Join Date: Mar 2010
Location: Chapel Hill, NC
Originally Posted by RNMarsh
I dont see any significant difference between bipolar and fet for audio. Neither for Noise nor harmonic-wise.
Both can give ultra low noise and both can have only 2H and 3H dominant in any modern topology. Maybe for phono cart and direct coupled there is some advantage to use fets. Like high Zin and low current thru cart. But thats all I can think of.
All else being equal, an FET input preamplifier is less susceptible to RFI. Of course proper RF low-pass filters at inputs and outputs fix this for bipolars as well...
Howard Hoyt, CE - WXYC-FM 89.3
UNC Chapel Hill, NC - www.wxyc.org