how do i know what power/ohm my amp is running at

[vdubpower 10+ year member]

hey, i had my system set up by professionals so im not sure how all the wirng etc makes an amp run at certain power.

heres my situation

i have a PPI powerclass 275 amp which i believe was bridged to mono to run my single 12w0-4ohm jl audio sub.

well the sub had wear and tear and i have now purchased a 12w3v3-4ohm at the advice of the jl tech people.

i was told that my amp probly is pushing 300wats and my previous sub max was 150, so the w3 is a beetter choice cuz it can run rms at 300w.

here is a pic of the settins of my amp,

is this correct set up to get 300w at 4 ohms

i reseached that this amp runs 2 by 75 wats at 4ohm

2 by 150 at 2ohm or 300 by 1 at 4ohm, but i dont know what wiring makes it do one verse othr

please advise

Click to read more...

 

[lostdaytomorrow 10+ year member]

We would need to know where the wires are going that are in the speaker inputs... The black and blue wires. You can check how the sub is wired using a DMM (Digital Multi-Meter) to check the resistance on the speaker terminals on the outside of the box.

 

[vdubpower 10+ year member]

lets see when i unplugged it, the black wires on the right side of the pic has a plus and minus , those were hooked up to the terminals of the box.

the purple on left goto the back of headunit as rcas , the blue wires, hmm im not sure, i guess they goto the powr supply ( battery? )

i dont have a ddm , is ther eany other way

thanks

 

[10W3dodge96 10+ year member]

i noticed that u have the bess on ur amp turned up, well turn ur bass down it blows the subs apart.

 

[vdubpower 10+ year member]

i guess that would explain why my 12w0 had tears in foam huh.

whats a good adjustment, ??

what is gain? how should it be set?

also, in regards to the blue wires, i noticed one goes into the other amp, a eclipse pa5422 50 by 4 amp used to run my speakers in the car

the other blue wire follows everything else i guess to the front of the car,

here is another pic

 

[vdubpower 10+ year member]

bump please

 

[vdubpower 10+ year member]

bump please, i need help

thanks

 

[vdubpower 10+ year member]

bump

 

[lostdaytomorrow 10+ year member]

http://www.caraudio.com/forum/showthread.php?t=63933