Was about to ask u if u like the MRX but knowing that u hv certain standards for music am not surprised to hear that u are modding the MRX.
Its the same here. I am yet to find a multi channel AV amp that can come close to a proper pre/pro combination for music. Thats my opinion.
On the multiple approaches for room equalization that yamaha, pioneer, onkyo, denon, anthem all take....all the solutions try to address one thing, how to compensate for the typical person on the deficiencies of the room. Most 2 channel purist will not use them for serious listening and will rather try to fix it via room treatment of positionining whenever possible.
In my opinion, unless u hv a crap room, the area where the equalization can play a part is in the low end. A lot of detail is lost when the subwoofer or the low end is set up wrongly. Now, the setting of the phase knob in subwoofers is typically the same as the distance that most AVRs have. The distance setting is most important in multiple channel setup so its interesting how ARC does not set distance, so I will need to read up on that. Also in my opinion, trying to equalize above 2kHz is meaningless.
Each one of the equalization methods have their pros and cons, Audyssey seems to do a good job in the low end compared to the rest of them. MCACC has the ability to tailor a lot of stuff after the auto correction is done, YPAO I am not so sure as I hv not seen it used in a long time. ARC seems to also very good especially the one that comes with the D2V.
I never use the Onkyo (nor the Marantz/Denon for that matter) that I hv for serious 2 channel music. It just sounds so flat and digital (with or without equalization). For 2 channel music integration of the sub to my mains, I use the phase knob on my sub to ensure proper integration. It is good to understand the limitation of ur mains to get the sub integrated well. The F15 that I hv does it pretty well in my ears...
For movies, dual subs make it difficult not to use at least an EQ to at least ensure that they are both in phase (of course this can be done manually, but its a real pain trust me). Getting the phase of both subs playing together is crucial to ensure u are actually benefitting from dual subs compared to just having 1.
Auto EQ is also a marketing tool, some of the lower end ones don't do much its just another 3-4letter word that manufacturers stick on the amp to show that they have more features.
Audyssey has its drawbacks and is far from perfect. It has difficulties is finding the -3dB of the subwoofer and has been known to boost below the -3dB point in the subwoofer. Its implementations of the Dynamic Vol,EQ has been known to pass excessively high SPL signals to the subwoofer channel that causes pops, plus in my opinion it does not do a post equalization ping of the speakers to see if anything is out of the ordinary.
ARC - I'm not sure. I am tempted by the D2V to see if it is neutral for 2 channel listening compared to my pre-amp.
MCACC does not do too much equalization in the low end but is also known to boost low end to cause bottoming out of the subwoofer channel.
EDIT: I just read that u would need to set the speaker distances manually in the Anthem Amps...so that makes sense.
if u happen to be up north in alor setar again, do spare maybe 15 minutes to visit my place. have a listen to how the anthem handles music now.
and probably next month i'll be finishing up the move to an active system.
the upgrade to the anthem is a significant one. but not as significant as moving to an active system. that opened up a new world of possibility as tweaks could be done (electronically) to specific frequency range.
we hold frequent gathering to make sure i'm not the only one hearing improvement after each upgrade process. last gathering takes place last sunday.