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Go Back   Blu-ray Forum > Audio > Subwoofers


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Old 04-03-2017, 03:42 AM   #1
brad1138 brad1138 is offline
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Jan 2008
Default Leveling my new(to me) SVS' Subs with manual PEQ

I downloaded a tone generator for my laptop, utilized my external DAC and UMC-200 Prepro analog inputs. Using my SPL meter, I plotted the response graph at sitting location, every 2 Hz from 20 to 100. Then learned how to use the UMC-200's PEQ. I learned to set "Q" values. I set the PEQ to +3 dB over about 1 octave at ~38 Hz and -6 over about 1/3 octave at ~ 50 Hz, and you can see the results in the graph below. Tamed it fairly well. I had no complaints before changing it, and haven't had time to listen, but flatter should be better. I decided not to worry about the below 30 Hz fall off. It isn't great to boost the really low frequencies (IMO) and it could be my SPL meter as much as an actual fall off, the SVS have GOBS of low bass.

Home Theater Sony VPL-HW45ES w/Elite Screens Tab Tensioned 125" screen. or Vizio 70"
PrePro Emotiva UMC-200 Amps 2xBryston 7B ST Monoblocks (mains), Harman Kardon signature 2.1 (surrounds & center), Samson S1000 (Subs) Speakers Mirage M-3si, Mirage M-Csi, BIC V-52 (x4) Subs 2 x SVS CS-Ultra Other PS3/PS4/XBox 2x Adcom ACE-515 Line Conditioner

2.0 System Schiit Modi Multibit DAC>Schiit Freya Tube preamp w/KEN-RAD VT-231 tubes>2xBryston 7B ST>Mirage M-3si.

Last edited by brad1138; 04-04-2017 at 08:25 PM.
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Old 04-04-2017, 04:12 PM   #2
brad1138 brad1138 is offline
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Default

After having some time to listen, it does sound better flat (no big surprise there). The overall volume level was lessened by about 3 or 4 dB after EQing, after adjusting for that, sounding even better.

Also, "C" weighted readings are down 6 dB at 20 Hz, 3 dB at 31.5 Hz and 2 dB at 40 Hz. If I correct for that, the response is pretty flat all the way to 20 Hz

Home Theater Sony VPL-HW45ES w/Elite Screens Tab Tensioned 125" screen. or Vizio 70"
PrePro Emotiva UMC-200 Amps 2xBryston 7B ST Monoblocks (mains), Harman Kardon signature 2.1 (surrounds & center), Samson S1000 (Subs) Speakers Mirage M-3si, Mirage M-Csi, BIC V-52 (x4) Subs 2 x SVS CS-Ultra Other PS3/PS4/XBox 2x Adcom ACE-515 Line Conditioner

2.0 System Schiit Modi Multibit DAC>Schiit Freya Tube preamp w/KEN-RAD VT-231 tubes>2xBryston 7B ST>Mirage M-3si.

Last edited by brad1138; 04-04-2017 at 04:42 PM.
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Dwayne (04-05-2017)
Old 04-04-2017, 04:42 PM   #3
brad1138 brad1138 is offline
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FWIW, (I know I am just having fun with Excel, and no one probably cares). But the green line is after compensating for "C weighting" offset. Pretty darn flat.

Home Theater Sony VPL-HW45ES w/Elite Screens Tab Tensioned 125" screen. or Vizio 70"
PrePro Emotiva UMC-200 Amps 2xBryston 7B ST Monoblocks (mains), Harman Kardon signature 2.1 (surrounds & center), Samson S1000 (Subs) Speakers Mirage M-3si, Mirage M-Csi, BIC V-52 (x4) Subs 2 x SVS CS-Ultra Other PS3/PS4/XBox 2x Adcom ACE-515 Line Conditioner

2.0 System Schiit Modi Multibit DAC>Schiit Freya Tube preamp w/KEN-RAD VT-231 tubes>2xBryston 7B ST>Mirage M-3si.
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Dwayne (04-05-2017), prerich (04-06-2017)
Old 04-05-2017, 07:08 PM   #4
Dwayne Dwayne is offline
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I'm glad you are enjoying the best Sub on the market, the SVS Sub . I care about the graphs you have shown, thanks . Enjoy!!!!
7.2 Denon 4520c.i. AVR, Sony 65" 4K HDR X900E, Monster HTS-1600, AMD Custom Built Computer/Media Player, Polk Audio RTi 12 Speaker's-Main's, Polk Audio CS-2 Center, JBL ES 80 Speaker's Surround, Polk Monitor 60 Surround Back, Acoustech 12" PL 200 Sub, Polk Audio 10" PSW 110 Sub, Sony BDP 570-SACD, Panasonic BDP 360 2.0 Onkyo 809 AVR, Polk Audio Monitor 70s, Audio Technica AT-LP-120
HOLD ON, FIGHT THE GOOD FIGHT, AND NEVER SURRENDER
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brad1138 (04-07-2017)
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