No problem thumb5, I don't consider it hi-jacking! Colonel66 already explained the not correcting of nulls and I agree with him fully.
About the AM2.0 vs. 8033; I'm sorry but I can't fully remember the details and I only remember that the AM2.0 was the better (technical/electrical specs) and smarter/more advanced one of the two. I also considered the DEQX (too expensive) and MiniDSP products.
Before applying the AM2.0 I first measured the output of the subwoofer in various room locations using the free REW software. What I looked for in the measurement were the least number and least impacting nulls, knowing that the AM2.0 could take care of the peaks (which indeed it did ). It ended in an (for me) ideal location as the sub is now in the corner behind the left loudspeaker, just like you wrote DSpeaker mentioned in their manual. From my experience with Lyngdorf's Roomperfect I already knew that also they advise to place the sub near room boundaries, ideally a corner because of the same principles (it can also tune down peaks) and best bass impulse response. After offloading the bass of the main loudspeakers I could focus on the best placement of these for optimal soundstaging/imaging etc. Even though the Von Schweikerts are near full range this, to my opinion, is the better setup as normally with full range loudspeakers you'll always end up compromising either bass response or those sound reproduction attributes.
The Devialet applies a high pass filter (2nd order, 80Hz) to my loudspeakers so that it doesn't have to amplify the low frequencies (saving power) and my main loudspeakers don't have to play these frequencies as well. The sub out on the Devialet is configured to output a full range signal to the AM2.0. The AM2.0 then applies a fourth order low pass filter (also at 80Hz) and of course the room correction algorithm. I came to these values using REW measurements as well and of course my ears. All filtering on the sub itself is turned off.
I'm really disappointed that Devialet, for now, seems to have put the plans for room correction 'in the fridge' as one of the disadvantages of an external DSP is it's inherent delay due to processing the signal. I can't really hear it/or recognize the delay effect but if the Devialet would take care of the room correction all frequency's would arrive at the same time at the different drivers in the loudspeaker and sub making it technically better. Also I could then sell the AM2.0.
About the AM2.0 vs. 8033; I'm sorry but I can't fully remember the details and I only remember that the AM2.0 was the better (technical/electrical specs) and smarter/more advanced one of the two. I also considered the DEQX (too expensive) and MiniDSP products.
Before applying the AM2.0 I first measured the output of the subwoofer in various room locations using the free REW software. What I looked for in the measurement were the least number and least impacting nulls, knowing that the AM2.0 could take care of the peaks (which indeed it did ). It ended in an (for me) ideal location as the sub is now in the corner behind the left loudspeaker, just like you wrote DSpeaker mentioned in their manual. From my experience with Lyngdorf's Roomperfect I already knew that also they advise to place the sub near room boundaries, ideally a corner because of the same principles (it can also tune down peaks) and best bass impulse response. After offloading the bass of the main loudspeakers I could focus on the best placement of these for optimal soundstaging/imaging etc. Even though the Von Schweikerts are near full range this, to my opinion, is the better setup as normally with full range loudspeakers you'll always end up compromising either bass response or those sound reproduction attributes.
The Devialet applies a high pass filter (2nd order, 80Hz) to my loudspeakers so that it doesn't have to amplify the low frequencies (saving power) and my main loudspeakers don't have to play these frequencies as well. The sub out on the Devialet is configured to output a full range signal to the AM2.0. The AM2.0 then applies a fourth order low pass filter (also at 80Hz) and of course the room correction algorithm. I came to these values using REW measurements as well and of course my ears. All filtering on the sub itself is turned off.
I'm really disappointed that Devialet, for now, seems to have put the plans for room correction 'in the fridge' as one of the disadvantages of an external DSP is it's inherent delay due to processing the signal. I can't really hear it/or recognize the delay effect but if the Devialet would take care of the room correction all frequency's would arrive at the same time at the different drivers in the loudspeaker and sub making it technically better. Also I could then sell the AM2.0.
PS Audio P3, Shunyata ΞTRON Alpha Digital and HC/Furutech power cables, Paul Hynes SR7EHD-MR4, DIY Roon Server & Roon Endpoint running AudioLinux Headless, Phasure Lush^2 USB cable, Audioquest Diamond RJ/E ethernet, Uptone Audio etherREGEN, Mutec MC-3+ USB, Shunyata ΞTRON Anaconda Digital XLR AES/EBU, Devialet Expert 250 Pro CI, Nordost Tyr Reference LS cables, Von Schweikert VR-5 SE Anniversary Edition, Anti-Mode Dual Core 2.0, JL Audio Fathom F112. More detail here.
The Netherlands
The Netherlands