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View Full Version : Gotta quick sub to amp wiring question


Bumpin Expo
02-15-2004, 10:21 PM
Ok i gotta alpine amp thats

Alpine 3554 4ch amp. 50 watts x4 at 4 ohms

Now if i was to wire 1 10" to the amp that has a 4 ohm coil, how many watts would it see. Its going to b bridged, not wired to jus one strait channel

MDIFYTD
02-15-2004, 10:23 PM
should be ~200

TBSpyder
02-15-2004, 10:44 PM
Is it a dual or single voice coil?

Bumpin Expo
02-15-2004, 11:36 PM
Its a 10" bazooka with single voice coil. The single coil is 4 ohms. The amp does 50x4 in 4 ohms. Im going to wire the first 2 channels bridged like it says on the amp. How many watts would this b

MDIFYTD
02-16-2004, 04:07 AM
Originally posted by MDIFYTD
should be ~200

Bumpin Expo
02-16-2004, 09:22 AM
alrite thanks man!

stockls 15.4??what
02-16-2004, 06:34 PM
if ur using a 4 channel amp u will get 100 of the bridged channel

MDIFYTD
02-16-2004, 07:03 PM
how do you figure?

Solar Specialist
02-16-2004, 11:56 PM
Originally posted by stockls 15.4??what
if ur using a 4 channel amp u will get 100 of the bridged channel


I was going to say the same thing, but I don't know much. The way I see it the sub can only get power from 2 of the channels which is 100 watts.

MDIFYTD
02-17-2004, 01:10 AM
Ok so you have an amp that puts out 50w @4ohms.

Ohms law
P=V ²/R and V=IR

P=power, V=volts, R=resistance, I=current


We know that 50w=V²/4ohm or 200=V² or 14.1=V.

So now we know the Voltage we want to solve for the current across each channel. I=V/R or I=14.1/4 or I=3.53

So now that we know the current per channel we can plug it in to find out what the power output of combining two channels would be. P=I²R or P=7.06² * 4 or P=199.37 watts

Bumpin Expo
02-17-2004, 02:33 PM
Originally posted by MDIFYTD
Ok so you have an amp that puts out 50w @4ohms.

Ohms law
P=V ²/R and V=IR

P=power, V=volts, R=resistance, I=current


We know that 50w=V²/4ohm or 200=V² or 14.1=V.

So now we know the Voltage we want to solve for the current across each channel. I=V/R or I=14.1/4 or I=3.53

So now that we know the current per channel we can plug it in to find out what the power output of combining two channels would be. P=I²R or P=7.06² * 4 or P=199.37 watts

uhhh im not arguin wit him, sounds like he knows his shit:mullet:

aaron1017
02-18-2004, 01:33 AM
Owned by Ohm's Law!

I'll check the math tomrrow and double check.

joe2dmax
02-22-2004, 01:54 AM
hahahhahaa... thanks for the equation man. at least i learn something everyday. this should be stickied just for shits and giggles.


lol to aaron