OPERATING INSTRUCTIONS
INSTALLATION
Your amplifier should be positioned to ensure a free flow of air over the rear heat sink and through the upper and
lower grilles. When driven continuously at well above average listening levels, the temperature on the heat sink may
exceed 50oC. This is not a fault, but an indication of the need for adequate ventilation.
Please ensure that the IEC mains lead is correctly terminated.
UK/EUROPE Brown = LIVE = Black USA/CANADA!
Blue = NEUTRAL = White!
Yellow/Green = EARTH = Green
THE SPM 1050 MKII MUST BE EARTHED AT ALL TIMES VIA ITS OWN MAINS LEAD.
FAILURE TO DO THIS MAY BE HAZARDOUS.
CE This unit complies with EN 50081-1 & IEC 801/2
REAR PANEL
The two female XLRs are pre-amplifier inputs. Also, phono
input sockets are available immediately outboard of the IEC
mains plug. Please connect these last, with the amplifier
switched off.
OPERATION
When the amplifier is connected to the mains the LED immediately above the power switch will indicate red
(standby). When switched on, this LED will change to illuminate green (operational). There will be a delay of about
12 seconds before the output signal is fed to the loudspeakers, with the subsequent illumination of the blue Status
LED. This is to allow the amplifier to stabilise.
In the event of a major overload or a short circuit across the output of any channel, the green "power on" LED will
indicate trip by fading and immediately re-illuminating to red standby mode. The amplifier will shut down
automatically and it should then be switched off. When the fault condition has been rectified, the amplifier can be
It has come to light that, in some European
countries a hum may occur if Pre and Power
Amplifiers are connected to mains wall sockets
which do not have an earth. Please ensure
that, if this is the case, the pre and power amps
are connected via a multi-way mains block
which contains an earth point at each socket
outlet. This is to ensure that the chassis
metalwork of each item is connected together
and Chord Electronics Limited firmly
recommends that an earthing method for the
building is implemented.
