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In Reply to: RE: "Output to subwoofer" won't put out... posted by sanman on December 10, 2010 at 07:27:10
The RCA output is at line level and the lash-up sub needs an amp to drive it.
Kal
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Yes, check Parts Express or similar to add a low cost subwoofer plate amp to add to your DIY sub. One that produces 50 watts should be fine, and they should be in the 50-$75 range.
Modestly priced receivers that come with speakers often have the sub amp built into the receiver. I have a an inexpensive 5.1 Sony set up that way. http://www.sonystyle.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10510551&storeId=10151&langId=-1&productId=8198552921665061026
But oddly more expensive receivers do not do it that way. They are made to drive a self-powered sub.
The majority of subs are powered and that complements the fact that the majority of AVRs provide line-level outputs for them.
Kal
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