| Main > Main Forum |
| Pc power suply to power car amp? |
| << < (4/4) |
| Wade:
The whole idea of using a car amp in a game cab just seems a little ass-backwards to me. Don't most PC power supplies only have a max of 1 or 2 amps on the 12V output? My relatively low wattage sony car amp (I think it was about 60) had a 20 amp fuse in it. That alone told me that it was likely too much for a PC power supply. I tried it, and it works, but the power supply cuts off if I turn up the volume much. Seems it would be far more appropriate to either hack a set of good PC speakers (I have some that I paid $30 for years ago, which sound much better and louder than the car audio setup I tried), or even using a standard 120V AC amp (even better results, I'm sure). Wade |
| btoddkelley:
I have a 400 ps in my upright cab that has been powering a 35 X 2 Alpine car amp for 4 years. It also powers the motherboard! (amd 2500). Alpine amps a class A operation (This does not means sound quality, it is how the ouptut circuits are put togather) which are more ineffecient than a class AB. Class AB is the most common in car amps. At normal volume levels (which I do not know why anyone would exceed in a cab!) you would need about 85-90db. Most car speakers have a sensitivity of 87-91db at 1watt\1meter. Translation: It is unlikely the amp will ever draw more than about 2 amps. If you were to push the car amop to maximum smoke (just under clipping of the outputs) It would then draw the maximum found by ohms law earlier in the thread. Maximum output on a cab would put you about 6 inches away from the speaker. Sound energy falls off at the square of the distance. (inverse square law). 2 speakers with 87db sensitivity 1W/1M would be putting out 93db. at maximum smoke they would be putting out about 106 db. That is REALLY LOUD! :) Todd |
| Redseven80:
Thanks guys for the valuable info, the reason I'm using a car amp is that I'm using it (single channel bridged) to drive the sub under the seat and PC speaker amp to power the regular speakers L&R channels. I want this thing to thump, and I will also receive an ass massage at the same time..... |
| richms:
Does the seat have the adjustments on the seat and just need power, or were they somewhere else on the car that they came out of and you are having to hook into the motors directly yourself? |
| Navigation |
| Message Index |
| Previous page |