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Phil Allison
 
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"west"

Why do Dynaco Amps and even Uncle Ned's schematic of a Hi Power
Williamson
Amp use the 16ohm OPT tap instead of the 8ohm for feedback?



** The former industry standard for hi-fi loudspeakers was 16 ohms - so
most designs were optimised for this load. It only became 8 ohms ( or
lower ) with the advent of output transformer-less SS amplifiers. The 16
ohms tap also gives the highest voltage level.



What would
happen if you took a stock ST-70 or MKIII and moved the feedback over to
the
8ohm?



** You will get about 3dB more gain and 3dB more THD.




............ Phil