UNPACKING
Your amplifier should reach you in a substantial protective carton. On unpacking, please
examine the unit for signs of prior use or damage. Check that all the front panel controls
function mechanically. The following items should also be in the carton:-
(a) AC power lead with pre-molded IEC straight connector and plug.
(b) Owners' registration card, which should be completed, and the bottom section removed
and returned to us.
INSTALLATION - IMPORTANT
There are three points that must be considered carefully when installing your amplifier.
1) Adequate ventilation.
2) Proximity to low level gain stages.
3) Proximity to heat source and direct sunlight
Because the Masterclass is a pure class A design, a large amount of heat will be generated
from the amplifier heatsink. It is VERY IMPORTANT that the amplifier must not be confined
in a space that will produce a build up or re-circulation of heated air. We recommend a
clearance of approx. 10cm (four inches) either side and above the unit. This will allow a free
circulation of air when situated in an open back cabinet.
CONNECTING TO A MAINS SUPPLY
Before connecting your amplifier to a mains supply ensure that the mains voltage rating on
the inspection ticket and packing carton is the same as your countries supply. Connection to
the mains is via the A.C. cable supplied with your amplifier and connects to the mains input
socket at the back of the amplifier.
SIGNAL CONNECTIONS
Always ensure that your amplifier is switched off before any connections are made to
associated equipment.
Loudspeakers
The loudspeaker connections are made via the four gold plated WBT binding posts at the rear
of the amplifier these are marked R(right) and L(left) for identical connection to your
loudspeakers. Both left and right speakers have a positive (+) and negative (-) connection
which are also for identical connection to your loudspeakers. We recommend that
loudspeakers of 4-16 Ohms impedance should be used with your amplifier.
Input Signals
There are three line level inputs, tape input, phono input and a balanced input.
Phono Input
This caters for moving magnet cartridges.
Balanced Input
The XLR sockets are for connection to a source with a balanced output such as the
Masterclass CD player. The pin configuration is the professional standard:
Ground
Pin One
Positive (hot)
Pin Two
Negative (cold)
Pin Three
Outputs (low level)
There are two pairs of signal outputs, one is fixed, and the other is variable working from
amplifiers main volume control.
The fixed output can be connected to a tape recorder and is labeled Tape Output. The output
should be high enough to work with most analogue tape inputs and the analogue interface of
most digital recorders.
The variable output is called Pre-out and is designed for operating another power amplifier. It
can also be used to feed an active subwoofer or surround sound processor in a home theatre
system.
