<fishjam@[EMAIL PROTECTED]
> wrote in message
news:54295c48-f27b-4073-930b-f4a6b02946ce@[EMAIL PROTECTED]
>I have an Alpine CDA-9812RB, with stereo sub pre-out, and AFAIK no
> provision for switching to mono out.
Your description is kinda of funky. Like Greg S said, stereo sub makes no
sense as low frequency sound is non directional. If what you said is
indeed
the case, use a "Y" connector from the "stereo" sub preout from the Alpine
to the mono amp and be done with it.
Use this from the HU
http://www.amazon.com/Pyle-RCA-Y-Connector/dp/B0013VH3SM/ref=sr_1_2?ie=UTF8&s=audio-video&qid=1208028280&sr=1-2
plus a long RCA mono connector to the amp.
I have a bridgeable mono amp for
> a sub that I'm going to fit in the rear of the car, and fortunately
> the battery is under the rear seats.
> I'd like to use the existing rear speaker cables for pre-out signal
> plus switching.
> Question is, should I just use one channel of the HU sub out, or can I
> sum the grounds of the pre-outs and use three of the four speaker
> cables to carry the stereo sub signal? Is this necessary (LF being
> primarily mono) & does it carry a risk to the HU?
> TIA,
> J.
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