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Message Forums Car Stereo Message Forums > Subwoofers and Speakers > Old school Rockford Fosgate looking for some advice
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scrillacos
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 Old school Rockford Fosgate looking for some advice

Hello, new to the forums. I'm running some old school rockford fosgate subs/amps and am looking for some advice on potential changes.

Currently, my setup is like this:

2 RFD22215 (punch HX2s) in a dual chamber sealed box (about 2.5 ft per chamber) These are dual voice coil subs with 4 ohms on each coil. Each sub is paralell for 2 ohms. Each 2 ohm paralell sub is run to one of the 2 channels of the amp (power 800a2). Rockford says the amp is 2 ohm stable per channel in stereo.

Here is where things get interesting. I have 2nd power 800a2 and was considering running it as well to run those subs harder. However, the power 800a2 is only 4 ohm stable bridged mono. The only way I could see running the 2 15s with the 2 amps is to either:

Run each coil of one sub to one channel of each amp

or

Bridge the amps to one sub each at 2 ohms and risk roasting the amps.

The part im struggling with, is the stats in stereo @ 4 ohms per channel on the power 800a2 is 200wx2 rms. Its 400wx2 @ 2 ohms rms. Am i going to gain anything by running the 2 power 800s in stereo to each sub, 200wx2? Seems like it would be essentially the same thing that I can do with the one amp @ 400wx2 @ 2ohms per side. Just reaching out to see if it would make any sense to run that other 800a2, or would i just be wasting space?

Thanks for any help, oh, and below are links to the pdfs for the amps/subs.

http://www.rockfordfosgate.com/scrip...ted=1083775120

http://www.rockfordfosgate.com/scrip...ted=1050097912

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New Post 09-05-2011 12:06 PM
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sicaudio
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waste of space and even 1 of them amps imo is not enough power... you really need 6-800+ watts PER sub..

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New Post 09-05-2011 06:31 PM
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scrillacos
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Thanks. You think i would run the risk of smoking those amps if i parallel'd each of the hx2's coils to each amp bridged?

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New Post 09-05-2011 09:27 PM
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sicaudio
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more than likely yes...

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New Post 09-06-2011 09:33 AM
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