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Old 17th February 2014, 10:37 AM   #1
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Default Threshold 400A - spacer?

Hi all,

I have two Threshold 400A for refurbishing. They both have washers sitting on the mounting screws between front plate an heatsink. I have never seen these on other models.

I think these spacers are contra productive for the heat dissipation because there is a gap between heatsink and front plate and these are not originally fitted.

Does anybody have experience?



Cheers,
Gerhard
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Old 17th February 2014, 07:07 PM   #2
delecoy is offline delecoy  United States
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From what I've read good air flow does a class a amp many favors. If the spacers were intended to help it breathe it seems doubtful they would hurt anything.
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Old 17th February 2014, 07:14 PM   #3
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Yes and No...

For Bias adjustment it is a must to have the upper lid closed.
Bias regulation is influenced by the temperature measured on the heatsink's backside.
So why should there be an air stream from bottom to cover lid behind the face plate and not through the heat sink?

Wondering if the washers are the developpers intention...

(besides, there was a lot of dust and other things inside....)

??

Any ideas?

Last edited by SL10User; 17th February 2014 at 07:17 PM.
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