Um....What? I Need HELP

[ousooner2]

Gene's in-room measurement:





What my measurement would look like in my room (applied to gene's curve; -25dB from 5k to 6.3k and another -9dB from that to 8k)

 

[ousooner2]

REW is a free download from Home Theater Shack. With this you should get the Mini DSP UMIK-1 from Cross Spectrum Labs. You'll still need the SPL meter to calibrate the REW SPL readings for absolute scale, but that is not a mandatory step.

Since this is a USB mic, you'll be limited to 15 ft. cable length. You could get a laptop into the room where the speakers are located.

Thanks. I'll have a look. Picking up a cheap laptop or borrowing one for some initial measurements wouldn't be hard

 

[ski2xblack]

Any output at all from the tweeters?

 

[ousooner2]

Yeah I can hear output

 

[ski2xblack]

How long ago was the party? This sounds like the results of cavalier use of the volume knob.

 

[ousooner2]

Lol never had a party at this house or with these speakers. Even then, the tweeter is crossed at 3kHz so its not the tweeter alone. Plus this pattern happens on every single speaker.... And from 1 foot or 1 meter or 12 feet away so it's not a room issue. I'm at a loss

Could this be an AVR issue? I'm still under warranty through Denon

 

[agarwalro]

Same trend on all speakers from different measurement locations... It would be unlikely that all have the same fault. I wonder if the SPL meter is faulty. Since this is the easiest to replace, why not start with it?

 

[AcuDefTechGuy]

Did you use Dynamic EQ? That will improve your bass.

 

[ousooner2]

Same trend on all speakers from different measurement locations... It would be unlikely that all have the same fault. I wonder if the SPL meter is faulty. Since this is the easiest to replace, why not start with it?

Yeah I'm taking it in today to exchange. Just right down the road so that helps.

Did you use Dynamic EQ? That will improve your bass.

I do use Dynamic EQ. I'm going to have to look at my lower end again. Just took a few quick measurements and I can remember if those were with dyn eq on or off. I gave until mid Jan for my AVR warranty so hopefully I can figure out the issue soon.

 

[agarwalro]

Did you use Dynamic EQ? That will improve your bass.

We should have caught this sooner. Good call.

I do use Dynamic EQ. I'm going to have to look at my lower end again. Just took a few quick measurements and I can remember if those were with dyn eq on or off.

Do a set with Pure Direct engaged. Though the room may produce big swings in levels, this will remove the receiver as a variable.

Next do one with only Audyssey Flat engaged. This should give the least amount of variation in levels.

 

[ousooner2]

Little one is asleep right now so I'm going to have to do the tests later. I'll update when I run them

 

[ski2xblack]

Good catch on possible upstream issues. I had assumed you were doing your tests on a non-eq'd signal. Let us know how it goes.

 

[ousooner2]

So doing it in PURE DIRECT would take out the possibility of it being the AVR? I don't see how. I know it disables all internal DSP, etc etc...but would that really rule it out? If so, that's great. I'll give it a whirl. Daughter woke up, but momma decided it was time to take some X-mas pictures of her haha.....and now she's back asleep.

 

[ski2xblack]

It would indicate that the processing is responsible for applying the severe high freq roll off you've measured. If your highs return in pure direct, at least it will help determine if your speakers are functioning properly. Could end up being a bum Audyssey mic sending false high readings, and Audyssey is just trying to correct for that bad input.

 

[ousooner2]

I will try that, but I don't think that's the problem. When I run MultEQ XT and look at what it did....it boost the top end like CRAZY. I'm talking 3-6dB across the ENTIRE tweeter section. I'll take a pic real quick and try PURE DIRECT

 

[ski2xblack]

So what happened? Did you hear or measure the treble boost Audyssey applied? If everything is working you should have.

But it's more important to measure without eq compounding your spl meter's already nonlinear response. Did you measure anything resembling a flat extended response in pure direct? Hope so. Do you have anything other than the Denon to test the speakers with?

 

[ousooner2]

I've been ridiculously busy with work and the little one lately. A 4 month old is hard work! Not to mention it's been about 2 degrees here so that kind of sucks the life out of ya lol

I have NOT measured in Pure Direct yet. Measurements above were obviously with no EQ applied. I will do this measurement when I get home. I didn't return the SPL meter because it was like a month past their 90 day return policy, so I'm going to see if it's remotely close to a few Android spl meter apps to get an idea

 

[ousooner2]

So with PURE DIRECT engaged & measurements taken from roughly 1.5-2' away @ tweeter height:

*these numbers are corrected from the SPL meter

5kHz: 74dB
6.3kHz: 52dB
8kHz: 43dB


Same thing. When I get within a few inches of the tweeter I can get 6.3kHz and 8kHz to give me 75dB-ish, which would make more sense....but obviously I don't listen from 3" away.




With PURE DIRECT engaged, measurements taken from 2' away @ tweeter height using sine waves:


1kHz: 75dB
2kHz: 69dB
3kHz: 71dB
5kHz:74dB
10kHz: 41dB

 

[charmerci]

Check out this chart which shows where instruments' frequency range is. Frankly, there's not much output above 5K.

http://www.independentrecording.net/irn/resources/freqchart/images/main_chart.jpg

 

[DannyA]

Cool chart!