Ampli Polytone baby brute USA hp 8’’

Vintage collector rare Beauty pour connaisseurs

basse & guitare jazz & plus really nice - small space

75 watts en sortie pour connaisseurs

a seriously good sound for archtop guitar

polytone amps are the best amplifiers for jazz guitar ever made. And this amp, is very loud.

même la strat & tele sonne jazz &

même le canal saturé est super crunch.
- 2 entrées hi et low
- 3 modes de brite à dark
- gain + et -
- distortion
- réglages bass, médiums et aigus
- 1 sortie main
- 1 sortie casque
- 1 sortie ht parleur externe

- reverb hors service !!
En bon état pour son age avec un peu de poussière

des années 1980 environ reverb button & cable pas original
le vrai son jazz Georges Benson & Joe Pass John Scofield, Attila Zoller Jim Hall etc. un régal !

Gibson ES-175 , ibanez, d’angelico, gretsch, Benedetto,
Jazz, archtop, super 400


les avis :

Polytones sound so different and so good for jazz ! There are such a large amount of solid state amps but none of them sound quite like a Polytone.

polytone amps are the best amplifiers

for archtop jazz guitar ever made.

It matches perfectly with es 175 and well with an L5.

The Baby Brute is a real find. Those that have them hang onto them. I have one and it is probably the best archtop guitar amp--in particular, the best ES-175 amp--of all of my Polytones.


Well damn does it sound good. I think it gives it character

this is the black, 8" speaker minibrute so it is very different than the henriksen, which is super clean and just beautiful sounding. It is like a pretty girl or something who is well put together and the Polytone is the girl you party with who doesn't wear makeup and is a blast to be with.

So i am wondering, what is it that makes Polytones sound so different and so good for jazz? There are such a large amount of solid state amps but none of them sound quite like a Polytone. I know they have an unconventional setup, things I don't know - I would like to learn .

And now I am in a quandary...I might have to use the Polytone for this gig coming up. It is a Jim Hall/Bill Evans tribute recital and it is in a really nice small space with great acoustics.

Polytones do have a unique sound, especially older ones (pre sonic-circuit). As other things in life, they seem to be a "happy accident", since they were not designed for guitar (and sound very good with archtops and semis, to my ears). I've seen it attributed to the power amp chips, but I know people who changed the power amps in their Polys and the sound didn't change. The cab/speaker do play a role, and the speaker is an Eminence OEM (not sure if the impedance matters or not). And, of course, the preamp. I have a Polytone preamp pedal that I use with my digital rig - it gets a lot of the Poly vibe but not all of it. I don't have any impulse responses of Polytone cabs, but I hope to have soon and solve the mistery, I bet just the preamp and the cabs get 99% of the sound.


Rio, Your Polytone is Baby Brute and it is from late 70s/early 80s. I have similar amp and I love it too. I bet the secret lies in preamp. I once had a Polytone 102 in which I changed the speaker to Eminence Beta 12A. It still sounded Polytone – or maybe even more Polytone!I have understood that the 'warmth' comes from mosfets, not usual transistors. Mosfets are more tube-like. They just have the relation of bass/mids/highs where it should. They are made to sound like Ampeg Geminis, which where accordion amps originally too. (So I have heard.) Maybe we guitarists just have to thank the accordionists for Polytone!



There are lots of things that go into a Polytone MiniBrute amp. Cheesy OpAmp chips that aren't too clean/pristine in the preamp section. A comparatively high power solid-state power amp (for a class A/B design that is operating in a small-volume, sealed cabinet . High-compliance CTS speakers (early MiniBrutes) or Eminence high-compliance speakers (MiniBrutes after about 1984). Baxandall tone circuitry. Early models had just treble/bass. Later models had treble/mid/bass.

I like all of them, but my very favorites are the MiniBrutes with simple preamp ICs, and CTS speakers. These are mostly the felt covered ones and the early diamond Tolex ones. Then, again, my blue Tolex MiniBrute from the 90s also sounds great.
polytone amps are the best amplifiers for archtop jazz guitar ever made.

It matches perfectly with es 175 and well with an L5.
there are some modern replacement that I try such as:
henriksen, jazzkat, mambo, Aer, Evans, fender jazz king, Schertler, mark jazz 12, roland cube etc

All sounds great but “cold” compared to the old polytones.
Diamond cover 80’s CTS are the best, non sonic circuit. I got mine mbII 1981 3 knobs plus reverb and red concentric distortion knob.
Is JAZZ!!


"better" in general is not something I can comment on. But there are two Polytone Minibrutes in my office, and several fine tube amps downstairs. Where the polytones really prove their worth to me is with P90s, and variations thereof. A low-cost, yet impressive Epi Casino sounds best through the MB II, at the lower volumes I typically practice. Same goes with the old Guild X-50, with it's P-90 like Franz p/u, and the Silvertone 1427 archtop with P-13s.

Polytones are fat, warm, slightly compressed, and you play it side by side with an amazing tube amp, are pretty impressive sounding.


The Baby Brute is a real find. Those that have them hang onto them. I have one and it is probably the best archtop guitar amp--in particular, the best ES-175 amp--of all of my Polytones.

There is something about the one cubic-foot enclosure and the 4-ohm 8" speaker that just translates to an incredible sound for an ES-175. (or ES-165, of course)

I was at a big vintage show once and offered to buy several Baby Brutes from different guitar sellers. Each guy said "no way."



the 8” speaker helps to bring out naturally

the midrange 175 sound.

Amen to the Babies. I like the open back a lot, sealed cabs often sound kind of boxy to me. It seems to suit me better than my old MB II did and loves my archtop with floating CC, but my 'bucker semi-hollow Tele also sounds great through it as did my GB10 and even nylon string. And bonus- my wife said "another amp?" followed by "it's so cute!"




New Baby Brute owner here as well. They really nailed the frequency response of this amp. Other amps I have always go up on a stand to eliminate boominess, but this little box is just about perfect for my ES-125.

The Mini Brute has coaxial knobs. Reverb is one knob. Volume/Distortion is another knob (coax). Treble/Mid is another knob (coax). Finally, Bass is a knob. Also, there is a distortion boost switch and the ubiquitous Brite/Dark switch.

The reverb on Polytone amps is kind of dorky anyway. Small cabinets/short springs equals boinky reverb, IMO. Brite I keep in the middle position. Next, I generally use Bass/Treble/Mid at almost middle/almost middle/middle of range values. Amp volume I run about at mid-range. With a ES-175, I put the guitar volume at about nine-o'clock and the tone just below 12 o'clock. (humbucker) This works well. No feedback with flat wound strings, but I don't sit particularly close to the amp.
amen Greentone!
I can pay 1000/1200$ for one of them.
Here in europe, it doesn’t exist.
In Usa, Australia is very very rare.
Lots of them had been shipped in Japan during the 80’s. (custom orders? who know..)


Polytone were homemade non commercial machines. The concept is unique.
Basically a simple HIFI amp, the secret are the wood cabin, speaker and preamp.
All the components are solid but prone to crossover and chips overheat.
Opening and repair one is pretty easy, just be careful to not touch and breath the sticky fiberglass insulation... and of course.
They smells bad, fascinating bad!

I've been enjoying mine for over a decade...
The weak link in the early ones is the obsolete LM391 chip.

George Benson is still using the latest V (15 speaker), johnathan kreisberg is using IV, Kurt rosenwinkel the II.
Lots of them combine a tube amp like fender twin or deluxe rev with polytone and blend the stereo sound.
Do you ever had the V?


In 1974, I saw Joe Pass play at an upstairs nightclub in NYC. He left with his guitar in one hand and his Polytone in the other. The next day, I put my Twin Reverb (loaded with JBL's) up for sale. The day it sold, I went up to 48th Street and bought a Polytone Mini-Brute (Felt cover). I used that guitar until 1980 without a single problem. I sold it to finance a bigger amp (I joined a rock band and needed something "bigger").

My current Polytone (the 7th Polytone that I have owned and probably the last) is a 2008 Mini-Brain reissue. I have had it since it was new. Never a problem.
Polytone's were a great jazz amp

I bet there are a bunch of us around 60 years of age who went Polytone after seeing Jim Hall, Herb Ellis, and Joe Pass in the 70s.Gibson ES 175/Mini Brute.
Joe Pass' playing is inspiring, but the plywood ES-175 doesn't come across best as an acoustic instrument. Pass' tone is _really_ uninspiring on the Virtuoso albums from that session. (3 of the 4 albums, I think)
If you heard him live--i.e., like Jazz Baltica, or listen to the Herb Ellis/Joe Pass Duo group on the album 7 Com 11--he sounds great (IMO) with the Polytone/ES-175 rig.
Few people understand it's potential. As an acoustic guitar player who made the transition to electric and rock bands after many years of pure acoustic tone, I found the Polytone to be a cut above most of the other guitar amps out there.

Actually, I like it so much, that I'm one of those rare people who thinks tube amps are crap. Tubes burn out, tubes distort easily, tubes are expensive, tubes make my guitar sound broken and cheap. The Polytone 103 lets me control my sound. I can start with a perfect clear sound, use that as my base, and bring in different effects as needed. I think it would be next to impossible to find a brand new solid state amp in a guitar store of today that can compare to this Vintage Beauty.
And this amp, is very loud. Actually I've been looking for a second Polytone amp to take advantage of the 360 stereo output. Very hard to find.
So if you are someone who wants to hear the complexity and friction between your notes, then this is the amp for you.


My son and I played a gig last night to a packed room that Springsteen played years back. It's a big, university gym. We played a Strat (me) and a Tele (son). We used a straight up Polytone setup: Polytone MiniBrute II (me), Polytone MiniBrute III with reverb pedal (son), and a Polytone MiniBrute PA. Reports from musicians in the room were uniformly praiseworthy.
I often use much more modern equipment. However, the old Polytone gear will get the job done...every time.


Ampli Polytone mini brute II,

100 watts en sortie pour connaisseurs
- 2 entrées hi et low
- 3 modes de brite à dark
- gain + et -
- distortion
- réglages bass, médiums et aigus
- 1 sortie main
- 1 sortie casque
- 1 sortie ht parleur externe
En super état années 1980 environ
le vrai son jazz Georges Benson, un régal !