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"OMFG, Krypto is getting a mic finally!" - Page 10

post #271 of 464
3/21/11 at 4:09pm
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changed it to 130, added the mic correction file,

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post #272 of 464
3/21/11 at 4:10pm
That's more like it.
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post #273 of 464
3/21/11 at 4:10pm
Thread Starter 
Quote:
Originally Posted by lilmike View Post

Getting closer - see how the top of the plot is clipped off? We want to get that data back on the screen - so let's make the top limit 130 and the bottom 110 dB.

By the way - I'm jealous... My sub seems "inadequate" in comparison....

finally a step ahead of ya, I didnt bring the bottom up though. keep in mind the correction file over exaggerates
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post #274 of 464
3/21/11 at 4:16pm
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Quote:
Originally Posted by Scott Simonian View Post

That's more like it.

backed her down 10dB like you said, -35dB

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post #275 of 464
3/21/11 at 4:21pm
Yeah, I know. I use several of those meters. Hated the idea that I needed a 20 dB "correction" to measure a subwoofer so I "fixed" it. Now it is flatter than my sound card.

That's some solid performance none the less. Judging by the phase flip, the tune is around 11 hz.
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post #276 of 464
3/21/11 at 4:29pm
My cabs are always available to copy.
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post #277 of 464
3/21/11 at 4:30pm
Thread Starter 
Quote:
Originally Posted by lilmike View Post

Yeah, I know. I use several of those meters. Hated the idea that I needed a 20 dB "correction" to measure a subwoofer so I "fixed" it. Now it is flatter than my sound card.

That's some solid performance none the less. Judging by the phase flip, the tune is around 11 hz.

:-O yeeeah! Ive ben jelous all along that scott is at 11 and I am way up at 14! WTF?!?!

OK, I want to blast it now at -20dB master, I set the mic to 110, when it makes *pink* *white* noise it averages +1dB, 10 111dB. I saved that, ran it, no headroom...how do I fix that?

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post #278 of 464
3/21/11 at 4:38pm
Thread Starter 
when I have the mic set to 120 and I test, the metere barely moves... so I back it down to 110 but then the Check Levels fails. Back to 120 and Check Levels is green, 20db. back to 110, red Too High -9.x.

When i sweep now, master -20dB ( LOUD ) its lower than earlier
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post #279 of 464
3/21/11 at 4:41pm
Thread Starter 
metere 120 master volume -20dB

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post #280 of 464
3/21/11 at 5:04pm
Quote:
Originally Posted by kryptonitewhite View Post

when I have the mic set to 120 and I test, the metere barely moves... so I back it down to 110 but then the Check Levels fails. Back to 120 and Check Levels is green, 20db. back to 110, red Too High -9.x.

When i sweep now, master -20dB ( LOUD ) its lower than earlier

Welcome to the wonders of working with an RS meter.

Set it on the 120 dB range, calibrate it as best you can (level >115 dB so you can read it), then run your sweeps. So long as you're within 10 to 20 dB you're fine. The needle does not have to move for there to be a signal at the output port.

Can you include phase in a plot at a scale that I can see? The phase "flip" correlates to the enclosure tune for a ported cabinet.
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post #281 of 464
3/21/11 at 5:09pm
KW, Under the limits setting change you left freq. to 5 and you right to 100, same way you changed your db scale.
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post #282 of 464
3/21/11 at 5:13pm
Quote:
Originally Posted by kryptonitewhite View Post

when I have the mic set to 120 and I test, the metere barely moves... so I back it down to 110 but then the Check Levels fails. Back to 120 and Check Levels is green, 20db. back to 110, red Too High -9.x.

When i sweep now, master -20dB ( LOUD ) its lower than earlier


Quote:
Originally Posted by notnyt View Post

Don't forget, once you have calibrated rew to the meter, if you change the dial setting on the meter, or the levels on your INPUT, you will have to recalibrate.

You can change the level on your receiver all you want.

Careful changing back and forth, it will alter your graphs. If you calibrate with the meter set to 120, then change the meter to 110, your readings in rew will read very high =]

And as others have mentioned, change the right side of the graph to either 200 or 100

Also, something amusing you can try to validate the results of the meter. I used my Audyssey mic for measurements to see how it was without any correction table, and it seemed to be very flat down to at least 10hz. You won't know the correct level, but it should at least help validate the fr curve.
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post #283 of 464
3/21/11 at 8:35pm
Thread Starter 
alright, -11dB master volume, had to expand to 130dB. tried scrolling this and that to see things better





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post #284 of 464
3/21/11 at 8:36pm
Muthaf**kin' yes! That's incredible!

I like.
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post #285 of 464
3/21/11 at 8:38pm
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Quote:
Originally Posted by wembley2000 View Post
KW, Under the limits setting change you left freq. to 5 and you right to 100, same way you changed your db scale.
just saw this...
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post #286 of 464
3/21/11 at 8:46pm
Thread Starter 
tried Audyssey mic

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post #287 of 464
3/21/11 at 8:47pm
Thread Starter 
Quote:
Originally Posted by Scott Simonian View Post
Muthaf**kin' yes! That's incredible!

I like.
Scott, nobody believed me I tried and tried, made vids and vids, come on...when there were just TWO I did that 15Hz door flex... you could see through my door on the inward stroke! Well thanks to you, buddy, thanks to you
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post #288 of 464
3/21/11 at 8:48pm
Quote:
Originally Posted by kryptonitewhite View Post
tried Audyssey mic

Is it into mic input? did you start REW after having it plugged in?


Also, looks good, did you recalibrate the SPL level after switching the level to 120 on the meter?
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post #289 of 464
3/21/11 at 8:51pm
There you go Krypto, get them measurements! Damn, you really are blastin' those low frequencies out of those towers aren't ya'?.......
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post #290 of 464
3/21/11 at 8:53pm
Thread Starter 
Quote:
Originally Posted by notnyt View Post
Is it into mic input? did you start REW after having it plugged in?


Also, looks good, did you recalibrate the SPL level after switching the level to 120 on the meter?
I did it in line in while I was closed out of REW, Ill close out and try mic. Yep I recalibrated with it set to 120dB and left it. Just tried at -10dB master, I'm sure distortion and clipping has to be terrible because my lights were dimming at -13dB....

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post #291 of 464
3/21/11 at 8:54pm
Thread Starter 
Quote:
Originally Posted by goku14139268520 View Post
There you go Krypto, get them measurements! Damn, you really are blastin' those low frequencies out of those towers aren't ya'?.......
nah, those are my badass Walmart cubes... I have the EPs switched off

Have you checked into those Blueprint 1803s? I'm very sure you would love the snot out of those...
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post #292 of 464
3/21/11 at 8:56pm
If you want to see the effects of compression, take graphs every 5 db from like -40 on your receiver up to -10.

Display them all in the same graph "all spl".

Post away
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post #293 of 464
3/21/11 at 9:07pm
Thread Starter 
Put Audy mic on mic at -20dB and got this error, tried again at -30dB, same error, put it to -40 and realized my heater running is making it bounce...that sensitive...waiting to run at -40dB with Aud mic



OK, same at -40dB, somethings not right. Disconnect the SPL mic from LINE IN and put Audyssey into MIC?
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post #294 of 464
3/21/11 at 9:09pm
don't bother, just play with the SPL meter if you can't get that working, not worth wasting the time. Do the sweeps every 5db to see what compressions looking like.
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post #295 of 464
3/21/11 at 9:11pm
Quote:
Originally Posted by kryptonitewhite View Post
Put Audy mic on mic at -20dB and got this error, tried again at -30dB, same error, put it to -40 and realized my heater running is making it bounce...that sensitive...waiting to run at -40dB with Aud mic



OK, same at -40dB, somethings not right. Disconnect the SPL mic from LINE IN and put Audyssey into MIC?
They're wired differently, at least mine seems to be. I tried that already.

Working on a $10 mic option for folks though, no corrections needed for measuring subs till below when most sound cards start to roll off.
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post #296 of 464
3/21/11 at 9:13pm
with the Audy mic, I was able to take readings at 100db+, something wacky with your inputs or something. Anyway, let's see some sweeps / distortion measurements
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post #297 of 464
3/21/11 at 9:14pm
Thread Starter 
Quote:
Originally Posted by notnyt View Post
don't bother, just play with the SPL meter if you can't get that working, not worth wasting the time. Do the sweeps every 5db to see what compressions looking like.
Quote:
Originally Posted by lilmike View Post
They're wired differently, at least mine seems to be. I tried that already.

Working on a $10 mic option for folks though, no corrections needed for measuring subs till below when most sound cards start to roll off.
alright, I closed out, ill put the spl back on and start at -40dB and go till they blow... jk, jk. $10 mic like that put me down, I owe someone a gift card first then I'm on it
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post #298 of 464
3/21/11 at 9:16pm
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Quote:
Originally Posted by notnyt View Post
Anyway, let's see some sweeps / distortion measurements


I dont wanna
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post #299 of 464
3/21/11 at 9:19pm
Quote:
Originally Posted by kryptonitewhite View Post
alright, I closed out, ill put the spl back on and start at -40dB and go till they blow... jk, jk. $10 mic like that put me down, I owe someone a gift card first then I'm on it
It might be a week or three - cause you all know how fast I work. Already have a functional prototype though.

The little capsules are a little tricky to solder, but they work great. Linkwitz's mod makes them even better.
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post #300 of 464
3/21/11 at 9:30pm
Thread Starter 
oh am I ever upset! I went from -40 to -10 and managed to kiss bottom plate lightly, then after running them all, I see when I closed out it reset to 15Hz bottom! NOOOOO! But I hit 130dB! YEEEEAH!

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