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


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kaspbrochill 
Member - Posts: 2
Member spacespace
Joined: February 09, 2015
Location: Pennsylvania, United States
Posted: February 09, 2015 at 4:38 PM / IP Logged  
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!!
__________________
-96' Jeep ZJ:Project/DD
-04' CBR 600rr: DD
-01' BMW 328i: gone
-99' Jeep XJ: totaled
-99' Jeep xj
i am an idiot 
Platinum - Posts: 13,660
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: February 09, 2015 at 8:08 PM / IP Logged  
That amplifier is not 2 ohm mono stable. It is 2 ohm stereo stable, but not mono.
kaspbrochill 
Member - Posts: 2
Member spacespace
Joined: February 09, 2015
Location: Pennsylvania, United States
Posted: February 09, 2015 at 8:29 PM / IP Logged  
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
http://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
-96' Jeep ZJ:Project/DD
-04' CBR 600rr: DD
-01' BMW 328i: gone
-99' Jeep XJ: totaled
-99' Jeep xj
sirhutson 
Member - Posts: 30
Member spacespace
Joined: January 29, 2015
Location: Texas, United States
Posted: February 10, 2015 at 8:28 AM / IP Logged  
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.
Hutson-

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