2. amps-preamps
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Whats the difference between MOSFET & Class A, AB

I was wondering what the general difference was in MOSFET amps as compared to Class A or Class AB amps.

For the last few years I have been running a Classe CA 300 amp. A couple weeks ago I had a fuse blow on the Classe and it also burnt out a resistor. Knowing the Classe was going to be in the shop I bought a old CJ Motif MS-100 amp.

Now after a day or two of listening I'm thinking this old Motif betters atleast too my ears the Classe so it got me wondering.

Cheers Gary
deanna4242
sidssp
1,077 posts
 
Class A and Class AB refer to the type of circuit topology or design of an amp.

MOSFET refers to a particular type of transistor. When we talk about MOSFET amp, we usually refers to the output transistors although MOSFET can be used in other parts of an amp circuit as well. The design of the amp can either be Class A or Class AB or other types.
jaybo
4,478 posts
 
mosfets rule!
6550c
393 posts
 
^^^^^ Until tubes came along. lololo
rleff
1,065 posts
 
Jaybo pretty bold statement;ever listen to tubes????
mechans
3,048 posts
 
A MOSFET is an acronym for an amplification device not the type of circuit. BTW it is metal–oxide–semiconductor field-effect transistor. There are other FETs but I too like the old thermionic tubes.
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