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Old November 4th 05, 11:01 AM posted to uk.rec.audio.car
Jon
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Posts: 14
Default JBL 75.4 Amp + Where to put Nokia Car Kit / mute lead??

Thanks for the quick reply... Please see below:


The question is where to I put the mute lead / box for the car kit?
Can I simply take the wires that go from the amp to the speakers and
put the mute lead in the middle or will this damage the mute relay?


If you're using low level input, it'll need to go between the amp and
speakers. You'd need to check that the mute lead either isolates the
amp outputs by relay, or that it's of sufficiently high power
capacity. If it's not, you could achieve the same thing yourself with
a couple of relays.


The mute lead works by relay - when it cuts in/out you can definately
hear it clicking. So based on your reply I guess it should be OK.


Also, if I only use 2 speakers (its going in a Landrover so no
brilliant sound system!) what is the best way to utilise the amp -
should I bridge or just use 2 channels, leaving the other 2 empty?


Bridging it will give it more power, effectively increasing it's
damping factor at lower volumes, so I'd do it that way - just make
sure the gain controls are set in a way which prevents excess power
going to the speakers.


Sorry to be thick, but what is "damping factor"?

Thanks
Jon