. Basic features. Ten inch speaker, three inputs, volume, tone, fuse, jewel light. Tube compliment is prime for harp. 6v6 power with a 5y3 rectifier. Other tubes are 6at6 and a 6c4. I use this for harp, so that's about all I need!

I use this as a harp amp and love the edgy, honking tone that this gets. I can only get it to 3 or 4 before feedback, but that's plenty loud. The distortion is grainy Chicago raunch, with some nice natural sustain. I have used the full range of Astatic, Shure, and other vintage mics on this. It likes the crystal the best -- particularly an older Shure I use that isn't quite as high in output as my others. This give me a bit more volume range before feedback. My buddy loves this amp for his Strat. The tone difference from the harp is striking. The tone is so rich and warm until about 7 where it starts breaking up. I haven't heard it with any effects, so its tough to say what else it can do. It is

I've owned this for five years now and it has been very reliable. I have had it serviced twice in that time and other than replacing tubes and adding a three pronged cord, it hasn't needed a thing. pretty impressive for a 40 year old amp.

I have been playing harp for about 20 years, and have been playing with amplified harp for about ten. I also own a Valco Chicago 51, and a 70's Champ. Those are great, but this also has great tone and some balls to boot. The one drawback is the narrow window of range for the tone I want before feedback. Too loud for home when the family is a round. It hasn't been a problem, since I usually use this when I jam or play out and that volume is prime in those circumstances. If it were lost or stolen, I'd cry and then try to find another!

Made in Chicago, not sure of the date---seems like mid 60's. 10" speaker. 2 knobs: volume and tone. on/off switch. all tube (old mix of tubes--you have to go to a web site to get more, Guitar Center doesn't have all the kinds). 2 amp fuse. 3 inputs (!). no reverb. no channel switching--similar to Fender Pro Jr.---you change overdrive by your volume knob. This doesn't have the gain of a Pro Jr. --but has alot more headroom.

Doesn't sound too bad. Definately a "blues" style amp. Pretty good clean headroom---when you crank it up, produces nice mild overdrive. I've used this at informal jams and smaller (coffee-house, etc..) style gigs. I have an SKB pedal board with a crybaby wah, boss metal zone,proco rat, chandler era tube driver, Boss ce-5 chorus, E.H. small stone phase shifter and a 80's Digitech digital delay/sampler. Running that through the amp, it sounds pretty damn good--with a good variety of sounds. The amp on it's own sounds much better than my Marshall solid state 15 watt little practice amp (although the Marshall has more gain, it can't suss the tube vibe). Not as good as a Fender Super Champ that I once had.

Never gig without a back-up. Although it's never broken down either...

never delt with them (Harmony).

Overall, not a bad little practice/small gig amp. I rarely see any of these around. For a hand-wired little tone jewel--it's much better than any of the solid state crap being mass produced now. For the price, you can't go wrong.