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The Acoustic Club

Here is my ACC collection. Been using the 450+300 booster or two 300 boosters with a Subway 800+ preamp at gigs and loving it. I found the 370 recently in my local area for super cheap, but it sadly needs an overhaul as it isn't putting out much power.

Some questions for 320 users. I got mine from someone who took it to a tech for an overhaul (caps,resistors,transistors). Upon playing the amp, it sounds rather grindy and I can sometimes hear a slight fizzle trailing off the notes. I also need to use the pads to keep it even remotely sort of clean. The EQ has a weird phase/cone filter effect going on when I play A/B it to my other amps. Not sure if this is just how these amps sound normally, but I was under the impression the 320 was the cleanest ACC amp of the original run of the company. Even compared to the 450 this 320 doesn't sound very clean. Perhaps there was a calibration or bias step that wasn't done? Power amp sounds great ether as slave for the 450 or 800+
 

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Here is my ACC collection. Been using the 450+300 booster or two 300 boosters with a Subway 800+ preamp at gigs and loving it. I found the 370 recently in my local area for super cheap, but it sadly needs an overhaul as it isn't putting out much power.

Some questions for 320 users. I got mine from someone who took it to a tech for an overhaul (caps,resistors,transistors). Upon playing the amp, it sounds rather grindy and I can sometimes hear a slight fizzle trailing off the notes. I also need to use the pads to keep it even remotely sort of clean. The EQ has a weird phase/cone filter effect going on when I play A/B it to my other amps. Not sure if this is just how these amps sound normally, but I was under the impression the 320 was the cleanest ACC amp of the original run of the company. Even compared to the 450 this 320 doesn't sound very clean. Perhaps there was a calibration or bias step that wasn't done? Power amp sounds great ether as slave for the 450 or 800+
The trailing fizzle thing reminds me of problems I was having with one of my 120s. The problem turned out to be the on/off rocker switch. It was strange though, because it seemed to be causing other strange issues with the amp, maybe because it wasn't making a clean connection, but either way, I wired it out and the amps fine now. I just have to use a power strip for my power switch.
 
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There's a 360/361 rig for sale (with a nice wine casing), and the guy says it turns on and lights up, but no sound is coming out. He doesn't know much about it since he bought it that way and never tried to fix it. I know it could be a lot of things, but he's asking about $900 usd ($1200 cad), which seems a bit steep for something non-functioning, even if it is one of the most coveted vintage bass rigs ever. It could be a $50 fix. Could also be a $500 fix.
ACC 360 f.jpg
360 b.jpg
 
Just picked up this supposedly not-working 150b.

View attachment 4897352

Guy I got it from had it as a project he never worked on, only thing he knew about it was that it didn't work.
:)

they're pretty easy to fix. i've repaired a lot of them and i dig 'em.
 
Just picked up this supposedly not-working 150b.


View attachment 4897352


Guy I got it from had it as a project he never worked on, only thing he knew about it was that it didn't work.

Threw it is with the purchase of the (also not-working) Peavey Mark III it's sitting on.



:)
Repair them both. I had 2 of those Peavey heads. I'm very surprised it doesn't still work!
Very good deal!
 
Just picked up this supposedly not-working 150b.


View attachment 4897352


Guy I got it from had it as a project he never worked on, only thing he knew about it was that it didn't work.

Threw it is with the purchase of the (also not-working) Peavey Mark III it's sitting on.



:)

they're pretty easy to fix. i've repaired a lot of them and i dig 'em.

I have fond memories of the 150b.
My first real bass amp to play through even though it wasn't mine, it was the lead guitar player's.

It was that head with a 402 2x15 cabinet and I was playing the DJ Bebop P Bass of Doom in my first real band, The Reef Aires.

Good Times!

:)
 
they're pretty easy to fix. i've repaired a lot of them and i dig 'em.

I'm looking forward to digging into both of them to see what they need ;)

Repair them both. I had 2 of those Peavey heads. I'm very surprised it doesn't still work!
Very good deal!

The amp I use the most is a Mark IV - it'll be interesting to compare the two once the Mark III is working again.

The PO gave me some parts he had bought for it; it could be those, or maybe capacitor issues, or a bad jack, or....?

Figuring that out is the funnest part :)
 
Just picked up this supposedly not-working 150b.


View attachment 4897352


Guy I got it from had it as a project he never worked on, only thing he knew about it was that it didn't work.

Threw it is with the purchase of the (also not-working) Peavey Mark III it's sitting on.



:)

Discovered why the 150b didn't work.....

20221209_041547.jpg



....putting in a new, modern replacement (and a new fuse holder) brought it back to life :thumbsup:

20221224_113714.jpg





It's still not at 100% functionality, the volume won't turn all the way down, on either circuit.
So, a bit more troubleshooting needed, when I get a chance to work on it some more :)