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amp wiring / common ground / mono sub out
amp wiring / common ground / mono sub out
I have an Alpine CDA-9812RB, with stereo sub pre-out, and AFAIK no
provision for switching to mono out. 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.
I have an Alpine CDA-9812RB, with stereo sub pre-out, and AFAIK no
provision for switching to mono out. 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.
Re: amp wiring / common ground / mono sub out
In article <54295c48-f27b-4073-930b-f4a6b02946ce@m36g2000hse.googlegroups,com >, fishjam@gmail,com wrote:
>I have an Alpine CDA-9812RB, with stereo sub pre-out, and AFAIK no
>provision for switching to mono out. 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?
Stereo sub makes no sense. You want to minimize problems by using mono
sub or select either channel and drive the sub with that. Good luck with the wiring.
It might work.
greg
In article <54295c48-f27b-4073-930b-f4a6b02946ce@m36g2000hse.googlegroups,com >, fishjam@gmail,com wrote:
>I have an Alpine CDA-9812RB, with stereo sub pre-out, and AFAIK no
>provision for switching to mono out. 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?
Stereo sub makes no sense. You want to minimize problems by using mono
sub or select either channel and drive the sub with that. Good luck with the wiring.
It might work.
greg
Re: amp wiring / common ground / mono sub out
<fishjam@gmail,com > wrote in message
news:54295c48-f27b-4073-930b-f4a6b02946ce@m36g2000hse.googlegroups,com ...
>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.
<fishjam@gmail,com > wrote in message
news:54295c48-f27b-4073-930b-f4a6b02946ce@m36g2000hse.googlegroups,com ...
>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.
