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Room 40Hz Suck-Out Suggestions
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I have tried many speaker positions. They are 4' from the back and side walls - this is where I get decent imaging. Bass traps helped a bit (it was worse) but I am still searching for options (short of building a false wall to change room dimensions - thought I may do that in the end). The subwoofer (not shown, in back of room) fills in where the Triton 1s drop out at 40hz, but I would like for the 1s to run full range and not depend on the sub so much. ANY IDEAS WELCOME!
OBG
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halr.x10.mx/TritonReference.htm ; halr.x10.mx/other.html
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First of all, what a GREAT room! I could see spending hours in there with all those toys! You've got a lot of great gear and have done a great job setting it all up. It looks like an audiophile playground. Thanks for sharing your space with us.
Looking at your measurements, I'd say you have things in really great shape! Yes, there appears to be some issues at 49 Hz but the rest of the graph looks great. Count yourself lucky. What does the curve look like with all subs running?
My other question is regarding the bass traps. Those acoustic panels look a bit thin. Are you sure they are actual bass traps and manage bass down to 20 Hz? I have 4 bass traps from GIK and they look a lot thicker. GIKs thinner panels don't manage low frequencies well. I'd check the stats on those panels first and then play with placement. Based on your great frequency response now, you could create more issues than you solve. Just my .02.
Cheers,
T Cobe
Pre/Pro/AVR: Anthem AVM 60, Emotiva XSP-1
Amps: Emotiva XPA-5(2), Emotiva XPA-1L (2)
Sources: Oppo BDP-103D, Emotiva ERC-3, PS4, Pioneer PLX-1000 w/Ortofon 2M Bronze
Display: Epson 6030 UB, Elite Screens 110" Sable
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I see the similar suck-outs on Room Eq Wizard using a different UMIK-1 calibrated mic. although they are not as pronounced on the REW sweeps, so you may have a point there - thanks!
Will continue experimenting with the T1 bass control and see what that does - if I discover anything useful will post here.
OBG
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T Cobe wrote: Jose,
First of all, what a GREAT room! I could see spending hours in there with all those toys! You've got a lot of great gear and have done a great job setting it all up. It looks like an audiophile playground. Thanks for sharing your space with us.
Looking at your measurements, I'd say you have things in really great shape! Yes, there appears to be some issues at 49 Hz but the rest of the graph looks great. Count yourself lucky. What does the curve look like with all subs running?
My other question is regarding the bass traps. Those acoustic panels look a bit thin. Are you sure they are actual bass traps and manage bass down to 20 Hz? I have 4 bass traps from GIK and they look a lot thicker. GIKs thinner panels don't manage low frequencies well. I'd check the stats on those panels first and then play with placement. Based on your great frequency response now, you could create more issues than you solve. Just my .02.
Cheers,
T Cobe
Thank you T Cobe! I do enjoy my cave a lot, for music and video. The panel bass traps are of varying depth - some of the 24x48 panels are 6" thick, most are 4" and one is 2". There are also corner sofit traps 12x12x89". All made positive impact on the bass - the graph looked worse before. Will continue adjusting trap placement.
I may be giving too much attention to the 40hz suckout, but I thought I would ask here. The curve improves a lot after Dirac adjusts it. Another angle of the room showing the corner sofit traps:
And the equipment stack:
OBG
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I had similar looking response as yours. www.goldenear.com/forum/Show-Off-Your-Go...f-a-work-in-progress
Actually yours looks way better other than the null at 40. I have since moved the subs on mine and achieved a much flatter starting point prior to running room correction software. I posted new graphs showing how I basically removed my null at 48hz, but its not been approved yet so isn't showing up.
I'm hardly an expert as I've just been learning this as I go and experimenting. But this site helped find better placement for my subs. www.padrick.net/LiveSound/CancellationMode.htm
Which according to it if you're having a cancellation at 40hz means the boundary condition causing it is around 7' away from the speakers. Your ceiling would be my guess. I'd recommend placing two of the wall panels that you currently have on the front wall and try them on the ceiling at the reflection points between speakers and main listening position as an experiment and see if that reduces it.
I've not used Dirac but I have used REW. The chart shows just the left and rights without the sub,
From what I've read bass traps below 100hz are not great since they need to be like 6' thick at that frequency to do anything. At that point the recommendation is to add multiple subs to cancel the nulls and EQ's like MiniDSP or Dirac to lower the peaks. You can try adding an EQ boost at 40hz to see if its an eq correctable 'dip' vs a room mode 'null'.
Good Luck
Edit: just looked at the pic again, you dont have LFE going to them.
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