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Newbie - Hi and please help with REW measurements

HT_GUY999

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Joined
Aug 31, 2023
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Hi All

I am newbie on the forum, so firstly Hello to all.

I have the following setup in my Cinema/Stereo room (7.2.4 setup):

  • Marantz SR8015 AVR
  • Klipsch RP8000F MKII as L/R Channels
  • Klipsch RP404C as the Centre
  • 4 x Klipsch RP240D for Surrounds and Surround Back Speaker
  • 2 x Definitive D12 Subwoofers connected via SVS Soundpath due to cable lengths
  • 4 x Klipsch CDT 180 in ceiling speakers
  • Michi X5 which powers the Front Speakers L/R in HT Bypass mode. *Klipsch RP8000F MKII* when I do stereo listening I move them out and use KEF R3 Meta's. So essentially this is a dual purpose room. No REW measurements have been take for stereo listening with the KEF and Michi X5 yet
  • Room Size 4x5m
  • Wooden floor with a centred Carpet.
  • The walls have acoustic foam pads from Amazon.
I am using REW with a UMIK1, i have calibrated the SPL levels to 75/76db, measure the distance from the speaker with a laser measure and inputted those values into the Marantz.

I have taken measurements for the 7 channels thus far (not the subwoofers)

I need help analyzing the REW measurements I have taken thus far, and any recommendations criticism are welcome, end of the day I am trying to get the most out of the room. I am also considering putting a wall to wall carpet and removing the wooden floors and eventually maybe doing some acoustic panels and removing the foam pads from the walls

Here are measurements I have taken (screenshots)

Below are for Front Left and Right speakers 1/6 smoothing

Screenshot 2023-08-31 at 19.28.42.png


Waterfall for Front Left speaker
Screenshot 2023-08-31 at 19.29.59.png

Spectrogram for Front Left Speaker
Screenshot 2023-08-31 at 19.31.26.png

Waterfall for Front Right speaker

Screenshot 2023-08-31 at 19.32.52.png


Spectrogram for Front Right Speaker

Screenshot 2023-08-31 at 19.34.57.png


Centre Speaker SPL Reading 1/6 smoothing
Screenshot 2023-08-31 at 19.37.25.png


The Surround speaker and Rear Surround speakers 1/6 smoothing

Screenshot 2023-08-31 at 19.40.08.png


And just 1 x spectrogram for the Surround Right speaker (don't want to over complicate this post)


Screenshot 2023-08-31 at 19.41.51.png



Lastly some room pics to give you guys an idea of the what room actually looks like.

AIL4fc86f7g_kFqBhfze2Z5uimSPX_BOVdVScaLl7Ed0_LaAlAQfEUfTWZNnvuOcuyJaH2i1LWem7zUywFzydpU0_Pp4AWfiTLPAxc8cvqkkIU7Cd9yAuMmb6Cv_6urrgeMJScmpK__wnWmlXeVUH2lQ0zbCqircFGp6YZrLOSq24j6lV8oPCIvcwkEzUuqNExl0eNnawdbiKaWYWFFid4DTFYjXmpEfXOryI22co7eyLN5Nc8PZAdUc2jpYu0kVpewuZb4spAJ5BHzgbVul8LS5UVXhHE1kdMIXCgDRcHvwEH0MVSujw6ZWefnkamZj8-Abo-LgsNK22NF6RHgsPEiWnEgNe2UPxddf9xWsOyLqpeHbIsfoP4xdEEipkZljZfwnEkXq5Qoa56SJ3e37w4an3MPmoRgXejaRU7RKVon1UzkHE25wRHH1XoPJW4AhDlG3T21z4VPEOPM6FhjzAD9boJsTNzWKOaB_EyY3tjaRwfVKTjf_R_MNSXdIXvWjuZxGBZvtYRtwLfAlail4J6C0dsMNby9hNnGUc8VQECazhrWajN2IMJIIyd1p0adhk3Nc-41kDQ8wsPDDX0eO74IOIj4kwdf5BevfL6PmUcOFnTKEScsiddc3CixPnEpjwYWq9c-pNJN4WLIkqnRM-Ily5fmexFKLVNv7Hg6ha34Y3f7vmmLMFzS9WlTSdu8WDrIKSIJLMQhBCRSzz5XdkN-jr7stKooG8wlm10uJSJvq_sQZebTo3SsfnYtP8Q3ZZfp3JEkzZ1qKZ72rT67Hlo59Si408CZg_5_qPIivm372Ikt8XkV5W4hDQapqqwPcahTT0v3XGscb43aG3akfglDCHLEk28yZYaYpxe4xVpj0mE1LkHWtyXp5G-fB6y0NcXKKFstn23SxOuiljj8tX1fuDY_vY0s=w1284-h963-s-no


AIL4fc_G1OZZBDWZXCi9PPkcPa9LCVYeHgPR1kVz3jcmMffkRdjCeYLKosY3-vOw6XyBNHbchqTflh4oHpjzHdK7tBOqbt0n7dhhfLr1PmhzQPr6Nm-8KGCPD_ueZwRledfksquq1nsTGYRF-QpegzeWtiCloQoYybUQ287mdxWlLRuukW3526yA9nxo0wCLzPPDkP4bpDMMACNjemRqK6vHhOZyZHoTW2veStY4hyBK6JnSFIRwgC2LzXeTtuFmyTdvLvI5dL7W96hNyXztS3OC1dnzSO6uknJlP4DUHi3eUpr4i6Cezn3M0JBh_jDS953N7h5hnyLwIRXY7c4orRhjDHo9mac5ZN8Tqhb6yyNOHgP9sH8QdFFgUF3Ao-1d7UHTm1TyTsMYanyRLFuVqlYbgpQXz_wVUhCLA3u_WBNQn4lvHrWpRWjB89tXB-opPebIVp1Ln0vNIrJRZFoACeA2vT9BHNqk0Qas9U5Xt5Ymh8CeTD3Ww5nbKCbTLuycX7pl-PGwnrsSv4atZQ--OGHJ4fqC3IEnc6SdtW6k3qFnopyaZ60Ql2UFdCex7fogXO4YcLiJz286WWh0nK74bDmLXIk7RqZRoI9WwshD8eP0fFnX0tC8TO5pU3x2k5LHb3GpUOo30j_xWi3iTVGYQnutCGZzJjTUjImx330yYDaQEsymqzsVydCw0v3if-CUuisQXybVEO3xoq8Nd9s5L0yyRrSfDcJkxc4AoXwa6LssFfXWVSzBT9-UUCslKeaIQf8dxC94j0Z1t7jNfJ9pxU-tFxYhOIwTkPbUXz4n9UWE1GopaJwF4vvyIjuwO1eTjjf79yxzHwvLVezTKeRrAj5sCyUUhrYw3KTQDYehzlSdKUqompYyosQGdP3CpR2NxIA_nb7BXxAKPOKtCzs9eH6XLL-VLU0=w1284-h963-s-no


Thanks for reading and looking forward to replies, happy to share mdat files if needed.
 

AnalogSteph

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While I would take in-room measurements >500 Hz with a giant pinch of salt unless window size is reduced dramatically (try <1 ms for the higher ranges if need be and reduce measurement distance), it would appear your setup is a tad bright up top.

Also, your vertical axis range is huuuge. Try something a little more sensible like 50 dB. I wouldn't apply 1/6 oct smoothing right away either, but maybe 1/12 to 1/21 oct.

For the sub-500 Hz range, try the moving microphone method or at least average a few measurements. I'll generally be averaging 3-4 measurements or so per speaker in general.
 
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HT_GUY999

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Joined
Aug 31, 2023
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While I would take in-room measurements >500 Hz with a giant pinch of salt unless window size is reduced dramatically (try <1 ms for the higher ranges if need be and reduce measurement distance), it would appear your setup is a tad bright up top.

Also, your vertical axis range is huuuge. Try something a little more sensible like 50 dB. I wouldn't apply 1/6 oct smoothing right away either, but maybe 1/12 to 1/21 oct.

For the sub-500 Hz range, try the moving microphone method or at least average a few measurements. I'll generally be averaging 3-4 measurements or so per speaker in general.
Thanks you kindly for the above, I do see a dramatic improvement when the mic is move closer to the speakers about 1.5 metre away
 
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