mono vs Stereo for subs

I've got a question along the same lines...kind of. I've got the Audiobahn A2150HCT and it says its 1 ohm stable and can produce 1200 watts RMS. Then when you look in the manual, it only lists ratings for 1 ohm stereo, and only lists mono specs for down to 2 ohms. Can I not hook up my dual 2-ohm sub to this thing at 1 ohm mono and get 1200 watts RMS? What the fizzle!?

Racer, sound like you have a sub control problem.  This could be cause by many issues. 

The first way to check your system is to research all of your equipment.  Look for the specs for your subs.  Than measure the box to see if it is within spec.  A sub in a larger box than required can get sloppy due to a lose of control.  If you listen to music with rapid bass changes and don't mind losing your real low end you can opt. for a smaller box.   A smaller box will probably correct you bass kick problems but you will lose some low end.  

Ok, First off, The punch 120.2 is only stable at a 2 ohm load bridged and that is how it is wired. 2 4 ohm subs wired parrellel. I now know one of the problems, the subs are ineficient. The 1812 fosgates are rated at 90db. They are just cheap subs. So, that is the first upgrade.  MTX 7500's I think.

   Second, I beleive the amp is just under powered. 140 watts bridged into a 2ohm load is way under what I would normally run. So, Class D mono amp in the near future 500 watts RMS minimum should be enough.

 Ok, well another delema, just looked the amp up on fosgates site and the spec sheet says that a bridged load needs to be 4 ohm minimum. I have the subs wire for 2 ohm to the amp. This is a problem?

could Subs running in stereo cancell eachother out???

I always thought in mono they pound harder because both cones are in sync.

but in stereo both subs are on there own.. not 100% but slightly off sync.

subs in mono are in sync

subs in stereo arent as much causing slight cancelation

Yes, it is.  Two 4 ohm subs don't match up well with that amp for your purposes.

UPDATE: Today I disconected on of the subs and all is fine. Sounds just about as good as having both subs running.

     Another question without posting a new forum: I have all of the Sh*t in a 92 Chevy Lumina APV. With the cabin volume of a minivan will it take more power and subs to creat the same SPL as if the same setup were in Say a Camaro or another hatch back style car?