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Power source for car amp - Page 2

post #11 of 17
One other thing to consider is that car amps were designed to run at 14.4v since that's the voltage that all car alternators regulate to. If you are only running 12v you won't be able to get it as loud. I would recommend going with a bench quality adjustable voltage power supply.
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post #12 of 17
I tried to PM you bobfig but I can't, and i'm not trying to jack this mans thread.

But that little amp is something wicked. This has piqued my curiousity as I have a 12" boss sub lying around collecting dust.

Can you explain to me how I can tie that into my Logitech G51 surround sound speakers?
    
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post #13 of 17
Well, this is a possible thing to do. Check my sig, I've got a how to .

BUT....I wouldn't recommend you to use a GOOD PSU for this. That's a very bad idea. If this is for a more permanent situation, I'd advise you to check out partsexpress.com, and check out a dedicated plate subwoofer amp .
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post #14 of 17
Quote:
Originally Posted by Deism View Post
I tried to PM you bobfig but I can't, and i'm not trying to jack this mans thread.

But that little amp is something wicked. This has piqued my curiousity as I have a 12" boss sub lying around collecting dust.

Can you explain to me how I can tie that into my Logitech G51 surround sound speakers?
bahaha lol ok idk if that will work with that g51 may need to hack the sub wire to send the signal to the plat amp. i relay have this running off a home theater in a another room. its set up as those 4 red knobs and 4 black knobs are the high inputs/outputs to the amp. 2 red and balk are input and the others are out. its like a pass through so the amp reads those signals and amps them to the sub woofer. or next to those is low inputs (RCA's) the amp can amplify that and send it out. you still need a left and a right channel to run it.

so i think you can just use 2 subs the one that comes in the g51 and when the output from there goes out to the front left and right have them pass through there then to the speakers.

edit srry i was late i was busy trying to woot off bahaha
post #15 of 17
yes people hook up car audio to computer psu's all the time.

go on caraudio.com idk why ur asking people on here..
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post #16 of 17
Thread Starter 
Quote:
Originally Posted by bobfig View Post
yes its been known that people use computer psu's to power car amps but the question is how long u can have them last... it would be easier for you to just git one of these and put it in a separate box.

http://www.parts-express.com/wizards...TOKEN=52486508

i have this one powering a 10" mtx sub in my house and works really good
http://www.parts-express.com/pe/show...number=300-805

BTW that 10" sub shakes stuff halfway across the house

That's what I was looking for in the first place, but I have a 150W 15" and two 300W 12" subs (RMS) so I'd need a 750W amp right? (I'm still new to this whole car audio scene) and the only one listed on parts-express that has enough wattage is the 1000W which is $350. I don't really want to spend $350 on an amp right now, especially since I already have an amp, i just need something to power it.

So my idea of using a capacitor to smooth out the load on the 12v rail and some fans or resistors or something to occupy load on the 3.3v and 5v rails wont work?
    
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post #17 of 17
What size room are you talking about here?

I would think that your two 12"s would be way more than enough for most any space in a typical house. I'm going to throw out a third option for you, other than plate amps or trying to find a 14.4v supply. You should give some serious consideration to using a decent quality pro power amp, as this will give all the power you're looking for without the hassle of building a plate amp into your box or trying to screw with external power supplies and capacitors. A very reasonably priced unit that has no fans to generate noise is the Behringer A500. It is good for 2x230w at 4ohms and bridges to 500w at 8ohms, and can be found for about $170 new.

Here is a link to a thread on AudioHolics where the amp was subjected to a pretty rigorous test routine. Later on in the thread there is a lot of into about people using these to drive high-end home theaters.
http://forums.audioholics.com/forums...ad.php?t=17004
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