Full range measurements - Home Theater Forum and Systems - HomeTheaterShack.com

 
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post #1 of 8 Old 06-10-07, 07:19 PM Thread Starter
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Full range measurements

I have been making bass traps using OC-703. I ran some full range measurements to see what the differences are. The first graph is a before/after measurement. Certainly looks different. Will have to listen more to hear if it is better.

I definitely need to use the BFD to clean up the low end some.
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Full range measurements-11june2007.jpg  


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Downstairs: Oak Klipschorns, LaScala (center), Cornwall (sides), Bubinga Heresy I (rear), SVS PB12-Plus/2, Outlaw 990, McIntosh MA6100, (2) MC250, MC2100, Oppo BDP-95, Toshiba HD-A2, Belkin Pure AV PF60, Behringer DSP1124P

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post #2 of 8 Old 06-10-07, 07:23 PM Thread Starter
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Re: Full range measurements

Just for fun I placed all my bass traps around my left K-horn to make a pseudo anechoic chamber. Here are the results. I had the subwoofer turned off, however the speaker seems to go deeper than I would expect. I use the Behringer ECM-8000 mic.
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Full range measurements-k-horn-anechoic.jpg  


Dallas, Texas

Downstairs: Oak Klipschorns, LaScala (center), Cornwall (sides), Bubinga Heresy I (rear), SVS PB12-Plus/2, Outlaw 990, McIntosh MA6100, (2) MC250, MC2100, Oppo BDP-95, Toshiba HD-A2, Belkin Pure AV PF60, Behringer DSP1124P

Upstairs: McIntosh C2200, MC275 MKIV, Walnut Cornwall I, Oppo BDP-83, Technics SL-1200 M3D, Audio Technica AT150MLX, Richard Gray Power Company 400 Pro
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post #3 of 8 Old 06-10-07, 07:32 PM Thread Starter
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Re: Full range measurements

Here is what part of the room looks like.
A 2'X4'X4" OC-703
B 7"X4'X3.5" pseudo bass tubes. Wire fence, left over OC-703, 1/2" plywood frame.
C Mr. Waddles
D 2'X2'X2" OC-703

BTW the ceiling height where A is, is 19'!
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Full range measurements-dsc00777.jpg  


Dallas, Texas

Downstairs: Oak Klipschorns, LaScala (center), Cornwall (sides), Bubinga Heresy I (rear), SVS PB12-Plus/2, Outlaw 990, McIntosh MA6100, (2) MC250, MC2100, Oppo BDP-95, Toshiba HD-A2, Belkin Pure AV PF60, Behringer DSP1124P

Upstairs: McIntosh C2200, MC275 MKIV, Walnut Cornwall I, Oppo BDP-83, Technics SL-1200 M3D, Audio Technica AT150MLX, Richard Gray Power Company 400 Pro
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post #4 of 8 Old 06-10-07, 08:33 PM
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Re: Full range measurements

I think it's Mr Waddles that provided the extra 'woof' in your experiment!
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post #5 of 8 Old 06-18-07, 07:26 AM
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Re: Full range measurements

Do those pseudo bass tubes contribute anything? Did you do a sweep before and after adding those?
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post #6 of 8 Old 06-18-07, 08:25 AM
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Re: Full range measurements

Quote:
I use the Behringer ECM-8000 mic.
I note you aren't using the newer ECM8000 calibration file from sonnies professional calibration....

brucek
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post #7 of 8 Old 07-01-07, 02:28 PM Thread Starter
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Re: Full range measurements

Quote:
JimP wrote: View Post
Do those pseudo bass tubes contribute anything? Did you do a sweep before and after adding those?
Good question. Looks like they contribute very little. Dark blue curve is the one in which I removed the traps.
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Full range measurements-01july2007.jpg  


Dallas, Texas

Downstairs: Oak Klipschorns, LaScala (center), Cornwall (sides), Bubinga Heresy I (rear), SVS PB12-Plus/2, Outlaw 990, McIntosh MA6100, (2) MC250, MC2100, Oppo BDP-95, Toshiba HD-A2, Belkin Pure AV PF60, Behringer DSP1124P

Upstairs: McIntosh C2200, MC275 MKIV, Walnut Cornwall I, Oppo BDP-83, Technics SL-1200 M3D, Audio Technica AT150MLX, Richard Gray Power Company 400 Pro
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post #8 of 8 Old 07-05-07, 07:49 AM
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Re: Full range measurements

If you can cut the scale so you're only showing 10-300Hz, that'll let us see a lot more detail about what's really going on. Also, if you could post the waterfalls, that would help.

Bryan

I am serious... and don't call me Shirley.

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