Symptom Diagnosis please?

panos29 · 18th April 2003, 03:46 PM

After a short play with my fynction generator in one of my two 15" Tannoy monitor I found that while in 100Hz raising the volume beyond a sertain point the sound comes a bit distorted, like a higher frequency is introduced together with the 100Hz(compared to the other. Any hints of what that may be? Maybe a loose turn on the voice coil? Any loudspeaker expert in here lease help! I am really desperate!

Sincerely,

Panos

JOE DIRT® · 18th April 2003, 03:55 PM

check both Drivers after the crossover and compare thats a good start

Cheers!!The DIRT®

panos29 · 18th April 2003, 03:57 PM

My mistake! Forgot to mention that the test was done free air (on my bad) without the use of any kind of crossover. The differense is very obvious during the test between the two drivers.

JOE DIRT® · 18th April 2003, 03:59 PM

did you measure both voice coil resistances with a meter?

panos29 · 18th April 2003, 04:06 PM

I did, both measure 6.5 Ohms and there absolutely no scratch when pushing in or pulling out the cones.

JOE DIRT® · 18th April 2003, 04:13 PM

well I must admit you have me stumped.....why did you test the speakers...was there a problem when listening to music?? any input from members here would be appreciated

Cheers!!The DIRT®

panos29 · 18th April 2003, 04:20 PM

Actually I noticed during loud passages of electric guitar and specifically at the beginning of brothers in arms frrom dire straits that the small solo was a bit distorted so I switched to mono and listen the same just changing speakers. The feeling is like tha amplifier distorts somewhat more than usuall. But its now definitely the speaker that looses control at 100Hz as tested afterwards.

JOE DIRT® · 18th April 2003, 04:25 PM

I`m afraid my friend that the driver might in need of repair from what you have told me...I`m sorry i cant help you further....maybe someone else has another idea

Cheers!!The DIRT®

panos29 · 18th April 2003, 04:29 PM

Dear Joe,
I really thank you for taking the time to answer to my question, I am afraid this is the case and although this is a very easy driver to take apart its extremely costly and hard to find spare parts. Damn, use to love that driver.

Thanks again

JOE DIRT® · 18th April 2003, 04:31 PM

maybe someone here could help you out getting parts at a decent price>???

18th April 2003, 03:46 PM	#1
panos29 diyAudio Member Join Date: Dec 2001 Location: ATHENS, GREECE	Symptom Diagnosis please? After a short play with my fynction generator in one of my two 15" Tannoy monitor I found that while in 100Hz raising the volume beyond a sertain point the sound comes a bit distorted, like a higher frequency is introduced together with the 100Hz(compared to the other. Any hints of what that may be? Maybe a loose turn on the voice coil? Any loudspeaker expert in here lease help! I am really desperate! Sincerely, Panos

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18th April 2003, 03:55 PM	#2
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	check both Drivers after the crossover and compare thats a good start Cheers!!The DIRT®

18th April 2003, 03:57 PM	#3
panos29 diyAudio Member Join Date: Dec 2001 Location: ATHENS, GREECE	My mistake! Forgot to mention that the test was done free air (on my bad) without the use of any kind of crossover. The differense is very obvious during the test between the two drivers.

18th April 2003, 03:59 PM	#4
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	did you measure both voice coil resistances with a meter?

18th April 2003, 04:06 PM	#5
panos29 diyAudio Member Join Date: Dec 2001 Location: ATHENS, GREECE	I did, both measure 6.5 Ohms and there absolutely no scratch when pushing in or pulling out the cones.

18th April 2003, 04:13 PM	#6
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	well I must admit you have me stumped.....why did you test the speakers...was there a problem when listening to music?? any input from members here would be appreciated Cheers!!The DIRT®

18th April 2003, 04:20 PM	#7
panos29 diyAudio Member Join Date: Dec 2001 Location: ATHENS, GREECE	Actually I noticed during loud passages of electric guitar and specifically at the beginning of brothers in arms frrom dire straits that the small solo was a bit distorted so I switched to mono and listen the same just changing speakers. The feeling is like tha amplifier distorts somewhat more than usuall. But its now definitely the speaker that looses control at 100Hz as tested afterwards.

18th April 2003, 04:25 PM	#8
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	I`m afraid my friend that the driver might in need of repair from what you have told me...I`m sorry i cant help you further....maybe someone else has another idea Cheers!!The DIRT®

18th April 2003, 04:29 PM	#9
panos29 diyAudio Member Join Date: Dec 2001 Location: ATHENS, GREECE	Dear Joe, I really thank you for taking the time to answer to my question, I am afraid this is the case and although this is a very easy driver to take apart its extremely costly and hard to find spare parts. Damn, use to love that driver. Thanks again

18th April 2003, 04:31 PM	#10
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	maybe someone here could help you out getting parts at a decent price>???