Cheap, small 4ch amp Recycled OEM UNIT.
Hello everyone, this is my first post on the site.
I am in the middle of putting a carpc into my 99 jeep grand cherokee.
My setup so far:
Hp mini 110 netbook
7" Lilliput ct70 VGA
cheap ebay BT module works w/ bluesoliel
ELM 327 Bluetooth OBDII interface
TOM TOM II bluetooth GPS receiver
Centrafuse 4.0 Trial (not sure if its staying)
Iguidance for Nav
This post is about sourcing a cheap and small 4ch amp for powering the OEM vehicle speakers.
I was looking around for low power small 4ch amps on ebay, I found a couple that were pretty small, but not quite as small as I liked.
I was poking around in my basement last night and came across my old factory radio from my 1996 grand cherokee, I have since sold that jeep and this radio was just collecting dust so I decided I would pull it apart. What I found inside amongst all the PCB's was a separate 4ch power amp, this was driven by a separate pre-amp which is convenient.
After some signal tracing and figuring out where the power all came from and where it had to go to, I had the unit out and on a bread board.
This amp is small, very small, about 1"h x 1.5"w x 5"l I cut up the heatsink
and screwed the two driver chips to it.
I am testing it with an 8ohm house speaker and the source is coming straight out of a Cheap 4ch usb soundcard from ebay. It sounds pretty good, and is plenty loud.
Here are some pics.
The last one shows the unused bits of the unit.