subs work untill I restart my car

[zamajoo]

I just recently installed 2 polk audio 12"(db1222) subs in my 4runner.

I am using a p8002 Rockford Fosgate amp to power them.

they work fine untill I turn off my car and restart it. then I have to unhook the speaker wire from the amp and hook it back up so it will work again. after I re-hook the speaker wire it works fine untill I turn the car off and back on. (yes the amp is bridged)

Before I got these subs I had 2 infinity 12 reference series hooked up to the p8002 amp. and eveything worked fine untill I blew one of them so I unbridged the speaker wire from the amp and was using one of the 12" and it worked fine.

any idea why it keeps doing this?

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[Phoenix Risen 10+ year member]

what size power and ground do you have and what VC config are the subs?

 

[daboyfrumdabx 10+ year member]

There's obviously multiple things that could be causing the issue. One to start off with is the fact that your sub/box combo is wired to 2 ohms final impedance. Your amp is only stable down to 4 ohms while bridged. In other words, that amp won't power those subs.

 

[daboyfrumdabx 10+ year member]

what size power and ground do you have and what VC config are the subs?

This is what he has:

db1222 Car Subwoofer from Polk Audio

 

[Phoenix Risen 10+ year member]

ok. yea your going to need a amp that puts out 6-750 watts at 2 ohms. possibly a MB quart DSC/onyx 1500. which would give you some room to upgrade later.

 

[zamajoo]

I bought the db1222 used, subs capacitor and amp. I just have not received the amp yet so I was hopping my Rockford Fosgate would be fine with them until I get the amp in a few days but I guess not. I am planing on buying a pair of Rockford Fosgate Punch P3 P3D212 to use with my Rockford fosgate amp(p8002). I just got a really good deal on db1222 and couldn't pass it up