When is room treatment needed - Page 4 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #31 of 189 Old 12-31-10, 12:44 PM Thread Starter
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Re: When is room treatment needed

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grn1969c10 wrote: View Post
Marty, I haven't used the newer version of REW yet, (Maybe this week...) but I believe you can view the waterfall graph for any measurements you have already taken and saved to disk. In the older version You could reopen them and select the waterfall tab to generate the graph. I thought I would mention that so you didn't think you had to set up all the gear and remeasure just to see the decay times for your current situation.

Matt
Thanks Matt but the thing that I need to look into is why my response with REW V5 seems quite a bit different from my older REW response, I am now concerned that my old results may not have been accurate so I feel like I need to get to grips with V5 and remeasure, then I can see if I can match the original results, then I can start learning how to use the waterfalls.

I shall have ago tomorrow

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post #32 of 189 Old 01-01-11, 03:22 AM Thread Starter
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Re: When is room treatment needed

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bpape wrote: View Post
Broadband bass absorption floor to ceiling in the 2 front corners. I'd also do some in the shorter left rear corner.

I would add at least 2-3 2" 2'x4' absorption panels on the left wall to bring better left to right symmetry by matching better with the curtains on the other side.

Ideally, the front wall would also be 100% dead to help with boundary interactions and to prevent reflections from the surround channels contaminating the front soundstage.

Bryan
Do I also need to put a panel on the bit of wall next to the front left speaker, at the same height or will the 2-3 panles along the wall at mid height be sufficient. Also once the front wall is absorbed can I push the speakers right into the corner or are they still better off staying about 2 feet away?

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post #33 of 189 Old 01-01-11, 10:16 AM
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Re: When is room treatment needed

Corner loading is almost never a good idea unless the speakers are specifically designed for it - which yours aren't. You would also like to try to make sure that the distance behind the speaker and the distance beside the speaker are not the same so the boundary interactions are different.

I'll have to go back and take a closer look on the short wall you're talking about.

Bryan

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post #34 of 189 Old 01-01-11, 11:34 AM Thread Starter
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Re: When is room treatment needed

Here are my measured results for sub+mains

When is room treatment needed-number1.jpg

When is room treatment needed-number1-waterfall.jpg

Not sure how best to show results in waterfall?

Would also like to know how good the sub response is, as it sounds great to me?

Last edited by marty1; 01-01-11 at 11:43 AM.
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post #35 of 189 Old 01-01-11, 11:56 AM
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Re: When is room treatment needed

The waterfall should be converted to logarithmic scale. That should make it display correctly.

Matt
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post #36 of 189 Old 01-01-11, 12:53 PM Thread Starter
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Re: When is room treatment needed

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grn1969c10 wrote: View Post
The waterfall should be converted to logarithmic scale. That should make it display correctly.

Matt
I have tried it on rewv5 does this look any better?

When is room treatment needed-rew5waterfall.jpg

If not how do I convert to logarithmic scale?

Thanks
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post #37 of 189 Old 01-01-11, 02:05 PM
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Re: When is room treatment needed

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marty1 wrote: View Post
If not how do I convert to logarithmic scale?
You can change the scale by clicking the "Freq-Axis" button in the top right corner above the graph.
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post #38 of 189 Old 01-01-11, 03:38 PM Thread Starter
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Re: When is room treatment needed

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You can change the scale by clicking the "Freq-Axis" button in the top right corner above the graph.
What do I change it to?
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post #39 of 189 Old 01-01-11, 08:00 PM
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Re: When is room treatment needed

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What do I change it to?
It will toggle it between a linear and a logarithmic scale.
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post #40 of 189 Old 01-02-11, 03:35 AM Thread Starter
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Re: When is room treatment needed

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It will toggle it between a linear and a logarithmic scale.
Which one is which? One goes down to 15hz the other only goes to 20hz?
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