what amp do i need for 2 500 watt subs at 2ohm?

Answer 1

An amp rated for 500W @ 4 ohm with a minimum load of 2 ohm. But if you want it sound worth a damn, you'll need to know more. I assume you're talking car audio which is all ~12V. If so, to parallel wire speakers into a single amp provides the same wattage to each speaker but divides the resistance (ohms). Since I don't know you I have to explain parallel vs. series wiring. Series is __-0+__-0+__ and parallel is === ++00-- ===. (0 is the speaker + or - is the speaker connection ___ is a single wire from the amp and === is two wires from the + and - terminals. Meaning 1, 4ohm speaker wired to a 500W amp yeilds 500W @4 ohm, 2 wired parallel yeilds 500W each @ 2ohm or 125W ea. @ 8ohm when wired in series. If an amp could handle the "ohm drop" you could theoretically wire 32 4ohm speakers in parallel and drive each to 500W (at 1/8 ohm on the amp) Got it? So, assuming you didn't get that at all, try this..
Instead of spending money on an amp (just for now) spend $5 on a harbor freight multimeter. Check resistance (ohms) on your speakers in various wiring configurations. You may not know but it is possible to focus wattage and even frequency (crossover) with nothing more than speaker wire AND (you probably do know this) it is easy to permanently damage your system by short ohming it. Then you'll need to harmonize your enclosure cause we all know that resonance is a *****...when it works right.

Answer 2

DO NOT get a bigger amp and adjust the gain incorrectly.

First off, we need to know the watts RMS of each sub and how your coming up with 2 ohms. Are the speakers already wired in parallel?

You really are lacking in information for anyone to give you a real answer.

E-mail me with the full spec of the subs you have and I'll get you on the right track.

[e-mail]

Answer 3

if that wattage is the peak for the subs, then most of the time the rms is 1/2 that. so you need a 250x2 @ 2ohm amp. if 500 is the rms you would need a 500x2 @2 ohms.

Answer 4

Watt = I^2( Amp)*r(ohm)

or 2500 = I^2 * 2
or I^2 = 1250
or I = 35.35 Amp

Answer 5

it depends on what sound you want ...just remember always go bigger and turn the gain down ...it will be a lot more clear than a small amp with the gain up ....go with about a 800 watt or better 2 channel if there dual voice coil and 1 channel if there single voice coil

Answer 6

At least 2000 Amps. =ohms law.