Switchable power?
11-11-2006, 05:03 PM
#1
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Switchable power?
I am finally to the point where all I have to do is wire in my amp, but I don't know where to find a switchable power source, is there one in the hatch area?
11-11-2006, 05:23 PM
#2
Gluteus Maximus
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I don't think you're going to find anything suitable - you'll need to run one.
Depending on the size of your amp it'll draw a fair amount of power, so you shouldn't piggyback it on something else - that's the formula for blown fuses and burned wires.
Most decent amps have a power input that's seperate from the switching input. And your head unit should have a amp switch output - so the amp comes on only when the head unit is on.
The power you can take straight from the battery (with suitable fused protection).
Depending on the size of your amp it'll draw a fair amount of power, so you shouldn't piggyback it on something else - that's the formula for blown fuses and burned wires.
Most decent amps have a power input that's seperate from the switching input. And your head unit should have a amp switch output - so the amp comes on only when the head unit is on.
The power you can take straight from the battery (with suitable fused protection).
11-11-2006, 05:42 PM
#4
Racer
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You should have three connections for power on your amp...
+12v Should go directly to the battery via a suitable fuse.
Remote turn on should be connected to either the power antenna or accessory turn on wire of your head unit.
GND - Obvious.
If you really do need a switched supply, wire in a relay from a switched supply and take power straight from the battery, again with a suitable fuse!
+12v Should go directly to the battery via a suitable fuse.
Remote turn on should be connected to either the power antenna or accessory turn on wire of your head unit.
GND - Obvious.
If you really do need a switched supply, wire in a relay from a switched supply and take power straight from the battery, again with a suitable fuse!
11-11-2006, 05:55 PM
#5
Gluteus Maximus
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You can splice into the head unit's switched power for switching the amp off and on (blue wire below) - all that means is that the amp will stay on even if your head unit is off. But you shouldn't use that to power the amp, unless it's pretty small (and what's the point of a small amp?).
Your head unit should have an out for turning the amp on and off. Older head units have an output for a powered antenna which you could use - although sometime they're only on if the radio is on, not the CD.
Your head unit should have an out for turning the amp on and off. Older head units have an output for a powered antenna which you could use - although sometime they're only on if the radio is on, not the CD.
11-11-2006, 05:56 PM
#6
Nordschleife Master
Ben is correct: run an ON wire when pulling the audio lines.
Nice of Porsche to mount the battery where my power amp went. It's screwed to the back of a plywood tire hole cover. Dual 10" subs, dude.
Nice of Porsche to mount the battery where my power amp went. It's screwed to the back of a plywood tire hole cover. Dual 10" subs, dude.
11-12-2006, 01:36 PM
#7
Three Wheelin'
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Originally Posted by whitefox
So I shouldn't splice it into the head units switched power?
Tapping into another switched source in the back (like antenna) can cause a ground loop issue, adding noise. Best to take the time to run the blue wire with the RCA cables to the amp.