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Harbeth Speakers World's best loved loudspeakers |
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#1
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Harbeth 30.2 in-room measurements with REW 5.20
Got my new Dayton NIST-traceable calibration USB mic today from MiniDSP today. Only $89. Measurements are now easier as I don’t need to use the M-Audio mic preamp anymore, just plug in to a USB port and go.
With that, I decided to do some in-room measurements of my Harbeth 30.2 40th Anniv speakers using REW 5.20. The responses were based on where I had previously set the controls my REL R-305 to integrate with my larger Dynaudio Contour S3.4s back in the day, so the sub has not been "optimized" for the 'Beth. I just plugged in the mic, attached the output cables and measured both the L and R channels from one of my reference listening positions (the quasi-nearfield equilateral triangle listening position). The mic was set at 90° (vertical) and the height was at my ear level. All measurements of positions of the speakers to the front wall, toe-in, and mic positions were measured using a laser tape measure. The 90° mic calibration file was used as the reference mic file. Target SPL was 74 dB, which is about as loud as I ever listen. Shown here are the individual left and right Harbeth 30.2 frequency response plots in REW, using 1/3 octave smoothing. Red is the right channel, Green is the Left channel. This plot depicts the L and R channels "averaged" in REW. Still using 1/3 octave smoothing. Overall, not bad. I'll likely go back and tweak the settings on the sub a bit, but pretty pleased with how close this is out of the box, so to speak. Overall, the 'Beths are pretty smooth across the board.
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components. |
#2
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Where are you crossing the sub and mains?
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Main Equipment: Kharma Elegance dB11-S, JL Audio F113v2 X 2, Block Audio Line & Mono SE Amplification, Bricasti M21 DAC, Antipodes Kala K-50 Server, Clearaudio Performance SE. Satisfy tonearm & Maestro Wood MM cartridge. Power: Shunyata Everest 8000, Sigma XC v2, Sigma NR v2, Block Audio PCs, Defender, ADDPowr Wizard Grounding: Shunyata Altaira CGS - 4 X Alpha CGS cables, Network : Supra Cat 8+, Twin (Nenon) Modified Buffalo GS2016 Switches, Keces P3 LPSU, Cables: Wireworld Platinum 8 USB, Wireworld Platinum 8 Speaker cables, 6M & 1M Tubulus Concentus ICs, Other:Two PSI Audio AVAA C20, Multiple GIK products, Stillpoint Apertures, Stillpoint Minis and Ultra SS, Three 20 Amp lines, Furutech GTX - Gold outlets, Adona Rack |
#3
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BTW, vertical axis scale (SPL) is not good. On your graphs, measurements appear to be more flat than they really are. To be consistent, REW best practices suggests the vertical axis scale should be 60 dB starting at 45 dB and ending at 105 dB SPL. Smoothing should be 1/6 octave. Also, it's not bad to provide two sets of graphs/measurements with different horizontal axis - in order to provide more details of bass FR: 1. 15-200 Hz 2. 15-25000 Hz Last edited by Delija; 05-13-2021 at 06:08 PM. |
#4
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I used 1/3 octave smoothing because that is what Danny Richie uses with his CLIO system. If I have time today, perhaps I'll go back and replot the data. This isn't a PhD thesis; I just wanted to tweak the REL's setting to better match the Harbeths as it was originally set for my big Dyns.
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components. Last edited by Puma Cat; 05-14-2021 at 12:53 PM. |
#5
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Interesting Stephen. I’m familiar with log sine sweep measurement of electro-acoustic systems but not familiar with REW.
Does REW allow you to access the calculated impulse response of the system? It would be great if you could post it. Does it allow you to window the loudspeaker time response when making the final FFT? Just curious. Tom
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Main System: Amati Futura Mains Amati Homage VOX Center, Proac Response 1sc Rears, Three MC2301's for L,C,R MC 602 for the rears C 1100, MX 151, MCD 1100, MR 80 Nottingham Dais with Wave Mechanic Sumiko Palo Santos Presentation SurfacePro 3, RPi 4, ROON, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material. Lake House: Ohm F, MC 275V, C2300, MR 77, Rega P3 OnDeck: McIntosh MAC 4300v |
#6
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Yes, I believe so. I just used it at its default settings. When I get a chance, I'll go back and post the default settings and the impulse plot. I can post the spectral decay, too. BTW, REW is free and available here: https://www.roomeqwizard.com The landing page will provide a lot more information for you than I could here. There's a lot to dig into, and it's free. It seems to be a good option without having to buy a CLIO System.
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components. |
#7
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Thanks, I’ll dig into it. I know a lot of folks use it.
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Main System: Amati Futura Mains Amati Homage VOX Center, Proac Response 1sc Rears, Three MC2301's for L,C,R MC 602 for the rears C 1100, MX 151, MCD 1100, MR 80 Nottingham Dais with Wave Mechanic Sumiko Palo Santos Presentation SurfacePro 3, RPi 4, ROON, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material. Lake House: Ohm F, MC 275V, C2300, MR 77, Rega P3 OnDeck: McIntosh MAC 4300v |
#8
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Cheers, mate.
I'll go back and post answers to your questions when I get a chance later today.
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components. |
#9
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Stephen, thanks for sharing your findings, very interesting!
Please check my exchanges with Danny in the comments section under his latest video. https://www.youtube.com/watch?v=irdIUAcA7MU&t=31s It's all arranged... he's waiting for your speakers
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Sonus Faber Elipsa SE | REL S/812 | Goldmund Telos 280 | EAR Yoshino 912 | Merason DAC1 | Innuos ZENith Mk3 | Clearaudio Innovation Basic + TT5 + Lyra Delos | Studer A810+A807 | Nakamichi Dragon | RDacoustic Hybrid Acoustic Diffuser |
#10
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I might actually do that now that my GR-Research X-LS Encores are fully run-in. They've opened up and fleshed out nicely!
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Lumin P1 streamer/DAC/preamp, Constellation Inspiration integrated TT: Michell Gyro SE MkII, SME V, Koetsu Urushi Vermilion, EAR324. Harbeth 30.2s, REL R-305, Shunyata Alpha V2 ICs, Alpha V2 SPs, Sigma XC, Sigma NRv2, Omega QR-s & Alpha NRv2 PCs, segmented Altaira SG stack w/ Alpha & Omega CGCs, Everest 8000 PD. Remote Server Room: Uptone EtherREGEN, AfterDark Master Clock & LPS, Alita, Battle Angel, (Akasa NUC Roon Core), iFi DC Purifiers (for SMPS used for Alita & router), Shunyata Gemini combo power distributor & Altaira-type CG GP-NR hub, Venom & Alpha CGCs, Shunyata NRv14 power cords for digital components. |
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