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Mosfet mist?

Greetings,

I have read several articles on the sonics of mosfet amps to include Adcom,B&K,Counterpoint,Perreaux,etc. What exactly is mosfet mist and how would one know what to listen for. Are some amps more prone to this mist than others? I have a Perreaux 1150B doing woofer duty on a pair of Focal 706s spkrs(A modified Parasound 1000A on top)How would say the 1150B compare with a B&K in relation. Thanks.
south43
mustagefan's avatar
mustagefan
4 posts
 
Atmasphere is the capacitance of the MOSFET that you describe is it of the non linear kind i.e. does it bounce around at different frequency and amplitudes?
atmasphere's avatar
atmasphere
11,841 posts
 
Mustagefan, yes. This was more of a problem during the lateral MOSFET period. These days you see more of the vertical MOSFETs. I think what has happened is that in the old days designers did not always take the input capacitance of the devices into account. Experience is always helpful though so the issue is less common with modern designs.
jwm
918 posts
 
Atmasphere if you were to make a tube hybrid amp would you pick Mosfets or Bipolars for the output stage.
atmasphere's avatar
atmasphere
11,841 posts
 
I've been studying that very question for the last year or so. There are advantages to each, but in my case I think I would go with the MOSFETs for the additional linearity- I like to run things zero feedback.
jwm
918 posts
 
I think you are right and a hybrid tube amp would be a good idea for home theater. It would have no output transformers which you like. So lets get cracking.
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