wattage of amp @ 8 ohm impedance

[rf21 10+ year member]

need help here... i have a rockford amp that is rated 800a4... its gives you a power of 100x4 @ 4 ohms and 200x4 @ 2 ohms.... but im planning to use it for my type r subs (12"- 4 ohm + 4 ohm) that is why im gonna bridge it to 2 channel giving it a power of 400x2 @ 4ohm... how much power will my amp produce if i wire my subs to series... it will now have an 8 ohm impedance... will the power per channel also decrease to half since the impedance is twice.?//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

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[imral3 10+ year member]

dude... if your subs are SVC 4ohm then wire them in stereo to the amp bridging from 4 to 2 channels which would give you 400w RMS x 2. thats 400w RMS to each sub which should pound pretty **** hard.

 

[taylor 10+ year member]

8 ohm is roughly half of the power of 4 ohm.

 

[rf21 10+ year member]

no dude the thing is ive got dvc subs (4 ohm+4 ohm) ... so ill be having like 8 ohm per sub... will my 400x2 rms be giving half the power since the impedance is doubled?

 

[imral3 10+ year member]

yes... only half the rated power at 8ohm.

 

[RangerMan Premium Member]

Originally posted by rf21 no dude the thing is ive got dvc subs (4 ohm+4 ohm) ... so ill be having like 8 ohm per sub... will my 400x2 rms be giving half the power since the impedance is doubled?

If you have two dvc 4 ohm subs wired in parrallel, it would give you a 1 ohm load. Wired in series, a 4 ohm load. I don't know if I understand you completly, but I hope this helps.

 

[imral3 10+ year member]

Originally posted by RangerMan  

If you have two dvc 4 ohm subs wired in parrallel, it would give you a 1 ohm load. Wired in series, a 4 ohm load. I don't know if I understand you completly, but I hope this helps.

rangerman... he is wiring these subs to a 4 channel amp.

 

[RangerMan Premium Member]

Oh, ****...my fault. It would be best to get an amp for subs alone...

 

[rf21 10+ year member]

so guys what you are saying is that at an 8 ohm load my subs will just be getting 200watts each instead of 400x2?

i've got another option though..i've got one more amp, but its just rockford 500a2... what if i wire my subs to parallel ( that gives each sub a 2 ohm load each) and hook in the 500a2.. each channel will be giving like 250 x 2 rms @ 2 ohm each... do you think that will be ok instead of the 800a4 that is being bridged to 2 channel? will this give me enough bump though because the type r that i have is rated 300 rms each... need your help again...

 

[imral3 10+ year member]

wiring the DVC for each sub in parallel and wiring in stereo to the 500a2 sounds like a good plan to me. that should hit pretty good.