House Curve question - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

Old 03-04-10, 12:51 PM
REW Author

John

Join Date: Apr 2006
Location: UK
Posts: 6,298
Re: House Curve question

Quote:
PoorSignal wrote: View Post
So the target curve is correct if I want 6db difference between 30 and 80hz,
even though the actual difference if I meet the target is more like 14db, according to the target graph.
It is not 6dB difference, it is 6dB more at 30Hz than it would be without the house curve (and 0dB more at 80Hz).
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Old 03-04-10, 01:01 PM Thread Starter
Senior Shackster
Jeremy

Join Date: Jul 2009
Location: CA
Posts: 193
Re: House Curve question

Quote:
JohnM wrote: View Post
It is not 6dB difference, it is 6dB more at 30Hz than it would be without the house curve (and 0dB more at 80Hz).
Arh!! It makes sense now.
The original curve that REW puts in there is just a standard 80hz crossover for the sub to fade out around 80hz right?
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Old 03-04-10, 01:03 PM
REW Author

John

Join Date: Apr 2006
Location: UK
Posts: 6,298
Re: House Curve question

Yep, you got it.
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Old 03-04-10, 01:09 PM Thread Starter
Senior Shackster
Jeremy

Join Date: Jul 2009
Location: CA
Posts: 193
Re: House Curve question

Quote:
Wayne A. Pflughaupt wrote: View Post

Not the filters so much. Often response is up and down because of what the room does to it. It’s virtually never perfectly flat. But basically, the house curve should track the Target. Here’s an example.

How can I get the straight line like yours? Do you have to put more linear samples in the house curve file?

Well, I found the one posted by Wayne, it looks like you have to fudge the values until it is straight, but I have a hard time converting that to 80hz cut off, or coming up with my own, it's too hard. Any tips?

Last edited by PoorSignal; 03-04-10 at 01:54 PM.
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Old 03-04-10, 02:16 PM
HTS Senior Moderator

Join Date: Apr 2006
Location: Katy, Texas
Posts: 8,809
Re: House Curve question

The Target Curve, with or without a house curve added, is mere a target line for the subwoofer qualization to generally track. After equalization, the sub level needs to be re-adjusted to blend properly with the mains. Once that happens, the "actual difference" will probably not be anything near 14 dB.

Regards
Wayne

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Old 03-04-10, 02:35 PM Thread Starter
Senior Shackster
Jeremy

Join Date: Jul 2009
Location: CA
Posts: 193
Re: House Curve question

This is the 80hz version I have came up with. Is it straight enough? I am overly obsessed with little numbers in real life! But I can see the little jags if I change the scale more, kept using a straight edge on the screen to check.

30 6.5
35 4.8
40 3.3
45 2.1
50 1.2
55 0.5
60 0.0
65 -0.25
72 -0.3
76 -0.2
80 0.0
Attached Thumbnails

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Old 03-04-10, 05:13 PM
HTS Senior Moderator

Join Date: Apr 2006
Location: Katy, Texas
Posts: 8,809
Re: House Curve question

Looks good.

Regards,
Wayne

Wayne A. Pflughaupt is offline
Old 03-05-10, 08:07 AM
REW Author

John

Join Date: Apr 2006
Location: UK
Posts: 6,298
Re: House Curve question

Quote:
PoorSignal wrote: View Post
How can I get the straight line like yours?
On the house curve settings page tick the "use logarithmic interpolation" box.
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