Is a Rockford Fosgate P400-4 1 ohm stable?

[yungstarter 10+ year member]

Im just starting out my system front he ground up and am putting in 4 alpine 6-1/2 inch Type R coaxials(4 ohms each) in my 1994 honda civic ex.

Is the rockford p400-4 speaker amp gonna be 1 ohm stable and work with these speakers?

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[Grinder1989 5,000+ posts]

Check out Rockford's site. I'm sure there is a manual on there some where. To answer your question directly, I doubt it.

 

[Chrispy 10+ year member]

Pretty sure it's not 1-ohm stable.

If you're running just those 4 speakers off of it then you'll be fine.

 

[yungstarter 10+ year member]

yeah thats it im getting a seperate mono amp for my two 12 inch alpine R's

open to suggestions on an amp for to power the 2 subs btw

 

[kr15 5,000+ posts]

actually, Fosgate doesnt "advise" that any punch amps are one ohm stable..however, just today I witnessed a 400.4 run at 1ohm and not cut out. Advisable? No.

Possible? Absolutely

 

[amprepairman 10+ year member]

it'll do it till it blows up....

 

[kr15 5,000+ posts]

now, let me clarify..i may have seen a 400.4 do 1ohm stereo, not 1ohm mono. Is there a difference? Of the 4 channels, 2 of them were bridged to a dual 2ohm sub wired in paralell (one ohm). Being that only 2 of the 4 channels were used, would that create a 1ohm "stereo load"? or is it still mono because 2 of the channels were bridged? I think 1ohm stereo would be if only 1 of the 4 channels saw a 1ohm load?

And as to blowing up, My buddy drives around his daily driver like that, and it has never cut out. But maybe being that only one side of the amp is seeing 1ohm, is helping?

Like i said, Advisable? Not at all...Possible? Yes

 

[Master P 10+ year member]

It is not 1 ohm stable. It's a class a/b hybrid. The BD series are 1 ohm stable. And yes, bridging is mono. If you wired the dual 2 ohm coil in series it would be 4 ohm, then bridge the amp which brings it down to 2 ohm. Don't run the coils in parallel. Even then, four channel hybrids typically are not 2 ohm stable either. 2 ohms you could probably get away with though.

 

[kr15 5,000+ posts]

Im not sayin its advisable. I wouldnt do it. But it can be done. The BD series are the shit tho. Nice amps.

 

[kr15 5,000+ posts]

Im not sayin its advisable. I wouldnt do it. But it can be done. The BD series are the shit tho. Nice amps.