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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
sumikito
13 posts
 
Very well said Atmasphere,that is exactly what happens and I have heard it on speakers with a lot of capacitance in their crossover networks like 18/24db designs and large caps in thier woofers,shunts for instance.Mosfet amps tend to sound quite nice with 6db network speakers.Now back to my collected Mosfet Mist.Anybody out there want any free samples?
phd
1,283 posts
 
Would you rather be bipolar or have a mosfet mist? The choices are unsettling.
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
11,662 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.
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