"ScottW" wrote in message
ups.com


Origional document reference:

http://www.qscaudio.com/products/amps/plx/plx.htm

6K ohm input impedance isn't ideal and may cause problems
with many a source.

Other than older vacuum tubed preamps, its hard to think of
any. Most modern (less than 20 year old) vacuum tube and SS
preamps will handle 2 volts into a 6 K ohm just fine. Most
will put out upwards of 10 volts into a 10K load, for
example.


But most disconcerting is the very strange input
sensitivity spec. 1.9V @ 8 ohms?


Are they implying that input sensitivity
varies with output load impedance? That will cause FR
variance with any speaker having a non-flat impedance
curve (virtually all but active speakers).


What they are saying that this is the input sensivitity for
rated output with a 4 ohm load.

The rated output power varies with load impedance, and the
rest follows.


So that begs the question already raised... why isn't FR
specified?

It is, in a part of the original document that Mike didn't
post.