I am still hoping that if repeated enough times, people will, hopefully more often than not, ask and/or respond to such questions after knowing the poster's actual power requirements.
For example, if one sits less than 10 ft from the speakers and never listen to spl more than 10 dB below reference level (frequently the case) then just about any mid range AVR can drive any 5.1/7.1 speakers including those Martin Logan's with XO set to 80 Hz. The Ohm thing may or may not matter at all.. Another example:
Person A using 8 Ohm speakers and brand/model XYZ
Person B using 4 Ohm speakers by paralleling two brand/model XYZ side by side
Person C using speakers with identical characteristics and brand/model XYZ except for argument the impedance is exactly half (4 ohms nominal) at every frequency.
If users A, B and C are all using the SR7015, listening to 75 dB from 10 ft, user A and B's SR7015 would be subjected to almost the same load current, all else (room, placement etc. etc..) being equal, at the same volume position. Person C's SR7015 would also be loaded exactly the same way, at volume position 3 dB below A and B's.
I am trying to make the point with some examples only because lately we seem to be getting questions about power/amplifier requirements and/or suitability every other day; and we keeping repeating responses such as, why do you think you need an amp anyway, just get 3 Outlaw monoblocks, may as well get a 7 channel Monolith etc etc... But what's the basis, what if the OP sits in a large room, from 4.5 to 5 meters and enjoy loud/music close to reference level at least occasionally? Sometimes we (me too) responded by linking an spl calculator, how many times we have done that on per week basis, I bet at least once, not counting mine.
Having said that, I can understand why a quick and somewhat safe generic response could be simply suggesting (without asking questions..) 200 W/300 W 8/4 Ohm rated amps, the likes of the Emo gen3, Monolith, Outlaw etc., listing the pros and cons of each based on what we know, and let the OP choose, obviously.
