I'm in the process of moving from my Simaudio Moon Evolution i-7 integrated amplifier to a separate pre-amp/power amp set up. The initial plan (to save money) is to use my i-7 integrated amp as my pre-amp (since the pre-amp in the i-7 is basically the same as the Moon Evolution P-7 pre-amp) and buy a separate Simaudio power amp.
The most affordable amplification in the Simaudio line up are the 400 watts channel Moon M400 monoblocks at $6,500 for 2. The stand-alone version of the i-7 amplification section, a dual mono design with 150 watts per channel, is $9,000.
When I asked Simaudio about the difference between these two amps, they told me they are different amplification designs. The 400M monoblock is basically a stereo amplifier in bridged mode to get it up to 400 watts output at 8 ohms whereas the w-7 is a "dual mono balanced differential" design.
Can someone help me understand the difference (including pros and cons) of these two Simaudio amp designs?