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85 Htz killing me!!!!!!
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Old 2nd August 2008   #1
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85 Htz killing me!!!!!!

Hey my room has 6- 4'' of 703 panels and 4- 8'' of 703 panels. I recently received my JBL Lsr6328 with rmc and I started to go through the frequencies and well I realized that my bass traps were doing there job and I had no peaks but I have a huge dip about -7 dB at 85 Htz and I dont know why?? JBL says it's from early reflections but I don't know how they are there. I will post a layout of my studio later but please respond because I now know what has been causing all my problems.... What could be causing this??
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Old 2nd August 2008   #2
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Same here!!! I have the 6328's also, with alot of bass trapping. I don't have the RMC kit, but when I sweep a sine wave, it pretty much dissappears around 80hz...
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Old 3rd August 2008   #3
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Try to move the speakers and the listener position and check if your problem is solved or not
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Old 3rd August 2008   #4
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Quote:
Originally Posted by gearmaniac View Post
I have a huge dip about -7 dB at 85 Htz and I dont know why??
I'm not sure whether this will be good news or bad news, but a 7dB dip is *nothing*. I wouldn't even worry about it unless you really think it's causing problems.

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Old 3rd August 2008   #5
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I agree with Weasel, if you want you can try to slide back or forward but that dip really is not that bad.

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Old 3rd August 2008   #6
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It also depends on how sharp the dip is, if you put the mic about a foot from the speaker does it flatten out?
Don't expect to get a flat response in the low end range; +-6 to 8db is common.
The main thing is, if you can't correct it, is your aware of it...
Also try this, find the same frequency on a piano, or an open E on a guitar, and see if you can hear the dip...
Pure sine waves are the acid test, real music contains harmonics.
Not saying sines waves are worthless.
And yes speaker position is very important, your "room" is a big part of your monitoring..
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Old 3rd August 2008   #7
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Quote:
Originally Posted by Weasel9992 View Post
a 7dB dip is *nothing*. I wouldn't even worry about it unless you really think it's causing problems.

Frank
I'm in a similar situation and my question is .............
Would it be ok to place an eq in and fix the dip?
I've just ordered some bass traps and I have some other stuff and I don't know how to correct a bad frequency. Just realized my room needed treatment badly.
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Old 4th August 2008   #8
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I'm in a similar situation and my question is .............
Would it be ok to place an eq in and fix the dip?
I've just ordered some bass traps and I have some other stuff and I don't know how to correct a bad frequency. Just realized my room needed treatment badly.

I think the eq would just make it even worse?
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Old 4th August 2008   #9
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Quote:
Originally Posted by e-are View Post
I'm in a similar situation and my question is .............
Would it be ok to place an eq in and fix the dip?
I've just ordered some bass traps and I have some other stuff and I don't know how to correct a bad frequency. Just realized my room needed treatment badly.
Do not eq the room as you will just end up really messing it up. Sometimes if you have one last peak below 50hz you can us a eq to slid it down a bit but you NEVER increase to fix dip.
Get the bass traps installed and see how your mixes translate. If they do then leave it.

Glenn
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