Issue 1 : January 2005
kW Phono Pre-Amplifier
Instructions for use
Page 6 of
7
OPERATION
BEFORE SWITCHING ON
. . . . .
Plug the accessory IEC mains lead into the
rear panel socket, then the other end into a
convenient wall outlet.
STARTING
Press the POWER switch button on the
preamplifier front panel - the blue LED just
above the button will light indicating that
power is applied to the unit.
LEDs in the support feet will also light red for
about six seconds, indicating that both left
and right audio outputs are muted.
Muting is then disabled, and feet illumination
then fades over approximately fifteen seconds
to yellow, showing that your kW Phono is
now ready for use.
After a period of about 35 minutes, the LED
feet colour fades to blue, confirming that the
pre-amplifier is fully warmed up.
PHONO MM / MC SWITCHING
Your kW Phono preamplifier has independent
circuits for moving magnet (MM) or moving
coil (MC) phono pickups.
To obtain the preferred input, press the MM /
MC selector button on the front panel. A
corresponding blue indicator on the front
panel will light to confirm your selection.
Each press of the button changes over input
between the two options.
CAUTION
- only operate this function at low
volume setting.
RIAA / IEC COMPENSATION
As a further refinement, the phono pickup
characteristic can be adjusted to suit either
RIAA or IEC compensation curves.
Historically, the original RIAA curve defined
the low audio frequency limit as 20Hz.
The later IEC standard specifies frequency
response down to 10Hz to restrict possible
turntable rumble, or the effect of a warped
record.
Each time the RIAA
/
IEC button on the front
panel is pressed, the phono pickup stage is
switched alternately between the two options.
A corresponding blue indicator on the front
panel lights up to confirm your choice.
