View Full Version : question on ohms for subs


cDUBZon40s
01-18-2005, 12:21 PM
i have an alpine 1507 amp and want to get 2 jl audio 12w3's for my truck. they have dual 2, 4 and 6 ohm versions. would it be a good idea to get the 6 ohm ones since my amp has so much power so i dont blow them? thanks

idbl_Fanatic
01-18-2005, 12:29 PM
well if you go with the 6 ohm, then you have 1.5, 6 or 24 ohm finals load, that's your choices, I would go with the 4 Ohm, that way you can get 1, 4 or 8.

FSCparrothead
01-18-2005, 12:55 PM
well if you go with the 6 ohm, then you have 1.5, 6 or 24 ohm finals load, that's your choices, I would go with the 4 Ohm, that way you can get 1, 4 or 8.
:word:

x6369x
01-18-2005, 01:36 PM
well if you go with the 6 ohm, then you have 1.5, 6 or 24 ohm finals load, that's your choices, I would go with the 4 Ohm, that way you can get 1, 4 or 8.
:word:

Here's what I found:
http://www.carsound.com/reviews/amps/Alpine_MRV-1507.html
Output Power (resistive) minimum output 20 Hz to 20 kHz @ 1%THD+N (all channels driven into 2 ohms):
455 watts x 2 @ 14 volts
371 watts x 2 @ 12.8 volts
227 watts x 2 @ 10.5 volts

Output Power (4-ohm IHF Reactive Load @ 60 Hz to 1% THD+N): 995 watts

Best option is (2) 4 ohm DVC subs and keep the gains down:
http://www.rockfordfosgate.com/rftech/wiringwizard/2_4ohmDVC_4ohm.gif

cDUBZon40s
01-19-2005, 11:46 AM
ok i just wanted to make it so i had enough resistance so it would be hard for me to blow my subs with that big amp running them. thanks for the help guys