From what I know, according to feedback from McIntosh, their MX122 Video Board is based on the same Marantz (Denon) board design, similar to the Marantz 8802A Video Board.
What is different (and very important for my choice) is that ALL other components of MX122 are McIntosh own proprietory design with their own AUDIO technology such as the internal DAC, Audio board, Power Supply, etc.
Denon and Marantz companies merged together to become D+M Group in 2002 so both their HT AVR products share almost similar design with the same "Setup Menus". I think Marantz licensed the Video Board design and technology to McIntosh so that's why the "Setup Menus" looks the same.
However, the Video Board design is modified to make it compatible and work properly with McIntosh all other components, so this Video Board is manufactured in McIntosh factory with their own quality control.
Hehe... if its ALL the same as Marantz, I would NOT have bought the more expensive MX122 loh, and I would have save $$$ with the 8802A. After auditioning both McIntosh MX122 and Marantz 8802A, my own personal view and taste is that the MX122 AUDIO is much much better.
My MX122 supports Dolby Atmos, Auro-3D. Support for DTSX will come later when the MX122 new firmware upgrade is released.
Dolby Atmos, DTSX and Auro-3D are ALL AUDIO technologies built into the hardware codecs.
My MX122 also supports virtual audio emulation (not true audio channels) which changes the actual audio channels.
When I pressed my remote "Green" button, a menu pop out showing "Movie Sound" category. The different selections changes according to what audio is received.
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When playing video with 5.1 audio channels, the pop out menu shows "Dolby Digital" already selected which is the actual sound. I can change this to "Auro-2D Surround" so the original Dolby 5.1 will be changed to emulated (not true) Auro 5.1 channels.
When playing video with (stereo) 2 audio channels, the pop out menu shows "Stereo" already selected which is the actual sound. I can change this to "Auro-2D Surround" so the original 2 channels will be changed to emulated (not true) Auro 5.1 channels, so the centre, surround and sub will ALSO have sound.
If I played bluray with Dolby True-Hd, this will appear as the original selected one. I don't have any Auro-3D bluray to test so I can only assume that the pop out will change to Auro-3D, NOT Auro-2D.
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2L allows free sample downloads from their website (authorized for home use only) at...
http://www.2l.no/hires/index.html. Copyright belongs to 2L and the respective owners. 2L is music store for online audio albums/songs purchase.
not saying d Denon X7200WA is of equivalent sound quality...but the Mcintosh MX122 shares a few bases with Denon X7200 WA and Marantz 8802A....not just the video card
but all 3 sound different side by side...and of coz the MC well known for their power supply and other stuffs
D&M Holdings owned Mcintosh and shared a few technologies together which brought Mcintosh more into HT....