Thomson theater DPL 550ht--no sub roofer output--all other speakers work--have schematic, could be the driver transistor

SOURCE: Subwoofer Connection: Speaker wire to Mono RCA

The easiest solution to use your subwoofer is to buy an amp for it. Any old stereo receiver from a garage sale will probably do just fine.

1. Connect the mono RCA subwoofer output from your Sony with a 1xRCA-to-2xRCA splitter to both the left and right input of the cheap reciever's tape or aux input
   
2. connect both speaker outputs of the cheap reciever to the speaker input on your subwoofer. make sure both black (-) outputs on the reciever connect to the black input on the sub, and the red outputs (+) on the reciever are both connected to the red input on the subwoofer.
3. make sure the cheap receiver's volume is all the way down. turn your Sony up to about the loudest you'll listen to it. turn up the subwoofer amp until it's loud enough to sound good.
4. leave the subwoofer amp alone, the Sony volume will all you ever need to touch from now on.

SOURCE: subwoofer.......

Please check your model number, I can not find it on the JVC service website.

This is a powered sub-woofer I think. You need to have a thick black cord that connects the sub to the head unit. Then the satellite speakers get connected to the speaker jacks on the sub-woofer box. The sub-woofer should also be plugged into an A/C outlet on the wall.

The speaker outputs are labeled right there where you connect the speaker wires. You should see a red and black connector for each speaker and they are labeled "front right" "front left" "center" "rear right" "rear left".

If you do not have the thick black cord you need to connect the head unit with the sub-woofer, you can not use this system.

If you look at the head unit and give me the model number on it, I may be able to find the part you need. But I must have a good model number to work with, preferably from the head unit.

Dave

SOURCE: Home theater system protection kicks out

Nice write-up.

http://www.sherwoodusa.com/pdf/RD-6500(English).pdf

On page 6 of the manual it states you should use a powered subwoofer and the unit provides a sub output on the rear panel for it. The message from the amp kicking out is that you're not going to get away with your workaround.

I would advise you to purchase a nice amplifier (2-channel bridgeable or single channel) for the subwoofer. That way you'd be sending only LFE signals and your receiver has provisions for adjusting its volume relative to the rest of the channels. I use a nice 5-channel Carver for my 3 subs and both Rear Surrounds.

On eBay I see what I would get if I were you - a Carver M-200T (120W x2; 300W bridged). I have one.

http://cgi.ebay.com/Carver-Magnetic-Field-Power-Amplifier-M-200t-120WPC-Amp_W0QQitemZ200327110781QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item200327110781&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A1%7C39%3A1%7C240%3A1318

SOURCE: No sound output from Center and Surround speakers

the only time the center and surround speakers put out sound is when it has a surround sound source such as a dvd etc. and only certain sounds come from them as well.

SOURCE: no output to speakers mackie 808s power mixer

I can hardly even tell what you're talking about because you don't use any punctuation.