adding a second amp

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=9444
Printed Date: July 31, 2025 at 5:11 PM

Topic: adding a second amp

Posted By: djluscious
Subject: adding a second amp
Date Posted: February 12, 2003 at 5:27 PM

hi i have a jensen 300 watt amp and a rockford fosgate power150a amp, im currently runnig the jensen as it runs my 12" alpine way harder in bridged mode than the rockford does, i was wondering if anyone knows how to get more out of the rockford power 150a mono amp beause it must be better than the jensen?

also i would like to know if both amps have a pass thru can u just run the rca's from one amp to another, or do you have to run power and earth cables seperately for each amp, any help appreciated thanks

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LOWDOWN BASS FOR LOWDOWN CARS

Replies:

Posted By: lagatbezan
Date Posted: February 16, 2003 at 11:59 AM

to hook up the second amp, i would recomend getting a power distribution block to divide the power to both amps; ground each amp seporatly to the body of the car. pass thru is for sound only! ur amps still need power, ground and remote.

Posted By: thepencil
Date Posted: February 17, 2003 at 2:18 PM

djluscious,

If you are running your fosgate amp on the 12" sub at 4 ohm you are only getting 75 watt. However, if you have another 12" to add to your fostgate and bring it down to 2 ohm then you will get your full 150 watt. The other way of going about it is if your existing 12" sub is a dual voice coil then you could wire it up in parrallel to get it to 2 ohm, then you would get the 150 watt from you fosgate amp. Another thing that can help with your current sistuation is adding a capacitor.