rockford fosgate 551x
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=91155
Printed Date: May 28, 2024 at 7:16 PM
Topic: rockford fosgate 551x
Posted By: Fosgate3
Subject: rockford fosgate 551x
Date Posted: March 01, 2007 at 3:26 PM
I was wondering if the power output of these amps tend to be underrated or not. I was thinking of bridging the 1 & 2 channels to a Boston Acoustics G5 dvc 10 wired at 2ohms and the 3 & 4 channels to another G5 10 at 2ohms. It's rated at 275w rms x 2 @ 4ohms. I've used some RF amps in the past that handled 2ohms really well without problem... I didnt know if this was one of them. These subs need around 400w to 500w rms. I'd like to find an 851x or 1051x but i cant seem to locate one. I think I can get my hands on the 551x though.
Replies:
Posted By: roo-dog
Date Posted: March 01, 2007 at 4:23 PM
i'm not familiar with that exact model, but most rockford amps are not stable into 2 ohms bridged (except mono blocks); they are only stable into two ohm stereo mode. the old school fosgates are way underrated. the newer ones may be also, but i wouldn't expect them to be by much, if any. from what you say, it looks like you will have to run both subs off of two channels of that amp (either 2-ohm stereo, or 4 ohm mono). you could also try running the subs at 8-ohms each, and bridge two channels up to each sub. you wouldn't be seeing the full potential of the amp, but the sq would probably be great. Those subs are def. underrated. i have put about 2000 watts to each one of the g-5 12's i have, and they love it. but they sound good even with the gains down, they don't seem too power hungry.
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(4)g5-1244, (4)gtr12, (2)ppipcx2400, (1)pcx4125, (1)pc4800.2, (3) pair mb quart 6.5"Q, (4)optimas, alumapro (1)5 and(1)15 farad cap, premier deh-p860mp, pioneer xm -dual H.O. alternators
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