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Need subwoofer calculation help.

 

Silver Member
Username: Jemone

Stone Mountain, Georgia United States

Post Number: 212
Registered: Jan-06
I purchased a 3 ohm JL sub woofer on clearance. It holds 750 watts wrms at that ohm load. I need to know how to calculate the amount of watts a car amp puts out a 3 ohms, since car amps a usually rated at 4,2,and 1 ohm loads. I dont want to underpower the sub.
 

Bronze Member
Username: Fred_sanford

Huntsville, Alabama Usa

Post Number: 36
Registered: Nov-07
on a decent amp that is 2 ohm stable the power doubles going from 4 ohm to 2 ohm. just split the differance. if you have a amp that does 500 into 4 ohms and 1000 into 2 ohms it will do 750 into 3 ohms.
 

Silver Member
Username: Jemone

Stone Mountain, Georgia United States

Post Number: 213
Registered: Jan-06
Thanks a lot, I am mathematically stupid,and did not even think of that.
 

Silver Member
Username: Santa_fe

02 Hyundia Santa Fe, 120.3 db not...

Post Number: 395
Registered: Jul-07
hmm not always true....what kind of amp are you useing???? and its gunna be kinda tricky wiring that to 3 ohms.....what is the VC config on the sub?...ps u cant hurt a sub by underpowering it.....
 

Silver Member
Username: Jemone

Stone Mountain, Georgia United States

Post Number: 215
Registered: Jan-06
The sub is a single vc. I thinking about buying a cadence, or a Massive audio amp.
 

Silver Member
Username: Santa_fe

02 Hyundia Santa Fe, 120.3 db not...

Post Number: 396
Registered: Jul-07
well when you buy make sure its atleat 3 ohm stable okay....most will come 1 0hm tho....if ya get a mono...
 

Gold Member
Username: Johnfiac

A-ToWn, Bangn aint easy ....when u g...

Post Number: 3967
Registered: Mar-06
gel a regulated amp like a JL it runs 3om same power as 1.5ohm..
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