this was recently posted:
probably a easier alternative
I am working on putting my Car PC in and was looking at different options to amplify the sound. I was looking over at 41hz.com at the AMP9 but see that the price is similar to a few decent head-units I had bought in the past. Plus I would need to install all the components on the board of the AMP9.
My question is, would it be possible to take an old head-unit and remove the amplifier from it? It seems like the board with the components would be small enough and that it would be a very cheap alternative.
head unit I already had or go to a local scrap yard and pick up some for cheap.
It is very unlikely you will be able to take specific parts out of your head unit to amplify things from your PC. You would need to know a lot about the head unit, as well as a lot about electronics.
There are not too many diagrams as to what is what in specific head units that you can reference.
I would say go with the link posted above. It isn't as expensive as the AMP9. The AMP9 is around $100 USD, while the item above is only like $75.
I will probably get one of those myself until I have money to get a real amp and some real speakers.
on sale for $50
Is it possible to put two of these sound cards in a carputer for four channels, or can four channels be used on just one?
you should use two.
also just found this:
is another cheap alternative that can probably be powered of an m2-atx psu
those mini-amps/amp-cards are fine for home computer usage, but will be useless in a car. they're simply not powerful enough. 10-15w will not even match a modern factory radio (if a factory radio can outperform something then you know it's bad!)
unless you're an electronics genius, I doubt you would be able to simply remove the amp from a head unit since it's integrated into the main circuitboard. but you could remove all the "guts" from the HU, remove the CD player mechanisms and mount the main circuitboard (and any other components necessary for the HU to operate) inside your PC case. IMO, this would not be worth the effort but I'm just giving you some ideas.
if you want to use a HU to amp your speakers then just keep the HU in tact and mount it in the glove box, under the dash, under a seat, etc. you don't have to take a HU apart to keep using it, just hide it somewhere
head unit to a fixed position. I think it would either limit his total output (volume on medium), or it would sound really static-like (high volume on head unit, and low volume on PC).
Just get an amp. If you cannot afford an amp..then think about abandoning the car PC idea and just get a regular head unit.