Im building a sub box and would like to add some L.E.D's behind some frosted plexi glass. Is it possible to wire them to the amp? That way they will turn onwhen the amp turns on. Its only going to bea 6 l.e.d strip.

 

Definately! Just make sure you get the right resistor for the job.

To get needed resistance use this: (supplied voltage - LED voltage)/LED rated mA * 1000 = resistance needed.

(example: a 1.5v LED with a required amperage of 30mA running on a 12 v supply would need a 350 ohm resistor: (12v-1.5v)/30*1000=350 so grab the closest resistor which is 390.

You can also look here, http://led.linear1.org/led.wiz ,they have a niffty calculator and wiring diagrams.

 

Dont wire them to the amp. Wire them to a relay that is inbetween your HU and amp connected to your remote turn on wire.

 

I'll second what bobditts says. You don't wanna run the chance of fire or anything with that stuff. Besides, using a relay isnt hard at all.

 

it possible to get a quick diagram just to have a clue on what im doing? Also is there a certain relay you would recommend?

 

Ok, so a relay is very easy to install. You can pick up an automotive one from Advance Auto or some other store for about $3-$5. Nothing special about them really. The one I have is a "40 Amp relay for aux. lights and horns". So, when you get your relay it will have 4 pins on the bottom. they should each have a number beside them. Mine were 30, 85, 87, and 86.
#30- terminal for ACC
#86- Terminal from switch (or in your case the power line that you want the lights to come on with)
#85- Ground
#87- To battery/12 V source

So basically, you connect terminal #30 to the positive of the LED's. You connect Terminal #86 to the line that you want the lights to come on with. I have no idea about amps and their wiring so someone else will have to tell you which wire. Connect #85 to ground. And connect #87 to a 12 V source. Hopefully that helped enjoi

 

(borrowed this from the12volt.com)

Connecting Additional Devices to the Remote Turn On Wire

Using a 30 amp SPDT relay, connect terminal #87 to constant 12 volts positive with a fuse rated to the sum of the additional accessories you've added and the components you need to turn on. (If you have two fans rated at 5 amps each and a neon light rated at 10 amps, you would use a 20 amp fuse plus 200 ma for each amplifier and processor.) Connect terminal #85 to ground, terminal #86 to the remote turn on wire from the head unit, and terminal #30 to each accessory with an appropriate fuse. A fuse (not shown) could also be used between the output of the relay (#30) and the remote turn on wire of the amplifiers and/or processors for extra precaution.

 

Great info! Everyone thanks for the help .