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#32871 - 02/05/04 03:58 PM Re: Tweak, stupid or not.
pmbuko Offline
shareholder in the making

Registered: 04/02/03
Posts: 16227
Loc: Leesburg, Virginia
With tube electronics, I can understand wanting to damp vibration. Tubes are sensitive devices with many precisely aligned delicate parts.

Also I can understand wanting to damp CD players because they involve mechanical motion and sometimes even small jarring can produce read errors.

But when it comes to solid-state electronics -- like an amp or receiver -- I do not understand how typical vibrations can affect the sound. I suppose one way to test this would be to subject a receiver to vibrations far and above what it would ever experience in real-world situations and measure its output for fluctuations.
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"I wish I had documented more…" said nobody on their death bed, ever.

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#32872 - 02/05/04 04:39 PM Re: Tweak, stupid or not.
johnbasham Offline
old hand

Registered: 06/23/03
Posts: 93
Loc: Tulsa
Thanks 2X6,
Decided to give this a try even thought most of the responses weren't to positive, figured what the heck, at 1.95 a sheet it can't hurt. Even contacted the manufacturer
to get there take and the person in tech service responded that it was a great idea because to keep cost low alot of times the chassis is one area manufacturers look to first.
So the results, to me it seems that things have become a LITTLE clearer, especially in the lower end, so I feel that at 1.95 this was worth it.
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"One needs to crawl thru the darkness to stand in the light"

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#32873 - 02/05/04 05:09 PM Re: Tweak, stupid or not.
BrenR Offline
connoisseur

Registered: 12/10/03
Posts: 3602
Loc: Winnipeg MB Canada
In reply to:

Is Bren the nice fella who works for Axiom?



Nope, Bren's completely unaffiliated with Axiom, maybe you were talking to Joe?

The only thing Axiom and I have in common is we're both in Canada, and I'll be buying my 5.1 setup from them.

I'm in design for print and broadcast and just happen to know some audio theory from working so closely with broadcast audio techs and engineers and reading the manuals and theory books on breaks (nothing like sitting around a table talking shop with guys retired from the CBC, real audio pioneer types - either you learn a LOT, FAST or you end up sitting there with your hands in your lap)

Bren R.

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#32874 - 02/05/04 09:33 PM Re: Tweak, stupid or not.
Saturn Offline
connoisseur

Registered: 10/21/02
Posts: 1041
Loc: Toronto Ontario Canuck
In reply to:

Is Bren the nice fella who works for Axiom?




That person from Axiom is Brent Tombari. He is a great guy. Looked after my order during a mix up.
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#32875 - 02/05/04 11:10 PM Re: Tweak, stupid or not.
Raindance Offline
veteran

Registered: 11/30/03
Posts: 170
Loc: Minnesota
"But when it comes to solid-state electronics -- like an amp or receiver -- I do not understand how typical vibrations can affect the sound."

PMB, it all goes back to the doppler effect-- vibrations in solid state electronics (especially the amp) can create concentrated waves of electrons (followed by a period of electron sparseness), creating an uneven siren-like effect when these bursts hit the speakers. It's like shaking and squeezing a ketchup bottle at the same time!



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#32876 - 02/06/04 12:07 AM Re: Tweak, stupid or not.
pmbuko Offline
shareholder in the making

Registered: 04/02/03
Posts: 16227
Loc: Leesburg, Virginia
What you describe sounds like what might occur when the vibrations are parallel to the flow of electrons. But what happens when the vibrations are perpendicular to the electron flow? Does the signal bandwidth undergo periodic compression and expansion resulting in a wah-pedal effect?
_________________________
"I wish I had documented more…" said nobody on their death bed, ever.

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#32877 - 02/06/04 12:24 AM Re: Tweak, stupid or not.
2x6spds Offline
connoisseur

Registered: 03/16/02
Posts: 2726
Loc: CA, USA
Oooh. Maybe dynamat and vibrapods aren't so dumb after all?
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Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.

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#32878 - 02/06/04 12:58 AM Re: Tweak, stupid or not.
Raindance Offline
veteran

Registered: 11/30/03
Posts: 170
Loc: Minnesota
I think it would!

Either that, or (especially if you were using too heavy gauge of speaker wire) electrons might bounce crazily through the wire and get lost. I've heard that's more likely to happen to the electrons carrying the higher frequencies, as they have less momentum than the others.

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#32879 - 02/06/04 01:00 AM Re: Tweak, stupid or not.
BrenR Offline
connoisseur

Registered: 12/10/03
Posts: 3602
Loc: Winnipeg MB Canada
In reply to:

It's like shaking and squeezing a ketchup bottle at the same time!



Except electrons aren't liquid...

And the doppler effect refers to sound waves compressing as they approach the listener (resulting in a higher frequency) and expanding as they move away from the listener (resulting in a lower frequency) - like when a car races by you as you face it... the pitch of the engine appears to become higher as it gets closer, then drop off as it passes you... I'm not sure how you related this to vibrations within a solid state amp, unless you feel the vibrations squeeze the traces and components, reducing electrical flow?!?

I'm sure we can all agree that shaking even a solid state amp isn't advisable, the only thing I'd worry about is shaking trim pots off calibration or over time loosening components, but a sheet of vulcanized truck bed liner stuck to the underside of the case isn't going to prevent any of that... maybe if you stuck a vulcan under there... highly illogical.

Bren R.

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#32880 - 02/06/04 01:04 AM Re: Tweak, stupid or not.
Raindance Offline
veteran

Registered: 11/30/03
Posts: 170
Loc: Minnesota
Hehe. I was kidding, actually.

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