Amp/Sub Power Rating

[jgruberman 10+ year member]

Now I want to clarify because I don't want to sound like a jerk.

I'm not looking for subwoofer/amp recommendations, just how you think this power matchup would be.

Powering two of these: Polk Audio MM1040 Mobile Monitor series 10" 4-ohm subwoofer at Crutchfield Signature (350wrms)

Ran 2 ohm off of: MB Quart DSC-2150 (dsc2150) - 2-Channel Car Amplifier Power Amp - Sonic Electronix

The amp is rated 300x2 @ 2ohm and the subs are 350w rms per sub. 50 watts short of the rating isn't so bad, is it?

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[jgruberman 10+ year member]

Anyone? Good match between subs and amp?

 

[jgruberman 10+ year member]

Nevermind. I'm gonna stick with those subs and go with the DSC1500.1D for now. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[mtptl77]

First of all, ignore any "max" power ratings, both on the amps and the subwoofers. They have no purpose except to add more confusion.

Ideally, you'd want the RMS rating of the amplifier to be the same as the sub's RMS rating. You can use a much lower power amp without a problem; subwoofers aren't damaged by under-powering. You can use a slightly higher powered amp, but you'll need to be more careful.

With your 400-watt RMS sub, you can use anything from a 50-watt to 450 watt RMS amplifier.

Be sure to match the impedance ratings of the sub and the amp. Most amps produce more power at 2 ohms than at 4 ohms, so if you have a 4 ohm subwoofer, make sure you're looking at the right power rating. Also, make sure that the amplifier's power rating is CEA-2006 compliant. This means that the power rating method conforms to a universal standard, so you don't have to worry that it's over-rated.

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