Gryphon Mephisto Solo - Manual (Page 16)

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2. MUTE
Use this function when changing
speaker cables or interconnects
without turning the amplifier off.
3. CHECK This function allows
you to check that all indicators
are operational.
The bias selector determines the
degree of Class A operation. In
the 100% mode the Mephisto
provides 200 watts of PURE
CLASS A power into an 8 ohm
load. The bias adjustments do
not change total output power,
but only the Class A operation
range.
With very efficient speakers, 200
Watts of pure Class A might
rightly be considered overkill.
With LOW BIAS, efficient speak-
ers will be driven in Class A
most of the time.
Naturally, lowering the Class A
operation reduces powercon-
sumption and heat dissipation at
idle...
4.Low bias
Use to keep circuitry in amplifier
ready for listening without initial
warm-up. If left in inactive in L
bias for longer periods, use the
mute function, too.
5. Medium Bias Can only be
used when the Automatic Green
bias is disabled. This position
provides 50 Watts of pure class
A, more than enough for normal
listening conditions and speak-
ers with normal sensitivity. In this
setting 175 watts of Class A/B
power is available.
6. High Bias - 100% Class A
power for the ultimate perform-
ance.
Choosing bias setting
When evaluating the sonic effect
of the 3 bias adjustment modes,
it must be taken into considera-
tion that the Mephisto requires
time to settle when bias is
changed. (15 min.)
Bias may be adjusted with the
Mephisto turned on. However,
we recommende that bias
adjustment be made once and
for all during initial installation.
If the Mephisto has been turned
off using the front panel on/off
switch, it will remember the last
bias setting. After using the
master on/off switch at the rear
panel, it will return to its last set-
ting.
Green Bias
If you own a Gryphon preampli-
fier with the green bias link, The
Mephisto will automatically
change bias with reference to
the current position of the
Preamplifier´s volume control,
independent of the music signal.
If you wish the Mephisto to go to
Bias setting has no effect
on overall power that
remains unchanged,. the
bias is only changing the
portion of the power that
runs in Class A