Amplifiers for DIY subwoofers

I have 4 full marty subs using um18-22.they are 4ohm
recommended power is 1000W
I am trying to decide between UCD, ICE and pascal.
Can i bridge UCD modules to get more power? Thats my most cost effective option at the moment..
 
UcD2k is rated at 2000W @ 2Ω or 2500W @ 4Ω, so you would need 2 modules for your 4 subs and a power supply (SMPS3kA700). You can then decide how you want to wire your voice coils; if you want to wire parallel or in series to run the subs at 2Ω or 4Ω.

There is some discussion around these modules here: UCD2k @ 4.5kW ?