Pioneer VSX-D607S Receiver Logo
Anonymous Posted on Feb 21, 2010

Receiver cannot recognize subwoofer

My subwoofer was one component of a Sony home theatre system, and was connected to the receiver with 2 wires like all other speakers. I replaced the receiver with a Panasonic receiver and connected all speakers to it, and all work except the subwoofer, which on the Panasonic needs to connect via phono (single) jack. So, I connected the 2 speaker wires to a phono male jackand plugged into the receiver but the subwoofer would not work. I tried to switch the connection of the wires to the phono male jack, but that did not help. I tyried to connect the subwoofer to the old Sony receiver and the sub worked. Any advice??
Thanks, Dan

  • Anonymous Feb 21, 2010

    1. Mistakenly I posted the message under Pioneer receiver. The problem is with a Panasonic SA-HE100 which I have had for about 3-4 years (NOT a home theatre in a box). I had previously connected 2 floor stranding Aperion speakers. Now I wanted to have surround sound so I connected also 3 speakers I had received about a year ago as part of a Sony home theatre in a box model HT-ddwg700 (5.1). I connected a center speaker and the surround speakers (R and L). All of that works well. I connected the subwoofer from the Sony to the sub out of the Panasonic (I connected the 2 wires from the sub to a single phono jack, because this is the type of connection I have on the Panasonic for the sub (The other speakers have all 2 wires which connect into a red and black on the receiver). The subwoofer does not work!

  • Anonymous May 11, 2010

    Can you just identify the make and model of each piece if this puzzle and if it was old or new and what works/doesn't work with what? I see one model number Pioneer VSX-D6075 but nothing else. The fact that you're modifying phono-style subwoofer connectors is troubling. The manufacturers make them other than bare wire for a reason. Home Theater in a Box components don't usually mix well with 'real' separate components. Speakers are typically very low in impedance for one thing and the ysually have explicit warnings against mix n' match..

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  • Master 8,546 Answers
  • Posted on Feb 21, 2010
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As I implied earlier, take a clue from the physical style of connectors for both parts of the subwoofer function in the old and new receivers:

RCA connections are for Line Level signal between components only.

The input (bare wire) at the speaker is for AMPLIFIED signal.

You can't just modify one to fit the other and expect magic to happen. Be glad you didn't do it the other way around and modify an amplified (speaker level) outout into a Line Level input. You likely would have smoked that component.

Your subwoofer is a passive speaker, that is, like any other speaker it needs an amplifier. Many subs are self-powered (amp built-in) and they would mate well with the RCA sub output of the receiver.

Get yourself an Active (self-amplified) Subwoofer and run UN-MODIFIED RCA cables to it, according to its instructions, from the Sub Out of the receiver. Or get an amplifier between your receiver and the sub you have.

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