Amp power to subs

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=53898
Printed Date: November 06, 2025 at 9:48 AM

Topic: Amp power to subs

Posted By: nismo350z
Subject: Amp power to subs
Date Posted: April 14, 2005 at 9:55 AM

Its finally Here! after being on back order for months my Infinity REF 1211a amp is here! Now i need some advice on what to do Heres the specs on the amp

CEA Rated:	Yes
Power Output:	854 watts RMS x 1 channel at 4 ohms and ¡Ü 1% THD + N 1300 watts RMS x 1 channel at 2 ohms, 14.4V supply and ¡Ü 1% THD + N
Signal-to-Noise Ratio:	72 dBA (reference 1 watt into 4 ohms)
Dynamic Power:	1516 watts at 2 ohms
Effective Damping Factor:	6.357 at 4 ohms
Frequency Response (-3dB):	17Hz to 302Hz (-3dB)
Maximum Input Signal:	5.7V
Maximum Sensitivity:	260mV
Output Regulation:	.132 dB at 4 ohms
MSRP U.S. $:	$574.95

Heres the Specs on the 10" Perfects im hooking it up to ( I have two). This rating is @ 4 ohms

Power Handling, RMS:	400 Watts
Power Handling, Peak:	1600 Watts
Sensitivity:	90dB
Frequency Response (¡À3dB):	25Hz - 400Hz
Mounting Depth:	6-1/2"
Impedance:	2 or 8 Ohms depending on wiring

Should I hook it up 2 ohms or 4 ohms to this amp? Would it over power the two 10" that i have if I hooked it up 2 ohms? Would it be better SQ @ 4 ohms?

Replies:

Posted By: kfr01
Date Posted: April 14, 2005 at 10:39 AM

4 ohms. You have absolutely nothing to gain running at 2.

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New Project: 2003 Pathfinder

Posted By: sedate
Date Posted: April 14, 2005 at 11:17 AM

What? kfr01 he can't hook them up at 2-ohms.

Nismo350z:

Your only wiring choice is 4-ohms.

posted_image

That amp should pound those *very* nicely.
Perfect 10VQ's? Nice choice.

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"I'm finished!" - Daniel Plainview

Posted By: kfr01
Date Posted: April 14, 2005 at 11:30 AM

Nice catch sedate. I was carelessly paying attention only to his question and the power numbers, not his actual subwoofer wiring options. Stick around this forum - we could use knowledgable & sharp folks that can point out mistakes like that. :-)

Sedate is 100% correct.

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New Project: 2003 Pathfinder

Posted By: Francious70
Date Posted: April 14, 2005 at 12:22 PM

Yep, wire each in series seperately, then parallel together for a 4 ohm load on the amp. The amp will put out the 800 that the subs will take.

Paul

Posted By: nismo350z
Date Posted: April 14, 2005 at 12:43 PM

alright i see what your saying, What i meant was should i run the subs @ 1 ohm, i was too hung up on speakers. Yea I'll probably run them at 4 thanks for the advice btw Perfect dvc10's posted_image

I love it right now with only 200 watts rms running through 1. Cant wait to hook up the other and with the mono block