So I've been in need of a project for a while, and my pocketbook isn't going to allow me to just start buying cool components and making an ideal setup. That said, it is easy to "nickel and dime" my way (my wife " id="yui_3_7_3_1_1356389317398_1057" rel="http://files.head-fi.org/images/smilies/wink.gif">) into something workable.
In case the voltage and amperage in the title didn't make this thread a dead giveaway, I want to use my car audio equipment to provide bass to my computer system. I have an older Infinity Kappa Perfect 10" subwoofer and a couple boxes I made out of 3/4" MDF - one sealed, one ported. Also, I have an Alpine MRP-M400 amplifier that makes it sound just ever so nice.
I'd like to make a 13.8v (really, 12-14 is ok) power supply capable of providing around 50 amps. I can use capacitors to smooth out the load if it winds up peaking higher than that, but I think it should be sufficient. (13v * 50a = 650w) I've done a lot of various DIY before, but I have yet to design and build an IC. I have repaired them and understand the overarching goal but I'd like to do something like this which is a little more than I've had experience with. Doesn't need to be regulated super well since car electric systems sure aren't, but 120v ac obviously won't do.
Don't worry about the line voltage implications and all that, I'm a big boy and I've wired buildings to code, both high and low voltage: I've also been electrocuted and I have a healthy respect for the little electrons.
It might sound terrible, but at worst I'll gain the experience of building a power supply and come away with a good piece of testing equipment for car electronics accessories!
So what I'm looking to you fine folks for is advice: What's worked for you? Are there any better plans out there for what I want to do (maybe with components marked more clearly)? Is it worth digging into my heap of computer power supplies for components? Can I meet this power goal without needing a fan? What am I not considering here?
I'm not 100% married to the 50a idea. It's what would be needed if I were to use my existing 12v amp though. 400-600 watts is not so astronomical for a subwoofer, but 50a admittedly is a lot of current in a domestic setting. I was actually thinking about nixing this whole idea in favor of an XLS-202, but I'd still rather build my own amp. I'll change the title, as it's looking like my project has evolved. Sanity has sunk in too deeply for me to continue with the big 12v supply.
What I want to do now is build a 110v amplifier: Just a simple monaural output, targeted at driving an Infinity Kappa Perfect 10 vq. Should be around 400-600 watts (RMS). What's an easy circuit that offers good quality and high output? Also, I'd like to have cake and eat it too. :-) Is it possible to do this for under $200?
Edited by xfinrodx - 12/25/12 at 6:15pm