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Old 22nd July 2003, 11:58 PM   #11
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Hi,

Quote:
I would check the cables and connectors for good physical connections and correct solder joints.
Tmac,

Are you sure you posted in the right thread?

Cheers,
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Old 23rd July 2003, 12:09 AM   #12
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Does it make any difference?

I think that I have heard some of this some where before.

Have a good one
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Old 23rd July 2003, 12:18 AM   #13
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Hi all,

The case resonance thing has always been a bit voodoo to me until just now...

Most commercial cases are made of steel for RFI requirements. The steel is also shields TVs, etc. from magnetic fields generated by equipment. A metal moving in a magnetic field induces currents. Motion that is cyclical, like resonance, creates AC currents, which can affect the equipment. Even if the fluctuations are on the order of 1x10E-12, that is a change of 36dB which can be heard by even by the non-golden ears.

:)ensen.
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Old 23rd July 2003, 12:41 AM   #14
sam9 is offline sam9  United States
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More seriously, not knowing anything about the amp in question I can see where there might be all manner of things that could go astray when it is placed on its side. Possibilities:

Inadequate coooling which has been associated (somewhere) with LF distortion.

Cables shifting about under their own weight could come too close to power source, the transformer, or the other channel.

The reverse of the above is also possible.

Flims boards, or inproperly secured boards or the components on those boards causing either the posative or negative effects just described.

Lesser or greater proximity of an external EMI/RFI source.

Each of these are in principle measurable and identifiable with sufficient time and test gear. You wouldn't even need to resort
to an ABX listening test to determine it.

I would rank the likely hood of the above or just the notorious placebos above solid state microphonics and other exotica.

BTW-- I just remebered an amp I had that would blow a fuse when placed on its side. Not as subtle as your situation!
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Old 23rd July 2003, 03:31 AM   #15
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Default Re: nonsense

Quote:
Originally posted by Ilianh

total nonsense

Fully agree with you.

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Old 23rd July 2003, 03:52 AM   #16
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Quote:
Originally posted by Ilianh

when it's in a vertical position

I imagined that you were arrrrrrguing with your girl friend who gave you an unacceptable comment about the stupid vertical look. Sure the amp sound was ...

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Old 25th July 2003, 09:03 AM   #17
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Default Re: nonsense

Quote:
Originally posted by Ilianh

Which is total nonsense..........

True....true.....
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Old 25th July 2003, 01:40 PM   #18
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Quote:
Wich is total nonsense
Music to the deaf
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