Film-Tech Forum ARCHIVE: Test for damaged speaker?

This is topic Test for damaged speaker? in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Wolff King Morrow (Member # 2226) on 02-24-2004, 05:16 PM:

Edit:

My apologies for editing my posts. I was informed by my employers that I am not allowed to discuss anything pertaining to operation, proceedures, profits, or wages of the company I work for on this or any other public media. Please note I was NOT aware of such a policy, so I apologize for the disruption of the thread.

Thanks for your understanding on this. -Wolff

[ 03-02-2004, 09:39 PM: Message edited by: Wolff King Morrow ]

Posted by Edward Jurich (Member # 1787) on 02-24-2004, 06:07 PM:

A tone generator wired so you could take it into the auditorium would be helpful. Sweeping frequencies might bring out a speaker problem.
Also, if just one surround speaker is cutting out I wouldn't think it would be that noticeable like if a left, center or right speaker went out. If several surround speakers are cutting out than you might have a wiring or amp problem.

Posted by Michael Schaffer (Member # 1204) on 02-24-2004, 07:13 PM:

As always, it would be best if you let us know what hardware you have. Some sound processors can generate test signals on their own.

Posted by Wolff King Morrow (Member # 2226) on 02-25-2004, 01:54 AM:

Edit:

My apologies for editing my posts. I was informed by my employers that I am not allowed to discuss anything pertaining to operation, proceedures, profits, or wages of the company I work for on this or any other public media. Please note I was NOT aware of such a policy, so I apologize for the disruption of the thread.

Thanks for your understanding on this. -Wolff

[ 03-02-2004, 09:40 PM: Message edited by: Wolff King Morrow ]

Posted by Michael Schaffer (Member # 1204) on 02-25-2004, 04:36 AM:

None of these components can produce their own test tones. But you could move the DTS processor to that auditorium and play the setup disc (available as image here). That would seem to me to be the easiest solution with what you have. Or if you have a notebook and a sound editing program, you can make test tones and particularly a sine sweep and play it from the notebook into the external input or directly into the amps.

Posted by Wolff King Morrow (Member # 2226) on 02-25-2004, 06:43 AM:

Edit:

My apologies for editing my posts. I was informed by my employers that I am not allowed to discuss anything pertaining to operation, proceedures, profits, or wages of the company I work for on this or any other public media. Please note I was NOT aware of such a policy, so I apologize for the disruption of the thread.

Thanks for your understanding on this. -Wolff

[ 03-02-2004, 09:41 PM: Message edited by: Wolff King Morrow ]

Posted by Gordon McLeod (Member # 33) on 02-25-2004, 09:34 AM:

The USL DSP60 should produce internal pinknoise
First using the monitor determin if the signal is disapearing at the output of the processor or the amp by monitoring that channel when a complaint comes in

Posted by Larry Zuverink (Member # 1483) on 02-25-2004, 01:31 PM:

Band limited pink noise makes it a lot easier to hear distortion. Have your tech make sure that the inputs to the SA10 are not being over driven. We had a similar problem and it turned out someone had original set up EX incorrectly.

Posted by Wolff King Morrow (Member # 2226) on 02-26-2004, 12:55 AM:

Edit:

My apologies for editing my posts. I was informed by my employers that I am not allowed to discuss anything pertaining to operation, proceedures, profits, or wages of the company I work for on this or any other public media. Please note I was NOT aware of such a policy, so I apologize for the disruption of the thread.

Thanks for your understanding on this. -Wolff

[ 03-02-2004, 09:41 PM: Message edited by: Wolff King Morrow ]

Posted by David Kilderry (Member # 142) on 02-26-2004, 07:20 AM:

My two essential items for sound and picture projection diagnostics are:

Dolby Jiffy Test Film

Spectra Cinespot Meter

If you can afford these two items and learn how to use them correctly, many mysteries will be revealed! Like how bad your sound and picture actually are!

I know they are out of reach of many small time exhibitors, but if you run a large multiplex or multiple locations, they are a necessity in my opinion. Your local theatre supplier will have these items if they are worth their salt.(other brands of light meter are acceptable of course as long as they are for cinema use).

David

Posted by Alan Haigh (Member # 1781) on 02-26-2004, 07:23 AM:

All test materials, films, disks etc. should feature solo piano music, preferably in stereo, then in mono on each channel in turn.

Just a wish of mine for the future...

Alan

Posted by Bruce McGee (Member # 131) on 02-27-2004, 07:04 PM:

You still can have a bad amplifier. I've seen many amps simply cut out or distort out after they get hot, or warmed up.

Posted by Wolff King Morrow (Member # 2226) on 02-28-2004, 02:55 AM:

Edit:

My apologies for editing my posts. I was informed by my employers that I am not allowed to discuss anything pertaining to operation, proceedures, profits, or wages of the company I work for on this or any other public media. Please note I was NOT aware of such a policy, so I apologize for the disruption of the thread.

Thanks for your understanding on this. -Wolff

[ 03-02-2004, 09:41 PM: Message edited by: Wolff King Morrow ]