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The following page was printed from RemoteCentral.com:
| Topic: | NUVO AMP (singing) This thread has 11 replies. Displaying all posts. |
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| Post 1 made on Monday March 17, 2014 at 16:00 |
Mr. Stanley Elite Member |
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Posts: | January 2006
16,954 |
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Have a NUVO amp that you can actually hear music coming from it's chassis? Transformer?
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"If it keeps up, man will atrophy all his limbs but the push-button finger."
Frank Lloyd Wright
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| Post 2 made on Monday March 17, 2014 at 16:25 |
bcf1963 Super Member |
Joined:
Posts: | September 2004
2,767 |
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It can be the transformer, but since the NUVO amps are Class D, I'm guessing the offending components are ceramic capacitors.
Ceramic capacitors are prone to this, when subjected to very repetitive high frequencies, as you might find in a Class D amp. The capacitor actually changes dimensions very slightly as it is charged and discharged. This coupled with the fact that a surface mount capacitor is mounted by it's two ends, can make the circuit board act like a sounding board in a piano, amplifying the sound. If this is in a location where it is very noticeable, you can often reduce or eliminate it, by changing the abiliity to couple sound to the PCB.
If you can find the offending components by pressing on them with your finger (make sure there are no high voltages exposed on the board before doing this), and when you find a component with an issue, the tone or volume will usually change. Often a bit of superglue where the back of the component almost touches the circuit board, will change the characteristics enough to silence the problem. Just make sure to turn off the device, and use the cyanoacrylate when powered off, and let it dry before turning it back on. If you put it in place with the device making the sound, the cyanoacrylate will be vibrated away from the area it needs to fill, to remedy the problem.
There are design techniques we use in devices to eliminate this problem, but lots of companies who haven't run into these issues, have this crop up.
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| Post 3 made on Monday March 17, 2014 at 16:39 |
Mogul Senior Member |
Joined:
Posts: | May 2010
1,164 |
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I have a SpeakerCraft MZC-64 in the field that does this...It's somewhat disconcerting, though apparently harmless.
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"Whatever is rightly done, however humble, is noble." [Sir Henry Royce] |
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| OP | Post 4 made on Monday March 17, 2014 at 17:38 |
Mr. Stanley Elite Member |
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Posts: | January 2006
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On March 17, 2014 at 16:39, Mogul said...
I have a SpeakerCraft MZC-64 in the field that does this...It's somewhat disconcerting, though apparently harmless. Yeah when I worked at Phase Linear we had a lot of amps that would do this... No biggie, but this Nuvo pice has other issues...
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"If it keeps up, man will atrophy all his limbs but the push-button finger."
Frank Lloyd Wright
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| Post 5 made on Monday March 17, 2014 at 18:21 |
Eastside A/V Select Member |
Joined:
Posts: | September 2006
1,782 |
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Are there 70v speakers in the system? I found a system where a Crown CDI1000 was singing once; turned out the output ended up getting crossed, and fed back into the amp.
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| OP | Post 6 made on Monday March 17, 2014 at 18:48 |
Mr. Stanley Elite Member |
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Posts: | January 2006
16,954 |
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On March 17, 2014 at 18:21, Eastside A/V said...
Are there 70v speakers in the system? I found a system where a Crown CDI1000 was singing once; turned out the output ended up getting crossed, and fed back into the amp. nope
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"If it keeps up, man will atrophy all his limbs but the push-button finger."
Frank Lloyd Wright
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| Post 7 made on Monday March 17, 2014 at 19:33 |
twmoonly Long Time Member |
Joined:
Posts: | October 2010
197 |
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I believe this is common with the Nuvo amps. We have several out and they all do this and we haven't had any fail n
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| OP | Post 8 made on Monday March 17, 2014 at 19:46 |
Mr. Stanley Elite Member |
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Posts: | January 2006
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On March 17, 2014 at 19:33, twmoonly said...
I believe this is common with the Nuvo amps. We have several out and they all do this and we haven't had any fail n Interesting.
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"If it keeps up, man will atrophy all his limbs but the push-button finger."
Frank Lloyd Wright
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| Post 9 made on Tuesday March 18, 2014 at 01:23 |
Ernie Gilman Yes, That Ernie! |
Joined:
Posts: | December 2001
30,076 |
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On March 17, 2014 at 16:25, bcf1963 said...
If you can find the offending components by pressing on them with your finger (make sure there are no high voltages exposed on the board before doing this), Killjoy. We always want another over the top Mr. Stanley story. There are design techniques we use in devices to eliminate this problem, but lots of companies who haven't run into these issues, have this crop up. This also puts bcf and his company way above NuVo in this regard.
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A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw |
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| Post 10 made on Tuesday March 18, 2014 at 10:41 |
Neurorad Super Member |
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Posts: | September 2007
3,011 |
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Thanks, bcf1963. Interesting.
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TB A+ Partner
Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense. -Buddha |
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| Post 11 made on Tuesday March 18, 2014 at 11:52 |
Ernie Gilman Yes, That Ernie! |
Joined:
Posts: | December 2001
30,076 |
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It's pretty interesting to see that NuVo has finally perfected the singing amp, though. Up to now no electronic equipment has been able to do more than hum. NuVo has taught them the words!
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A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw |
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| Post 12 made on Tuesday March 18, 2014 at 11:58 |
Fred Harding Super Member |
Joined:
Posts: | October 2001
3,430 |
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Volume controls frequently can provide rhythm...
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On the West Coast of Wisconsin |
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