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  #51  
Old 06-11-2017, 10:11 AM
joey_v joey_v is offline
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Quote:
Originally Posted by Art Vandelay View Post
That's a lot of bass trap

I hope you don't end up sucking too much out of the mid and treble in the process though, which is always a different sort of trap, for the unwary.

Have you tried modelling the room response using REW or similar software? It could be that you have one or two room modes that are being more exposed now that you have speakers that extend deeper into the sub-bass region. If you're not familiar with REW I can model the response for you. All I need are the room dimensions, including ceiling height.
18x15x8.5
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  #52  
Old 06-11-2017, 09:01 PM
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Art Vandelay Art Vandelay is offline
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Originally Posted by joey_v View Post
18x15x8.5
The problematic modes will be at 31Hz (longitudinal) and 75Hz (latitudinal).

Best positioning for the speakers is about 4 ft out from the front wall and 2.5 ft from side walls, with both dimensions measured from the centre of the front baffle. Best place to sit is 2.5 ft from the real wall. Damping the 31Hz mode will be difficult because it's such a low frequency, but trap the corners with the biggest traps, and trapping the mid points of the side walls will help damp the 71Hz mode.

Last edited by Art Vandelay; 06-11-2017 at 09:05 PM.
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  #53  
Old 06-13-2017, 03:21 PM
joey_v joey_v is offline
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Gotcha. I got the biggest traps from GIK x4 and some monsters too. Should have sufficient trap of <50hz.

I will really run the system tomorrow night and see
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System 3: Rotel RC1570 Pre -> Rotel RB1582 Amp -> BW PM1 ->
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  #54  
Old 06-19-2017, 06:05 AM
4music 4music is online now
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Any news about the sound of the new 800D3? How does it progress?
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  #55  
Old 06-20-2017, 10:35 PM
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Art Vandelay Art Vandelay is offline
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My room is similar - 22 x 15 x 8.4, but because I listen on the short axis the primary bass mode is a little further up the spectrum. What does help is having a large sofa, but I also use some active eq to flatten the peak at 35-40Hz. In my case, a 2.5dB notch with Q=4 is optimum, and the response extends down to 20Hz before rolling off.

I think Joey's problem is the 31Hz mode, because the 800D3's are tuned lower and will have more energy below 40Hz than the 802D3's, and I don't think he had the same issue with his old 802D2's which have a higher Q tuning and more energy in the mid bass than his 800D3's.
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  #56  
Old 06-21-2017, 09:03 AM
joey_v joey_v is offline
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Working behind the scenes, will update once I have some news to report.
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