Please help me interpret my FR graphs (Pics) - AVS Forum
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post #1 of 15 Old 11-26-2013, 06:38 PM - Thread Starter
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Hi everyone,

I just started using Fuzzmeasure to try to determine the best possible locations for my two subs.

I picked what looked like the best six locations/graphs and also included them a graph of all six overlaid.

What concerns me is how much the bass is elevated. Is this normal?

Every time I repositioned the subs, I ran Audyssey again and then ran Fuzzmeasure. The subs are identical and were always gain matched and set to 75db's.

It looks like the red graph/sub position is the best. Does this look good?

Thanks for the help.

Dan


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post #2 of 15 Old 11-26-2013, 06:44 PM
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Do you have DEQ enabled? That would explain the elevated bass.


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post #3 of 15 Old 11-26-2013, 07:02 PM
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Quote:
Originally Posted by dftkell View Post

What concerns me is how much the bass is elevated. Is this normal?
It just looks to me like the subs are set to a higher level than the mains.

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post #4 of 15 Old 11-26-2013, 07:24 PM - Thread Starter
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Originally Posted by Mrkazador View Post

Do you have DEQ enabled? That would explain the elevated bass.

I didn't look at the setting for DEQ after running Audyssey. If it defaults to "on" then yes, it was on.

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post #5 of 15 Old 11-26-2013, 07:32 PM - Thread Starter
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Quote:
Originally Posted by Bill Fitzmaurice View Post

It just looks to me like the subs are set to a higher level than the mains.

The first set of measurements were run without Audyssey. (Didn't post those pics.) I wasn't sure how to disable Audyssey from my previous use but I thought I did by enabling the equalizer in the Onkyo. I didn't adjust any levels on the EQ. I just wasn't sure how to turn off Audyssey otherwise. And believe me, I looked.

When I did it this way, I used an SPL meter to set the subs and the left speaker so that they were both at 75db's. Here is an FR graph it did in the beginning with Audyssey off (I think) and subs at 75db's and left speaker at 75db's.


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post #6 of 15 Old 11-26-2013, 07:36 PM - Thread Starter
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So it's not confusing…I ran a set of measurements without Audyssey first, calibrating the subs volume and the left speakers volume to 75db's with an SPL meter.

The graphs had the elevated bass.

So I ran another set of FR graphs with the subs in their various positions again but this time with Audyssey calibrations before each positioning. Before each Audyssey calibration, you are prompted to set the subs to 75db's, which I did.

The problem there could be that DEQ is the default and it was on. But I still had the bloated bass in the first set of non-Audyssey measurements.

This is frustrating.

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post #7 of 15 Old 11-26-2013, 07:41 PM
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Walk over to the subs, turn them down, measure again. See what happens.

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post #8 of 15 Old 11-26-2013, 07:42 PM - Thread Starter
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Quote:
Originally Posted by Bill Fitzmaurice View Post

It just looks to me like the subs are set to a higher level than the mains.

Wouldn't Audyssey have taken care of setting the sub levels correctly when I used it?

Thanks.

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post #9 of 15 Old 11-26-2013, 07:48 PM
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Quote:
Originally Posted by dftkell View Post

Wouldn't Audyssey have taken care of setting the sub levels correctly when I used it?

Thanks.

It should unless the sub trim is maxed out at -12db (-15 on some receivers I think).


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post #10 of 15 Old 11-26-2013, 08:11 PM - Thread Starter
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Thanks Bill and Mrkazador.

Tomorrow I'm traveling for Thanksgiving and won't be back and able to measure again till late next week. I'll look into whether or not DEQ is on and if so, turn it off. I'll double check levels of subs and speakers after Audyssey runs to make sure the subs aren't running hot for some reason. And if the graphs still come in with the elevated bass, I'll manually turn the subs down, remeasure and see what happens. I'll repost here with results.

I appreciate the help.

Dan

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post #11 of 15 Old 11-26-2013, 08:17 PM
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Quote:
Originally Posted by dftkell View Post

Wouldn't Audyssey have taken care of setting the sub levels correctly when I used it?

Thanks.
I don't know, I don't use it myself. I use a stand alone RTA/DSP.

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post #12 of 15 Old 11-26-2013, 09:22 PM
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orange looks to be the best placement, as for your eq/levels, that's another story wink.gif


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post #13 of 15 Old 11-27-2013, 04:45 AM - Thread Starter
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W
Quote:
Originally Posted by notnyt View Post

orange looks to be the best placement, as for your eq/levels, that's another story wink.gif[/quoteWhat's strange is that 3 of the six measurements are with only one sub placed and on. The other three are duals with volume knobs between 8 and 9 o'clock.. In both cases, Audyssey asks that the sub level be set to 75, which I confirm on the on screen meter and my Rat Shack meter. If I turn down the subs volume knob any more it will be almost at the minimum.

Perhaps the issue is indeed Audyssey's DEQ being on.

What is the right way to turn off Audyssey on the Onlyo. It's two years old, a 705 or 706 with Multi EQ. The manual doesn't say.

Thanks!
Dan

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post #14 of 15 Old 11-27-2013, 08:52 AM
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also use 1/6 smoothing for full range response

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post #15 of 15 Old 11-27-2013, 08:58 AM
 
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Tomorrow I'm traveling for Thanksgiving and won't be back and able to measure again till late next week.

Just saying. Word. Never post online you're traveling. Too many eyes looking for these types of comments.

Never post place of birth, mother's maiden names, birth date, name of employer (past or present), et cetera that can be used in identity theft, or used to research more information on an individual. Never let someone know it's safe to break into one's home because they'll know the individual is on the road.

In this day-n-age, it pays to be paranoid.

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