I have illustrated my question in an attached jpeg...

but heres i go to try and explain it ...

I have 2 subs rigged up, and bridged together and i want to ad another of the exact same sub, do i just hook it into the other 2 i have connected already? or do i have to do something funky with the wiring?

please help, im new to this.

 

depends on what amp you have really.

you can do that, the second pic you drew, you will get 2.67 ohm load and if you amp is stable at that you should be ok.

 

yea it should be okay, the guy i bought them off had all three rigged up ... so i assume they were set up like that. i havnt been able to get ahold of him in a while to ask him.

 

well, it mostly depends on the amp, not the subs.

 

true ... i probably should hav mentioned that i bought the amp off him too ... basicly his whole system. Soooo everything should work fine i suppose ... just was curious about running it in the best way possible

 

Just because he had it wired like that doesn't necessarily mean it was done correctly.....if you can post the amp model we will be able to tell if the amp can work with that load....

HTH

 

its an alpine MRV-T757

 

The answer is NO!
The Alpine MRV-T757 is only 4 ohm stable bridged. It might work for now, but in the long haul that could very easily deteriorate the internals of amp if it doesn't go into protect mode.

Your options right now are go back to just 2 subs, or wire them for a 6 ohm load:
Each of the subs dual coils are wired parallell to get a 2 ohm load - then series the three 2 ohm loads to get 6 ohms . . . based on the amps specs, I would guess that a 6 ohm load would get about 225WRMS from the amp - so each of the three subs would get 75 WRMS. Or back to just two subs and you'll work with 300WRMS and each sub will get 150WRMS.

If you need any hands on help, I'm just 20 minutes south of you and I can lend a hand.

 

^^^ That was using the 12V specs.
With the 14.4V specs this is what it would look like:
3 subs @ 6 ohms - 300 WRMS - Each sub getting 100WRMS
2 Subs @ 4 ohms - 400 WRMS - Each sub getting 200WRMS.

 

thanks for the help man! so running 2 subs the way i have it will give me more bang for my buck haha.