My understanding is that the "gain" has to be identical or you may hear some differences. My suggestion would be to buy a 7 channel amp or two identical 4 channel amps like HK which you can get on UBID usually or I assume even cheaper somewhere else. ;)
I have had one for almost a year. Excellent build quality and sound. 112 pounds. Doesn't get very hot. Sold two Citation 7.1s to purchase it. Ironically, I purchased it because I was buying the matching processor RAC-7 but due to the inflexible bass management I ended up with an MC-1. Now that...
I have an Angstrom 100 processor, designed by Mike Moffet. It has no video inputs or DTS. Sounds pretty good to me and built like a tank. I also have 2 Citation 7.1 amps, two 7.4 subwoofers, Sony SS-9 speakers, (great sound and bass,) Aerial CC-5 center channel and Citation 7.3 surround...
First, this is a great forum. Just found it.
I just sent back a ADA Rhapsody today to UBID. Basically it is a professional unit formerly sold by custom installers that is not being supported by ADA. There is a 60+ page manual that shows all of the great features but a two page preprinted sheet...