So, You Say You Want To Graph Your Sub's FR, HUH?
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Joined: Dec 2003
Posts: 6,331
axiomite
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OP
axiomite
Joined: Dec 2003
Posts: 6,331 |
Well I downloaded the Real Traps Test Tone CD which has tones in 1Hz increments from 10 to 300 Hz. That's right, each tone is 1Hz different from the previous tone, and the next. There are 29 tracks with 10 tones on each track, i.e., Track 1 has tones from 10 to 19 Hz with each tone lasting 10 seconds. Just enough time to read the meter and write down the reading. It turned out to be a great way to discover things in my apartment that rattle. I still haven't tracked them all down yet, BUT I WILL!
Jack
"People generally quarrel because they cannot argue." - G. K. Chesterton
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Re: So, You Say You Want To Graph Your Sub's FR, HUH?
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Joined: Sep 2004
Posts: 11,458
shareholder in the making
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shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
I was gonna send you the bass tones CD I created last week, as well as a .PDF of the corresponding chart with track numbers and "adjustment factors" as well as two more CDs I made of bass-interesting tracks for testing.
I was going to have them delivered by a gaggle of Hooters girls, too. With a draft in each hand.
Then you made that "dumb" comment in the other thread and I canceled the whole thing. Gave him Ray's address instead 'cuz he's nice to me.
Oh, wait. He's not nice to me either.
Come to think of it, why do I hang around here?
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
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Re: So, You Say You Want To Graph Your Sub's FR, HUH?
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Joined: Jan 2004
Posts: 3,016
connoisseur
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connoisseur
Joined: Jan 2004
Posts: 3,016 |
In reply to:
why do I hang around here
are you a glutton for punishment?
i meant "freak" in the nicest possible way....
bigjohn
EXCUSE ME, ARE YOU THE SINGING BUSH??
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Re: So, You Say You Want To Graph Your Sub's FR, HUH?
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Joined: Sep 2004
Posts: 11,458
shareholder in the making
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shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
Sure.
Guys, I'm here to tell you that as an experienced photographer and Photoshop user, those grills really ARE pink. It wasn't a color cast in that photo!
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
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Re: So, You Say You Want To Graph Your Sub's FR, H
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Joined: Apr 2003
Posts: 16,441
shareholder in the making
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shareholder in the making
Joined: Apr 2003
Posts: 16,441 |
Thanls for the link, Jack. I just burned the test disc. Not sure when I'll get around to using it though. I have no means of correcting my sub's response at the moment, so I'm not sure I want to find out!
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Re: So, You Say You Want To Graph Your Sub's FR, H
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Joined: Dec 2003
Posts: 6,331
axiomite
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OP
axiomite
Joined: Dec 2003
Posts: 6,331 |
You're welcome, Peter. Ignorance IS bliss. Well, as I said, even if you don't use the tones to crate a graph, you can run around the room trying to pinpoint what the heck is doing all that rattling. And with that nice SVS you have, I'd be surprised if SOMETHING wasn't rattling.
Mark, you know we love you. I NEVER pick on anybody I don't love.
Jack
"People generally quarrel because they cannot argue." - G. K. Chesterton
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Re: So, You Say You Want To Graph Your Sub's FR, H
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Joined: Mar 2005
Posts: 285
local
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local
Joined: Mar 2005
Posts: 285 |
Thanks also from me for the link.
Like Peter, I have no electronic solution for any wild dips and spikes. Not knowing much about such finer points of audio like this (but learning for you all), would moving the sub around relative to the fixed dimensions of the room likely change the curve much?
paul
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Re: So, You Say You Want To Graph Your Sub's FR, H
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Joined: May 2003
Posts: 1,501
connoisseur
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connoisseur
Joined: May 2003
Posts: 1,501 |
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Re: So, You Say You Want To Graph Your Sub's FR, H
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Joined: Mar 2005
Posts: 285
local
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local
Joined: Mar 2005
Posts: 285 |
Curtis - thanks, I'll check it out.
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Re: So, You Say You Want To Graph Your Sub's FR, H
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Joined: Aug 2004
Posts: 6,379 Likes: 7
axiomite
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axiomite
Joined: Aug 2004
Posts: 6,379 Likes: 7 |
>>would moving the sub around relative to the fixed dimensions of the room likely change the curve much?
Absolutely -- it's just harder to predict what the results of each move will be. There are a FEW tricks you can do that are somewhat predictable, like positioning the sub X distance from a wall so that the distance to the wall and back is 1/2 wavelength of the frequency where you have a peak, but there usually aren't enough variables to fix all your response bumps.
Hey, I wonder how well an instrumented sub crawl would work ? Put the sub in your listening position, move the mike around the room and find the spot with the best response, then place your sub in that spot and take back your listening position ?
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39 M5HP, M40ti, Sierra-1 LFR1100 active, ADA1500-4 and -8
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