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Old 21st June 2011, 04:52 AM   #31
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Originally Posted by P. Lambda View Post
Buying a Forte 1 or 3 with cold heatsinks
is a common problem. Mine had that too.
In most cases, you just need to increase the bias
by turning the pot on each circuit board.

You have to be very careful because they are VERY sensitive.
As I mentioned, I blew out a couple of rail fuses before I got it right. Increase the bias until the heatsinks can only be touched a few seconds. There is a post on this forum, on how to use a voltmeter to get the
right bias on this amp.

Also, make sure that the thermistors are in contact with the heatsink.
Mine had one loose which negatively affected the sound.
Do you know what the bias value is for Forte 3? Tried googling it, can't find it. Thanks.
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Old 21st June 2011, 05:41 AM   #32
Zen Mod is offline Zen Mod  Serbia
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turn it up until heatsinks are in 45C region
my Papa is smarter than your Nelson !
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Old 21st June 2011, 07:21 AM   #33
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I remember apx. 40 mV across the emitter resistor.
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Old 22nd June 2011, 12:56 AM   #34
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Thanks sl10user and zen mod.
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Old 22nd June 2011, 01:38 AM   #35
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Just do search on this forum using the words Forte heatsink
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Old 30th June 2011, 06:21 AM   #36
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Thanks again P. Lambda. Changed the trim pots and adjusted the bias. Sound alot better but there's something missing. Find it's not as detailed and warm as my Threshold Stasis 2. Any ideas or suggestions maybe cap upgrades on the board? Thanks.

Last edited by wannabeaudiophile; 30th June 2011 at 06:25 AM.
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