-Do not set these units near the water near following area: bathtub, washbowl, kitchen sink,
laundry tub, wet basement, or swimming pool.
-Obstruct the necessary all- around ventilation: especially DO NOT place the set close to
curtains or on soft furnishing such as carpets. Overheating can cause unnecessary damage
and shorten the lifespan of the equipment.
-No user serviceable parts inside. Refer servicing to qualified technician. Never remove the
cover unless qualified to do so. This unit contains dangerous voltage.
-Read the user manual and familiarize yourself with the functions before you attempt to use
this equipment.
C.
Important warning!
You must earth this machine. The PREference PSU is going through 3 wires power cord and
wall ac socket.
If you cut off the mould plug, get rid of it straight away. You cannot rewire the plug it into a
socket
The wires in the mains lead have the following color code:
Green and Yellow: Earth
Blue: Neutral
Brown: Live
If the wires in the main lead do not match the colors marked in your plug, do the following:
You must connect the green and yellow wire to the pin marked by the letter “ E” or by
the safety ‘Earth symbol’ or colored green and yellow or green.
You must connect the blue wire to the pin which is marked with the letter “N” or colored
black.
You must connect the brown wire to the pin which is marked with the letter “ L “ or
colored red.
You must have a fuse in the plug, adaptor, or at the distribution board.
The power supply cord should be rounted so that it is not likely to be walked on or
pinched, especially near the plug, convenience receptacles, or where the cord exists
from the unit.
The power-supply cord of the unit should be unplugged from the wall outlet when it is
to be unused for a long period of time.
Introduction
A.
Introduction
PREference, the second-generation pre-amplifier from KingRex, is a logical extension
of the success store award-winning Preamp. Centered around high-quality op-amp
and the diamond buffer highly praised for its musicality, a current booster has been
added to the final output of the amplifier stage to enhance drivability. DC servo
circuit has also been implemented to avoid unwanted audio signal loss due to
coupling capacitors. Volume control is ALPS. Gain is user selectable with a choice
