A1 Evo Acoustix limitations with Denon MultEQ XT

[Blurmwood]

Hi, I was wondering if anyone could clarify a couple of limitations with A1 Evo Acoustix I ran into when calibrating my Denon X1800H (which has MultEQ XT).

1. I previously (with Audyssey) had the front left/right crossover set at 60 Hz. But I got this report from Acoustix:

05:02:23 PMYour receiver has MultEQ XT (not XT32) hence crossovers below 90Hz can not be used!
...
05:02:29 PM Optimum crossover found @ 48Hz. Refined Volume Adj: -4.394dB (Change: 0.021dB). RMS Error: 4.171 dB
05:02:29 PM Optimum crossover found @ 45Hz. Refined Volume Adj: -2.886dB (Change: 0.038dB). RMS Error: 4.594 dB
05:02:29 PM[Pair FL/FR] Individual optimal: L=48.0Hz, R=45.0Hz. Mathematical average (46.5Hz) snapped to nearest valid crossover: 80Hz
05:02:29 PM[Pair FL/FR] MultEQ XT requires min 90Hz crossover. Upshifting to: 90Hz.

Searching the web I found something saying that MultEQ XT can't EQ below 80 Hz (I think). Why would this be the case, when Audyssey allows lower crossovers?

2. I wanted to try the MIMO feature for integrating left and right with the sub. But the advanced config has MIMO disabled. Is it a limitation with MultEQ XT?

 

[Blurmwood]

@OCA sorry to bug you, but would you be able to comment?

 

[OCA]

@OCA sorry to bug you, but would you be able to comment?

I've a full comment on this within the last month or two here on ASR but I'm on mobile at the moment and can't locate it. You can find it if you search my posts.

 

[masterhw]

There were findings when testing the X1800H that it is unable to set (non-SW) filters below something like 93.75 Hz. Thus A1 Evo avoids allowing the speakers to play too far into what it can’t correct.

 

[Blurmwood]

I've a full comment on this within the last month or two here on ASR but I'm on mobile at the moment and can't locate it. You can find it if you search my posts.

By the way, thank you for your work! The express setup is sounding great.

 

[OCA]

By the way, thank you for your work! The express setup is sounding great.

Thank you.

 

[XDM]

There were findings when testing the X1800H that it is unable to set (non-SW) filters below something like 93.75 Hz. Thus A1 Evo avoids allowing the speakers to play too far into what it can’t correct.

You have good memory.

https://www.avsforum.com/posts/64042803/

XT cannot set [non SW] filters below 93.75Hz and MultEQ can't below 375Hz.

So not doing this cap on a non-XT MultEQ would result in mains that aren't equalized between 80-375 Hz. In that case you would still get an equalized subwoofer though, so I wonder if this tradeoff is ever worth it because this way the subwoofer will be highly localizable.

I guess you can manually set the crossover back to whatever crossover you desire and accept that your mains have (in your case 30Hz of) unequalized bass?

 

[masterhw]

I guess you can manually set the crossover back to whatever crossover you desire and accept that your mains have (in your case 30Hz of) unequalized bass?

Yes, and also worth remembering is that every speaker still plays below its crossover. So even set to 90 Hz, it’s not a neat 3.75 Hz of uncorrected - it slopes below the xo, but if you have wicked room modes at 80 Hz or something it could still be peaking badly.

I still use my X1800H and accept that this is the best a 15+ year old room midrange EQ suite can offer, and that I’d need to shell out for XT32 for a more ideal solution. It’s still plenty listenable as-is, and miles better than the stock Audyssey calibration, so I don’t have any immediate plans to upgrade.

 

[MarcoMP88]

Hi i use @OCA software Since A1 and i always loved the results i was able to get with it. This time somhow, something is going extremely bad with the sound. 9 Speakers, 11 Positions (99 Measurements) I did Measurements with UMIK-2 USB -12db (32Bit), ending up at around 75 SPL with Volume Level on my Denon x3700H set to 57,5 - Subwoofer is set to the same 75DB.

i did use the standard configuartion of the new Acustica X and it did found all of my speakers to crossover between 40-90Hz (which i consider to be very good because they are basically all capable of playing full range) - however. With the new calibration Dolby and Atmos sound fine ... but Stereo sounds absolutely broken. Wih no calibration my stereo image is pinpointed right at the center, with Calibration it goes all to the right, as if the left speaker isn't contributing at all. What do you think i can do to fix this?

04:48:11[SETUP] Target Curve AcoustiX_default.txt
04:48:11House curve (AcoustiX_default.txt) set in REW.
04:48:11[SETUP] Measurement File averagedRewMeasurements.ady
04:48:11[SETUP] Attempting to load configuration file: receiver_config.avr
04:48:11'receiver_config.avr' loaded and parsed successfully.
04:48:11[Receiver model specific] Name DENON AVC-X3700H
04:48:11[Receiver model specific] MultEQ Type XT32
04:48:11[Receiver model specific] Internal Speed of Sound 300 m/s
04:48:11[Receiver model specific] 180Hz Crossover Capable true
04:48:11[Receiver model specific] 70Hz Crossover Capable false
04:48:11[Receiver model specific] Cirrus Logic DSP false
04:48:11[Receiver model specific] Griffin Lite DSP false
04:48:11Application path for saving files fetched successfully.
04:48:11[SETUP] Attempting to load measurement file: averagedRewMeasurements.ady
04:48:11'averagedRewMeasurements.ady' loaded successfully.
04:48:11Optimization process starting...
04:48:11Found 28 measurements in REW. Deleting them before import...
04:48:14REW cleanup complete.
04:48:14Starting upload of 9 measurements to REW...
04:48:14131072 samples per measurement detected. Processing as 'manual REW measurement'...
04:48:14(1/9) Sent FL0 to REW.
04:48:14131072 samples per measurement detected. Processing as 'manual REW measurement'...
04:48:14(2/9) Sent FR0 to REW.
04:48:14131072 samples per measurement detected. Processing as 'manual REW measurement'...
04:48:14(3/9) Sent C0 to REW.
04:48:14131072 samples per measurement detected. Processing as 'manual REW measurement'...
04:48:14(4/9) Sent SLA0 to REW.
04:48:14131072 samples per measurement detected. Processing as 'manual REW measurement'...
04:48:14(5/9) Sent SRA0 to REW.
04:48:14131072 samples per measurement detected. Processing as 'manual REW measurement'...
04:48:14(6/9) Sent SBL0 to REW.
04:48:14131072 samples per measurement detected. Processing as 'manual REW measurement'...
04:48:14(7/9) Sent TFL0 to REW.
04:48:14131072 samples per measurement detected. Processing as 'manual REW measurement'...
04:48:14(8/9) Sent TFR0 to REW.
04:48:14131072 samples per measurement detected. Processing as 'manual REW measurement'...
04:48:14(9/9) Sent SW10 to REW.
04:48:149 measurements loaded into REW.
04:48:14Sorting measurements before processing...
04:48:15Successfully saved all 9 measurements to REW session: 'Measurements_2026-02-03_04-48-15.mdat'
04:48:15Resetting measurement windows and other settings... 100%
04:48:16REW settings reset successfully.
04:48:17Fetching all speaker impulse responses for alignment...
04:48:17All impulses fetched.
04:48:17Calculating all speaker delays relative to 'Front Left' speaker...
04:48:17 -> Reference speaker: FL - Delay: 0.000 ms, Impulse response correlation: 1.0
04:48:17 -> Delay for FR: 0.044 ms, Impulse response correlation: 0.5627
04:48:17 -> Delay for C: -0.539 ms, Impulse response correlation: 0.5645
04:48:17 -> Delay for SBL: -0.060 ms, Impulse response correlation: 0.6549
04:48:17 -> Delay for SLA: -2.711 ms, Impulse response correlation: 0.6903
04:48:18 -> Delay for SRA: -2.484 ms, Impulse response correlation: 0.6523
04:48:18 -> Delay for TFL: -1.273 ms, Impulse response correlation: 0.4738
04:48:18 -> Delay for TFR: -1.223 ms, Impulse response correlation: 0.5344
04:48:18Microphone position was 17.3mm left off center during measurements (FR was further away from the mic compared to FL).
04:48:18[Assuming ~52° stereo angle (26° half-angle from center)]
04:48:18Applying ISO-226 based equal loudness normalization to each speaker for perceptual volume level uniformity across channels...
04:48:18[CALIBRATION] System target level set to the level of 'Front Left' speaker (as calculated by REW): 74.70dB
04:48:18Starting analysis for 1 subwoofer(s)...
04:48:18Processing Subwoofer 1 of 1...
04:48:18[Subwoofer: 1] Calculating roll off parameters relative to the uploaded target curve...
04:48:18Subwoofer 1 Analysis Complete:
04:48:18[Sub 1 Applied HPF] 37.0 Hz (Slope: 18 dB/oct)
04:48:18[Sub 1 Applied LPF] 242.0 Hz (Slope: -24 dB/oct)
04:48:18[Sub 1 Volume Level] Required offset: -0.81 dB - based on the uploaded target curve
04:48:18[Sub 1 calculated spec rolloffs] HPF: 36.0 Hz / LPF: 227.0 Hz (for info only)
04:48:19Analyzing Pair: Speaker FL & Speaker FR
04:48:19 Optimum crossover found @ 48Hz. Refined Volume Adj: -1.600dB (Change: 0.021dB). RMS Error: 7.354 dB
04:48:19 Optimum crossover found @ 41Hz. Refined Volume Adj: 13.684dB (Change: -0.083dB). RMS Error: 7.496 dB
04:48:19[Pair FL/FR] Individual optimal: L=48.0Hz, R=41.0Hz. Mathematical average (44.5Hz) snapped to nearest valid crossover: 40Hz
04:48:19 Pair analysis complete.
04:48:19Analyzing Single: Speaker C
04:48:19 Optimum crossover found @ 46Hz. Refined Volume Adj: -0.748dB (Change: -0.170dB). RMS Error: 6.567 dB
04:48:19[Speaker C] Optimal crossover found at 46.0Hz, snapped to: 40Hz.
04:48:19 Analysis complete for speaker C.
04:48:19Analyzing Single: Speaker SBL
04:48:19 Optimum crossover found @ 66Hz. Refined Volume Adj: 18.755dB (Change: 0.003dB). RMS Error: 7.161 dB
04:48:19[Speaker SBL] Optimal crossover found at 66.0Hz, snapped to: 60Hz.
04:48:19 Analysis complete for speaker SBL.
04:48:19Analyzing Pair: Speaker SLA & Speaker SRA
04:48:19 Optimum crossover found @ 74Hz. Refined Volume Adj: 15.173dB (Change: -0.003dB). RMS Error: 5.242 dB
04:48:19 Optimum crossover found @ 96Hz. Refined Volume Adj: 8.489dB (Change: 0.030dB). RMS Error: 5.189 dB
04:48:19[Pair SLA/SRA] Individual optimal: L=74.0Hz, R=96.0Hz. Mathematical average (85.0Hz) snapped to nearest valid crossover: 90Hz
04:48:19 Pair analysis complete.
04:48:19Analyzing Pair: Speaker TFL & Speaker TFR
04:48:19 Optimum crossover found @ 56Hz. Refined Volume Adj: 0.331dB (Change: -0.013dB). RMS Error: 6.497 dB
04:48:19 Optimum crossover found @ 93Hz. Refined Volume Adj: 3.161dB (Change: 0.006dB). RMS Error: 4.460 dB
04:48:19[Pair TFL/TFR] Individual optimal: L=56.0Hz, R=93.0Hz. Mathematical average (74.5Hz) snapped to nearest valid crossover: 80Hz
04:48:19 Pair analysis complete.
04:48:19Calculated optimal subwoofer volume adjustment levels based on the target curve:
04:48:19[Subwoofer 1:] -0.8148dB
04:48:19Final volume and crossover settings:
04:48:19 Speaker FL: Crossover @ 40 Hz (BU 12dB/oct), Applied net volume adjustment: -1.5997 dB (via AVR volume setting: -1.5 dB, via DSP: -0.0997 dB)
04:48:19 Speaker FR: Crossover @ 40 Hz (BU 12dB/oct), Applied net volume adjustment: 13.6844 dB (via AVR volume setting: 12.0 dB, via DSP: 1.6844 dB)
04:48:19 Speaker C: Crossover @ 40 Hz (BU 12dB/oct), Applied net volume adjustment: -0.7477 dB (via AVR volume setting: -0.5 dB, via DSP: -0.2477 dB)
04:48:19 Speaker SBL: Crossover @ 60 Hz (BU 12dB/oct), Applied net volume adjustment: 18.7554 dB (via AVR volume setting: 12.0 dB, via DSP: 6.7554 dB)
04:48:19 Speaker SLA: Crossover @ 90 Hz (BU 12dB/oct), Applied net volume adjustment: 15.1727 dB (via AVR volume setting: 12.0 dB, via DSP: 3.1727 dB)
04:48:19 Speaker SRA: Crossover @ 90 Hz (BU 12dB/oct), Applied net volume adjustment: 8.4885 dB (via AVR volume setting: 8.5 dB, via DSP: -0.0115 dB)
04:48:19 Speaker TFL: Crossover @ 80 Hz (BU 12dB/oct), Applied net volume adjustment: 0.3308 dB (via AVR volume setting: 0.5 dB, via DSP: -0.1692 dB)
04:48:19 Speaker TFR: Crossover @ 80 Hz (BU 12dB/oct), Applied net volume adjustment: 3.1612 dB (via AVR volume setting: 3.0 dB, via DSP: 0.1612 dB)
04:48:19 Subwoofer 1: Applied net volume adjustment: -0.8148dB (via AVR volume setting: -1.0 dB, via DSP: 0.1852 dB)
04:48:19[FINAL] Target Level 74.7026dB
04:48:19Time aligning subwoofer simultaneously with speakers: FL, FR
04:48:19Searching optimal Speakers [FL, FR] + Sub configuration with per-speaker crossovers...
04:48:19Final configuration => Delay: 21.79ms | Inverted: No
04:48:19Final speaker, subwoofer and shaker distances:
04:48:19[FL] 2.75m (9.02ft)
04:48:19[FR] 2.76m (9.06ft)
04:48:19[C] 2.59m (8.50ft)
04:48:19[SBL] 2.73m (8.96ft)
04:48:19[SLA] 1.94m (6.36ft)
04:48:19[SRA] 2.00m (6.56ft)
04:48:19[TFL] 2.37m (7.78ft)
04:48:19[TFR] 2.38m (7.81ft)
04:48:19[SW1] 9.29m (30.48ft)
04:48:19A1 Evo made use of 'extended' speaker distances in your calibration (max 6m vs 7.35m Evo hacked!)
04:48:19DO NOT VIEW or edit distance settings in your receiver's setup menu (you can use the WEB UI) or AVR will silently reset them back to defaults, disrupting the calibration.
04:48:19If you accidentally do so, re-transfer the calibration file (.oca)
04:48:19Filtering final subwoofer on 241Hz, BU 18dB/oct lowpass roll off over target curve...
04:48:19LPF for the '.1' discrete LFE channel is set at 120Hz at default volume: 0dB (+10dB louder than all other channels).
04:48:19Note: LFE channel level can be adjusted to taste independently of the subwoofer volume in receiver menu under Audio > Surround Parameters > LFE volume.
04:48:22Bass system optimization completed! Starting filter generation process...
04:48:22Creating optimal filters for FL...
04:48:25Creating optimal filters for FR...
04:48:28Creating optimal filters for C...
04:48:32Creating optimal filters for SBL...
04:48:35Creating optimal filters for SLA...
04:48:38Creating optimal filters for SRA...
04:48:42Creating optimal filters for TFL...
04:48:45Creating optimal filters for TFR...
04:48:49Optimal filter generation for all channels completed.
04:48:49Full list of custom Settings used in this optimization:
targetCurve: AcoustiX_default.txt

 

[OCA]

Hi i use @OCA software Since A1 and i always loved the results i was able to get with it. This time somhow, something is going extremely bad with the sound. 9 Speakers, 11 Positions (99 Measurements) I did Measurements with UMIK-2 USB -12db (32Bit), ending up at around 75DB with Volume Level on my Denon x3700H set to 57,5 - Subwoofer is set to the same 75DB.

i did use the standard configuartion of the new Acustica X and it did found alls my speakers to crossover between 40-90Hz (which i consider to be very good because they are basically all capable of playing full range) - however. With tios calibration Dolby and Atmos sound fine ... but Stereo sounds absolutely broken. Wih no calibration my stereo image is pinponrted at the middle, with Calibration it goes all to the right, as if the left speaker isn't contributing at all. What do you think i can do to fix this?

View attachment 508861

AcoustiX was not really designed for manual REW measurements and the "rew_averager" tool you must have used is known to fail with certain measurements. If you can share your mdat file, I will have a look.

 

[MarcoMP88]

AcoustiX was not really designed for manual REW measurements and the "rew_averager" tool you must have used is known to fail with certain measurements. If you can share your mdat file, I will have a look.

Thank you 99 Measurements are very big - going to upload to Drive and send you the Link privately.