How can i hook up a subwoofer to an audio reciever with no subwoofer output?

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Andrew Welsh asks:

I purchased an audio receiver from amazon (Sony STR dh100) that only had 2 channels. Much to my disapointment, I realized that I could’nt hook up a subwoofer. Is there anyway I could hook up a subwoofer that would receive the low level frequencies? In other words could I hook up a subwoofer and have it function properly?

Best answer:

Answer by Kevin L
The only way of hooking up a subwoofer to your speakers is passively from the receiver’s speaker outputs to the subwoofer and then to your main speakers. If its a active subwoofer, no you cannot it does not have ether a subwoofer or main pre- outputs.

Kevin
40 years hi-end audio video specialist

One thought on “How can i hook up a subwoofer to an audio reciever with no subwoofer output?

  1. Yes. The trick is getting an active subwoofer that has speaker level inputs. Typically it will have two sets of speaker terminals – IN and OUT. The IN will come from your Sony STR dh100 speaker outputs. The subwoofer will not use the receiver’s output power to drive it directly but will direct a tiny amount of current to it’s pre amplifier / crossover / power amplifier and will mix the two channels. The OUT will go to your main speakers in an unmixed state but, in some cases, after a high pass filter.
    Here are examples of such a subwoofer:
    http://www.parts-express.com/pe/showdetl.cfm?Partnumber=300-635
    This firm also sells subwoofers in kit form if you are interested in DIY.
    Here’s one from Yamaha:
    http://usa.yamaha.com/products/audio-visual/speaker-systems/subwoofers/yst-sw216_black__u/?mode=model

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