dc power suppy

I'm wanting to drive a home sub with one of my mono block amps from my car system. I understand that I can use a dc power supply to run the dc based amp in my home. I don't know what size or specs I should be looking for in the power supply unit. There are different amperage ratings and wattage ratings. Can someone tell me what size unit I should get? The amp I'll be driving is rated as: 900 x 1 @ 2 ohms. I might even decide to run two of those amps. Is there a powerful enough DC power supply unit out there to do it?

900W out = about 1125W in if the amp is Class D 1125W in, / 14.4V = 78A You will need a DC power supply rated for 75A continuous to run ONE of your amplifiers. They are 1: heavy, and B: expensive by the time you get to ratings like that. Expect to pay at least 200 to 250 for a decent one. Easier, and cheaper? Buy a home power amplifier.It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Much cheaper to get a home amplifier.

400 bux, and 500 watts RMS... That's where I'd go! Here's a 40A power supply. This is a CHEAP one, and half the amount of power you need to run ONE amplifier. Not very economical, is it?It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Yeah, I've looked into it further. Way too expensive. I saw all these 25-45 amp deals for $50-$100 bucks. That's why I wanted to know just how much power I'd need from the power supply. I've got two mono blocks, a four channel and a two channel just sitting around from my last install that are just laying around doing nothing. I build a lot of home audio stuff so I thought...hey why not try this. But like you say, way too cost prohibitive. Thanks for the info!