New user - some Carver questions

Hello, glad I found this site after all these years!

I have a pretty modest system

Onkyo 7 channel 730 HT receiver
Carver 5x100 HT power amp
Polk 12A mains
Polk 300 center
Sunfire Sig Sub - with bad amp hum, not using needs fixing. bought used, worked good for a while.
JBL 12" sub w/o amp, was given to me by the guy selling Onkyo receiver
Awia cassette deck
Sony CD changer
generic DVD
HD tuner
Hitachi 54" rear projection TV

I can't get the sunfire sub to work w/o a bad hum. I used to be able to bang on the top of it, and it would go away, but now it happens so much I disconnected it. I tried disassembling it and looking for cold solder joints on the circuit board junction, but did not get it working. Any suggestions?

Anyway, I see many BASH type amps on the market, are they using a licensed version of the Carver tracking amp technology?

I also have an older Carver 1000 receiver that has excellent sound but some issues with bad analog dirty switches and the AUX seems blown. But the sound was so much better than my old Sherwood AV receiver even in preamp only mode, I eventually gave up on the Sherwood. Wish I could afford the sunfire or something like it now.

Welcome to the forum.

Welcome

Welcome! That's a very nice sub and worth fixing. I'd send it to Rita's Vintage Audio for a complete rebuild. Good luck!

http://www.ritasvintageaudio.net/index.html

BillD had a similar problem & fixed it bt (I think) cleaning & tightening the connections (not soldered).

Worth a try.

Welcome to the forum ...lots of good folk to help you here!!!!!

You need to tighten everything down (that sub shakes everything loose over time, and your being able to bang it to make it quit is an indication of a loose ground). Especially, tighten the locking nuts on the potentiometers. Take the pointer caps off and tighten those nuts down tight. See if that helps.

BillD had a similar problem & fixed it bt (I think) cleaning & tightening the connections (not soldered).

Worth a try.

Hey, maybe I'll try that again. Been backed up on projects lately, had bees in the side of my house and need to nail stuff back up there after digging them out, accessory driven noise in my van engine (already replaced ps and alternator bearing), etc.

I am thinking of ordering a 240w Dayton or 300 class D Bash amplifier from parts express for the JBL sub, I have tried using the carver receiver's left channel pre=in but it lacks volume. I drove it with another receiver (actually the Onkyo so I can't really use that now) to test and it does pound good, not a problem with sub. those amps are not 'high end' but I'm on a budget lately with my commission based job.

Scott

Welcome