92fireaudio

I purchased a rockford fosgate 800a2, I want my subs to sound good and hit well also, but I don't want to damage them.. Right now I have 2 infinity perfects, each wired to a channel (200x2@4ohms).. From what i've been told, if I bridge the amp and run both off the bridged channel, i'd be getting closer to 400 watts RMS.. The subs are rated at 350Rms but I've heard they can handle between 500-700 safely.. What would you suggest under this situation? Should I keep it at 1 per channel, or should I try to run it bridged, 2 ohm..

Thanks

daniel dekay

as u can tell, i am not jim85, but i have had some experience with rockford fosgate equipment. heres what i have found;

its ok to run those subs as they see a bridged load from the amp. as far as bridging the amp to 2 ohms, i would highly NOT recommend for a couple reasons. first, there are very few amps on the market that can handle a 2ohm bridged load successfully without going into "safe mode" and totaly shutting off. Rockford made a few (model 50m and 50.2 only) and i know soundstream made a few(the model #'s escape me right now). a 2 ohm bridged means that your amp is steady down the 1 ohm, which the RF800.2 is not.

as far as running either 2 or 1 channel, are those subs rated at 4 ohms or 2, are they dual voice coil(DVC) or single? because if they are 4 ohm speakers, you will not be able to run 2 ohms cuz only one channel from the amp will be used(and that would be pointless). which only leaves bridging the amp. if they are DVC, then you can configure the level of impedence to anywhere from 1 to 16 ohms. which means u can run 2 ohms out of each channel.

this is all speculation of course until you can let me know what specs are on those subs. if any of this seems confusing, my apologizes to you. let me know if you want me to explain this kinda stuff to you.

hope this helps,

daniel

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92fireaudio

The subs are 4 ohm, SVC... I don't understand why the 800a2 wouldn't run a 2 ohm bridged load? The 360a2 that I returned ran in a 2 ohm bridged load when I had it...

Thanks

Jim85IROC

iTrader: (2)

The 800 will be fine running a 2 ohm bridged load, just make sure that you have adequate ventilation because it's going to get real hot. The 800 will be a good amp for those subs. Subs can absorb a LOT of power if it's clean, undistorted power. My Zr 600 benched at 800 watts RMS into 4 ohms bridged, and I'm running a pair of Oz subs bridged into a 2 ohm load. The Oz subs are only rated at about 250 watts but are doing just fine.

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92fireaudio

thanks jim.

daniel dekay

jim, i think u are wrong on this one. if you look into a manual of one of those punch amps, you will see that it is not ADVISED that you run it at 2 ohms bridged, that is like letting the amp see 1 ohm, which these new punch amps are not capable of seeing. your kicker is different from the punch series, im only saying that Rockford corp doesnt advise running those amps at 2 ohm bridged or 1 ohm stereo. only the rf 50.1 and 50,2 "competition" amps should be run at that impedence, i have the manual to prove it.

daniel

92fireaudio

It hasn't caused any problems yet.. I've had the subs on and pounding for a few hours in a row today and the amp hasn't missed a beat..

Justins86bird

I've generally found that quality amps can easily go at least the next step lower then what is printed in the manual. As long as you have proper ventallation, there shouldn't be a problem. I've run several Alpine V-12 amps bridged at 1.5 ohms without a hitch, even though the manual doesnt say it can.

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Jim85IROC

iTrader: (2)

I have a whole store full of manuals. You are right, the manual says that they are only stable into 4 ohms bridged. That's because they run pretty hot, and they don't want to deal with warranty issues from idiots that run the amp into 2 ohms bridged and stuff it under a seat where it gets no air. The 500 and 800 will take 2 ohms bridged all day long as long as they have adequate cooling. Throwing a fan over the heat sinks certainly wouldn't hurt. The 360s and down don't seem to deal so well with the low impedances and shouldn't be used as such.



------------------
The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah