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Re: Need help with subwoofer hookup for 99 540 w/D (archive)
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Posted by Andy on June 18, 2001 at 07:49:51:

In Reply to: Need help with subwoofer hookup for 99 540 w/DSP posted by chogan on June 17, 2001 at 21:09:52:


Some answers below your questions

1. The sub amp accepts RCA inputs - where should this be coming from? Which wires?
You need an amp that will take speaker level inputs not RCA. There are some speaker level to RCA converters on the market but in my experience the sn ratio with these is terrible.

2. Is a crossover necessary to filter out the higher frequencies from the sub?
The output from the DSP to the 2 Nokia subs is filtered by the DSP so no crossover is required (someone correct me if I'm wrong)

3. Can I leave all other existing speakers hooked up as is?
yes

4. Should I connect the positive from the amp directly to the battery (with a fuse in between)?
you should place a fuse of appropriate rating between the amp and the battery. Make sure you use nice 2 or 4 guage cable if you don't want to set fire to that nice bimmer. You will also need to take a feed for the amp switch from something else that is switched by the ignition.


Any additional tips and/or pics would be greatly appreciated.

Thanks for your help.

Chris



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