Closed May 23 and May 26.
We now offer Guitar Repair by Harley! More info

We also now offer a small assortment of strings, accessories, and drum sticks.

Monday 9-5pm
Tuesday 9-5pm
Wednesday 9-5pm
Thursday 2-5pm
Friday 9-5pm 11-4pm open office hours with Harley
Saturday 11-4 by appointment with Harley

Closed weekends and holidays
We accept cash, credit card, Venmo, or Zelle.

Drop off and pick up for small amps is also available at
Music Go Round, Natick
Matt's Music Center in Weymouth
If it's big, please bring it to Somerville

Name: Judge Amps
Address: 108 Vernon Street, Somerville, MA, 02145, US
Telephone: (617) 863-7351

Based on the Krinard/Dumble Ultraphonix Bandmaster that was in a few months ago, I made my own out of this Concert. It's more of a rebuild than a mod with new transformers. The gain stages and types are the same but pretty much every component value is different. It does have a sort of compressed out of phase sound thats cool. It also has way less gain and isn't super loud, but loud enough. It isn't super bright like a lot of Dumble circuits.

This one is for sale with my custom cabinet!

Install a good speaker, clean up the controls and you get a great punk amp or rehearsal space beater.

Baby jazz chorus might be just as good but more manageable?

Is the Quad Reverb the largest Fender combo?

New fireball tolex on this ENGL Fireball

Blonde boogie. I feel like every Mesa from this era that I’ve seen was built a little differently.

The JUDGE S100B demonstration by @eastyofficial 100 watts of rich harmonic tones. Great for 6 string, bass, or baritone. The EF86 tube is the secret to the complexity of this original circuit.

New to me Marshall cab I picked up from @lennylashley I did some mods: speaker swap and stereo/multi impedance plate. This is available as a rental. It’s giant, sounds very rock and roll, and is in a flight case.

The new JUDGE TB15 combo. Demonstration by @eastyofficial

Stay tuned for more videos with Sam performing at the Judge Amps workshop

Don't forget about the JUDGE DRIVER!
www.judgeamps.com
#pinkled

JUDGE KILOR - new batch is ready at www.judgeamps.com

The 5150 makes the most musical sounding mush. I like it.

Coming soon… a true gen 1 clone with modern premium components.

Another reissue gutted and hand wired with a speaker upgrade. I really think these mods are significant and make this a pro quality amp with tons more detail and pleasing harmonics.

There’s just something about McIntosh mono blocks that I love.

‘73 Deluxe Reverb with a Utah speaker. Been to hell and back but sounding great now. This one is for sale at a players grade price.

Whether it’s a motorcycle, piano, snow blower, or bass amp, you can count on Yamaha.

Fender Bandmaster with the Dumble Ultraphonix mod done by Bill Krinard of Two Rock for @hanselchen0216

1962 Fender Deluxe looking and sounding great. This one is for sale on behalf of the owner.

Ultra rare Thor amp made by the son of Jim Marshall of Marshall amps. This one has a failed output transformer unfortunately. It’s pretty much an awkwardly laid out clone of Super Lead.

JUDGE Driver into a JUDGE GD20
Let's get the pit going.

Been a while since I installed an iso transformer on a widow maker. Silvertone Model 1430

Hiwatt Lead 30 in for repair. Ziggy is less excited than I am.

4 Sale 1964 Fender Concert head conversion. New Mercury Magnetics Power transformer and bigger twin reverb output transformer.

Who is familiar with the Fender Fuzz/Wah/Volume pedal? I wasn’t until this was dropped off. I like the fuzz and the shifty volume adjustment

JUDGE Kilor and Driver available @musicgoroundboston and @mattsmusiccenter

4 Fender Deluxe Reverb Reissues have been dropped off for repair in the past week. Do you own one? Used to? Want one?

JUDGE BL15R available @musicgoroundboston

Our take on the famous AA764 circuit with a more aggressive/punchier speaker, richer sounding tremolo, quieter reverb, and more harmonic detail.

This Beta Lead from @liter_of_water ended up being a big project. 9 pots replaced, 6 capacitors, and a repaired reverb tank. CE now offers replacement knobs but it a a pain to get modern replacement pots lined up.

Working on a nice Gibson Falcon today. GA 19 RVT

Sometimes general service can make your amp sound as good as new or better. We look over components, test tubes, tighten tube socket pins, clean controls, check for correct voltages, and so on. Drop yours off today!

Made for Fender by RCA. I have never seen this!

Randall Thrasher in for repairs. This amp has an interesting mix of tube and transistors in the clean channel circuit.

Next up on "How We," I briefly demonstrate how we tighten tube socket pins on this old Super Reverb. Loose pins cause all kinds of problems like crackles, bias issues, cut outs when played loudly, etc.

How we test tubes at Judge Amps. The right side tester is for bias current matching of power tubes (also tests for shorts.) The left side tester is to check for emission, transconductance, and leakage. Transconductance is based on the tube spec sheet conditions. It tells me a lot about the working condition of the tube.

This is my setup for adjusting bias on 60's-70's Fenders.

New green tolex and black grill cloth for this Marshall.

Made a custom foot switch for this Sunn and repaired some stuff.

Custom speaker cab for @margaretgarrett_music who has a new album out. Check it!

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CONTACT US

Vernon St Studios

Ground Floor (call if the door with all of the stickers is locked or yell through the window on Central Street next to the loading dock.)

6 Vernon St. Studio 108

Somerville, MA 02145

USA

judgeamps@gmail.com

(617) 863-7351‬

ABOUT JUDGE AMPS

After some years of building and repairing amplifiers for his friends and his own personal use, Bob Judge created Judge Amps in 2019. Bob works out of the Vernon Street Artist Studios in Somerville, Massachusetts.

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CONTACT US

ABOUT JUDGE AMPS