jumbodogs

I am getting this popping sound from speakers when I shut down the computer in my truck. I am using the rem wire on my M2-ATX to power my amps on.

jontz

I'd power your amp turn on lead with something other than your opus, something that turns on with the accessory position on your ignition. When you turn the key off, your amp will turn off instantly, while your mobo will take a few seconds to power down, eliminating your turn off thump.

jumbodogs

I thought M2-ATX was suppose to take care of that thump.

tacobandit

Did you ground the other pin?

jumbodogs

No I did not .... should I?

danielkh

Follow this thread. It works flawlessly for me. The M2-ATX never worked right for me.

http://www.mp3car.com/vbulletin/car-...-carputer.html

jumbodogs

Hey thanks I am gona give that a shot.

tacobandit

Okay i guess i am confused on what they actually did, do they still use the m2 to turn on the amps? Or from the computer?

danielkh

They are using a program in windows to turn the amps on and off by using the serial port. You do not use the m2 at all for amps.

tacobandit

Okay so how do you wire up the amp to do that?

danielkh

There is a lot of info on this in the forum, but in a nutshell....

1. Download the amp control program.
2. Find an old serial cable and cut it open.
3. With the program, turn on and off the "amp" (in the program)
4. Find which wire is putting out 12V when turned on (think this is called the dtr pin)
5. Run that wire directly to the "amp on" of the amps
6. Setup .bat files as I describe in the other thread

Done!