Audio Systems: 2 channel amp bridgeable, sony xplod amp, ohm subs

Question
I understand. The fact is that I didn't have an amp yet when I asked.  I had been looking for a cheap used amp on craigslist and could only find 2 and 4 channel bridgeable amps.  And since I dont' prefer to run my subs in stereo, I thought I would just bridge them together and then it would be mono.  However, today I just bought a California 600SX 2 Channel Amplifier(600W).  My speakers again are Phoenix Gold Xmax10 approx. 12 yrs old. (can't find model # anywhere on internet)and a 600 watt Pioneer 10 TS-W251R.  I'd like to run them both because then passengers on both sides of my car can feel the bass hit them in the back and because I'm a perfectionist that wants everything symetrical. Maybe I'm making too much out of it.  Maybe the bass signal isn't different for each sub when running in stereo.  I don't know. I'll just use two rca Y's and use this pattern [ stereo-< >--< amp ] to convert the signal to mono. Will that work? You answered my question though. thanks
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-----Question-----
Hi, this is a difficult question to word but most likely easily answered.  If I have a 2 channel amp bridgeable, can I connect 2 speakers bridged together to that single bridged channel?  I have two 10 inch subs.  One is rated at 3.36 ohms (pheonix gold xmax10) the other is rated at 4 ohms (pioneer 600w).  I have done it before many times with my kenwood amp(gone now), but recently had a fairly new sony xplod amp wired this way die on me for no apparent reason. thanks. I appreciate your feedback
-----Answer-----
you can put as many subs on a channel as you want as long as you don't go over the ohms that the amp is rated for.  2 4 ohm subs in parallel would make a 2 ohm load, most 2 channel amps aren't designed for that.  they're only made to run a 4 ohm mono load.  you could but 2 4ohm subs in series to make an 8 ohm load which would probably be better but if your subs arent a matching set this is HIGHLY discouraged!  in fact using 2 subs that don't match is always a recipe for disaster.  you'll probably get better sound just picking the best 1 of these 2 and powering it with this amp depending on the exact model of amp and sub we're talking about which you didn't provide me.
so to sum this up, yes you can put multiple subs on a mono channel, but you should NEVER mix and match subs and the fact that you didn't provide any model numbers of equipment keeps me from saying whether the amp you have would run just 1 of these subs better than it would run both of them.


Answer
dont use the RCAs like that, this will physically connect the right and left channels and yes will make a "mono like" channel but it will also cause the channels to drive eachother.  in other words the voltage from the left will flow to the right and the voltage from the right will flow to the left as well. that's not good at all.  when you bridge an amp you can go ahead and just feed it a stereo signal. in your case if you insist on runing both of these subs just hook them up in stereo.