Properly Wiring 4 Ohm Subs / 4ch Amp to 2 Ohms

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=138457
Printed Date: May 02, 2024 at 1:10 PM

Topic: Properly Wiring 4 Ohm Subs / 4ch Amp to 2 Ohms

Posted By: kaspbrochill
Subject: Properly Wiring 4 Ohm Subs / 4ch Amp to 2 Ohms
Date Posted: February 09, 2015 at 4:38 PM

Hey guys, I blew my old kenwood 800w kenwood amp that was "powering" my 2, 12" 800peak watts/400rms 4ohm subs in a ported Audiobahn enclosure in the truck on my 96' Jeep Grand Cherokee. Note: I bought the subs, box, and amp for $50 so it was definitely worth it for a cheap starter option.

I also have 4,6.5" 3-way performance series Kenwood speakers in all 4 doors powered by a Kenwood 4ch amp and I also rewired all my doors with 16g to handle the load.

Basically i'm looking the cheapest amp possible to properly power the subs, so that I can rightly sell everything as a package once I have my enclosure built and have the $ for the setup I want.

I'm pretty set on a Planet Audio 1600w 4ch full range A/B amp ($85 off amazon) and plan on bridging 2 channels, at 2 ohms to obtain 800rms x 2ch powering the subs 100% and being in the 75-150% range. Which wiring style would be best...series or parallel? Also, if anyone has any other decently priced amp's in mind, please lemme know.. Any and all help is appreciated!!
__________________

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-96' Jeep ZJ:Project/DD
-04' CBR 600rr: DD
-01' BMW 328i: gone
-99' Jeep XJ: totaled
-99' Jeep xj

Replies:

Posted By: i am an idiot
Date Posted: February 09, 2015 at 8:08 PM

That amplifier is not 2 ohm mono stable. It is 2 ohm stereo stable, but not mono.

Posted By: kaspbrochill
Date Posted: February 09, 2015 at 8:29 PM

i am an idiot wrote:

That amplifier is not 2 ohm mono stable. It is 2 ohm stereo stable, but not mono.

I'm partially confused as to what you mean? Their website says:
Total Power Output     1600 Watts
Peak Power @ 2 Ω     400 Watts x 4
Bridged Power @ 4 Ω     800 Watts x 2
RMS Power @ 4 Ω     200 Watts x 4
Channel Separation =     90 dB
S/N Ratio (A-Weighted)     86 dB
Frequency Response     20 Hz to 20 kHz ±1 dB
https://www.planetaudiousa.com/auto/car-audio-sound-system-auto-4-channel-amplifier-planet-audio-ac1600-4/

I figured peak power at 2ohms being 400w x 4...that if I bridged my 2, 4ohm subs that it would produce 800watts rms, powering each sub 100%?

What amp would you recommend that will create 400 rms x 2 or 800w rms on a mono? I've heard mixed reviews about using mono or multi channel with subs

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-96' Jeep ZJ:Project/DD
-04' CBR 600rr: DD
-01' BMW 328i: gone
-99' Jeep XJ: totaled
-99' Jeep xj

Posted By: sirhutson
Date Posted: February 10, 2015 at 8:28 AM

Just bridge channel 1 & 2 @ 4 ohms for sub 1, and bridge channel 3 & 4 @ 4 ohms to sub 2. BTW, this is a 400 watt amp, so bridging the channels will get you maybe 200 watts per sub. Not the amp i would suggest for your situation.

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Hutson-