There are a few such threads already, but no users\/or owners thread that I am aware of, so I thought it may be better to have one for the users. This thread is for MultEQ users in general, so it is not limited to Denon and Marantz product owners in case users of other brands may be interested in it enough to consider switching in their next purchase. Emphasis is given on providing, sharing tips and even target curves. Actual FR graphs using REW\/Umik-1 mic and\/or Omni mic etc., are welcome, hope to see as many as possible.\n\nI've gathered some facts and tips from my search and found, and will post some of them later.\n\nBelow is just to start, the list will grow for sure, the information under the heading MultEQ filters are mainly from the AH interview with the founder.\n\nAudyssey MultEQ filters:\n\n- XT32 generates filters that have 32 times the resolution of XT for the satellites and 4 times for the subwoofer.\n- It uses Finite Impulse Response (FIR) filters. Note: PEQs are IIR type filters.\n- In AVR systems, the filters are set to +9 dB max boost and +20 dB max cut.\n- Audyssey MultEQ room correction algorithm relies on the analysis of measurements in the time domain and the effects of sound reflections from walls and other room surfaces. \n- MultEQ is capable of applying correction from 10 Hz to 24 kHz. However, during the measurement process it first determines the roll off points of each speaker and subwoofer, and limits the correction below that point.\n- According to Chris Kyriakakis, "We offer MultEQ at 96 kHz and even higher if needed so that the content can be processed without downsampling, even though the MultEQ filters above 24-30 kHz (adjustable) would be doing absolutely nothing. The issue is that doubling the sampling rate also doubles (roughly) the processing requirements needed. This is true for any kind of digital processing not just MultEQ. The AVR makers would have to add significant cost for more DSP processing and they have chosen not to do that. So they decided to use Audyssey at a max of 48 kHz. From an acoustic point of view this makes perfect sense for the reason I explained above. \n\nThe App:\n\n- The Editor App is compatible with D+M 2016 and newer models.\n- Main features are: can customize target curves, save them and share them with others, option to remove MRC (Mid range compensation), limit the range of frequencies that the EQ is applied to.\n- Customization only affects the Reference target curve, except the MRC removal will affect the Flat curve as well.\n- Before version updated 1.4.1, there was a 20 Hz subwoofer protection roll off.