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Hooking up sub

Hi, I'd like to hook up a powered sub (Energy ES8) to an older Technics HT receiver. There is no sub output on reciever. I was told not to use the "B" speaker hookup as this could screw up impedence. I was thinking, could I hook up to tape RCA outputs Get an adaptor that merges the L+R into one RCA cable since normal sub output is mono anyway? If not what would be the best way to do this? The sub is powered and has a volume control and a crossover selector knob. By the way will be using 6 speakers, the front and rear L+R, center and the sub, all Energy speakers.

Thanks,
Tom
tommage
kr4's avatar
kr4
3,424 posts
 
1. Tape out is not volume-controlled, so the sub level will not track the main speaker level if you do this.

2. If you do not have preamp outputs, you must use the speaker output.

Kal
reubent
3,587 posts
 
Tom,

What model is the receiver? If it is an HT receiver which supports mains, surround and center speakers, I'd be surprised that it doesn't have some type of sub output. Are you sure there is not an RCA out for "LFE" (low frequency effects), which is sometimes what the sub out is called on an HT receiver.

Does your receiver support Dolby Digital 5.1 surround sound? If so, it must have a sub out of some kind.

TIC
sanjose_audio_guy
28 posts
 
There is another way to hookup sub from front/left channels if your sub backside has speakers hookup and you might have to buy extra speakers cale. Connect speaker cable (SC) from LF front speaker from receiver to input subwoofer speaker connectors. And output of subwoofer Speaker connectors to your front LR speakers.
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