Listen to my sub

mikee55 · 13th August 2007, 01:02 PM

Whats it doing???????

Mike

rabbitz · 13th August 2007, 02:23 PM

Rubbing voice coil? Does it make any noise when you push the driver by hand? Spider intact?

Sounds like it needs to be put out of it's misery.

Cal Weldon · 13th August 2007, 02:45 PM

Strange sound. Did you overheat it?

mikee55 · 13th August 2007, 06:24 PM

The woofer is fine physicaly.Its got 300w written on it. I don't have an amp that big. I'm using a Linkwitz Transform after a 24db 40hz lowpass filter. Its tuned to 20hz.
Whats the best way to measure for voltages in LT?

Driving me up the wall.

pinkmouse · 13th August 2007, 06:29 PM

EQ breaking into oscillation?

mikee55 · 13th August 2007, 06:38 PM

With limited test gear, DMM and a 24bit soundcard on my PC. Could download scope/oscillator software, how can I test that theorey? Would the speaker have to be attached, thats probably a dumb question, but the missus will probably get arsey, if I set it up in the kitchen

Tell me! Please!!

Mike

ocool_15 · 13th August 2007, 08:23 PM

Not sure if it helps but the content starts at 403.2hz( on a 1/24 octave rta) with harmonics (806.3, 1208, 1613 ect). Sounds like feedback/ oscillation problem.

mikee55 · 13th August 2007, 08:42 PM

Sorry, although its a .wav file, it was done with an mp3 recorder.Sorry, shoot me. Im gonna run in on my pc and try for a visual of some kind.

cheers
Mike

pinkmouse · 13th August 2007, 09:03 PM

How much gain are you running with your LT?

theAnonymous1 · 13th August 2007, 09:16 PM

Quote:

Originally posted by pinkmouse
How much gain are you running with your LT?

18.56dB

13th August 2007, 02:45 PM	#3
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Strange sound. Did you overheat it? __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

13th August 2007, 06:24 PM	#4
mikee55 diyAudio Member Join Date: Dec 2005 Location: West Howe	Hello The woofer is fine physicaly.Its got 300w written on it. I don't have an amp that big. I'm using a Linkwitz Transform after a 24db 40hz lowpass filter. Its tuned to 20hz. Whats the best way to measure for voltages in LT? Driving me up the wall. __________________ If it don't work, I'll fix it in the mix! Or visit http://lsdp.proboards.com/index.cgi

13th August 2007, 06:29 PM	#5
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	EQ breaking into oscillation? __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

13th August 2007, 06:38 PM	#6
mikee55 diyAudio Member Join Date: Dec 2005 Location: West Howe	Okay With limited test gear, DMM and a 24bit soundcard on my PC. Could download scope/oscillator software, how can I test that theorey? Would the speaker have to be attached, thats probably a dumb question, but the missus will probably get arsey, if I set it up in the kitchen Tell me! Please!! Mike __________________ If it don't work, I'll fix it in the mix! Or visit http://lsdp.proboards.com/index.cgi

13th August 2007, 08:42 PM	#8
mikee55 diyAudio Member Join Date: Dec 2005 Location: West Howe	Oh poo Sorry, although its a .wav file, it was done with an mp3 recorder.Sorry, shoot me. Im gonna run in on my pc and try for a visual of some kind. cheers Mike __________________ If it don't work, I'll fix it in the mix! Or visit http://lsdp.proboards.com/index.cgi


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13th August 2007, 02:23 PM	#2
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Rubbing voice coil? Does it make any noise when you push the driver by hand? Spider intact? Sounds like it needs to be put out of it's misery.

13th August 2007, 08:23 PM	#7
ocool_15 diyAudio Member Join Date: Nov 2004 Location: sk	Not sure if it helps but the content starts at 403.2hz( on a 1/24 octave rta) with harmonics (806.3, 1208, 1613 ect). Sounds like feedback/ oscillation problem.

13th August 2007, 09:03 PM	#9
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	How much gain are you running with your LT? __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

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