bridged 2 channel vs. mono block sub amp

Is there an advantage with getting a mono block sub amp or bridging a 2 channel amp to push subs? I have a 2 ch. phosgate 550s bridged, with two parrelled 12'' kicker comps @ 4ohms they also share the air space in the enclosure.

The advantage is with a mono amp, you can be certain there is no possiblity of cross-channel imbalances that might cause losses, circulating currents and noise, and also most mono amps can handle lower impedence loads than most stereo amps. Support the12volt.com

most on the market are stable between 1-4 ohms correct? if i go with a lower impedence load I'd have to get two new 4 ohm subs, the ones I have now are 8 ohm svc.

RF stereo amps are stable at 4-ohms or greater when bridged.  If you have 8-ohm SVC subs, parallel them to the amp and your net load will be 4-ohms.Support the12volt.com

That is the way they are wired now, into a 4ohm load, if I upgrade to a mono amp, say a RF1501bd, to get the max out of it in a 2 ohm load I would have to change to two 4ohm subs wired in parallel. being that they share air space would it be better to run a mono block with my current subs @ 4 ohms or new subs @ 2ohms 

Why do you want to run at 2-ohms?  Just to get louder?  I guess if all you want is loud, then yes, you'll have to change subs to get a 2-ohm load.  But there is no problem with using them as they are now and those subs will sound better and will allow your amp to last longer and run cooler at 4-ohms.Support the12volt.com

I totally agree with Dyohn on this, the only reason to change your subs is if you want more output. You have a good match of subs and amp right now, what is it that you are unhappy with about the match?Top Secret, I can tell you but then my wife will kill me.

  I'm not unhappy with it. I was just concerned that with the shared air space and a bridged 2 ch that there might be varriences or cross channel imbalances, that could damage the subs or the amp. the gains are set to about 3/4's or as close to 3/4's by eye . I just started to think that a mono amp would be a better choise with only having to deal with one gain setting. I've read the thread about setting the gains with a volt meter and it seems pretty easy. plus all the advise you both (rob and dyohn) have given me, I'll give it a try. I guess it was that little voice in the back of my head that made me question my setup, I'll just turn his volume down a little.