NAIM POWERAMPS Manual - Nap 135 Mono Power Amplifier
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nap 135 mono power amplifier
connections
The negative input and output connections are all common. The mains earth (ground) should always
be connected regardless of what other equipment is used in conjunction with Naim power amplifiers.
This only grounds the case and the electrostatic screen within the transformer, and is not connected
to the signal negative. In order to avoid hum loops, the signal negative of the whole system should be
connected to the mains earth (ground) in ONE place. This will normally be in the turntable or cd player.
protection
In the nap135 power amplifier, fan speed is increased in response to an increase in amplifier
dissipation. If the heatsink of the 135 reaches 70°C due to either prolonged running at very high
dissipation, blocked airflow, or fan failure, the mains supply will be interrupted and the indicator light
will go off until the amplifier has cooled down. This may take up to thirty minutes. The regulated
power supply will shut down if more than 18amps is drawn for more than ten microseconds, but the
indicator light will not go off. To reset, turn the amplifier off for two minutes.
loudspeaker cable
For the best results Naim Audio’s own speaker cable should be used to connect a loudspeaker to the
output of the power amplifiers. Special Naim Audio loudspeaker connectors are supplied to make the
connection to the power amplifier(s). IT IS ESSENTIAL THAT THESE ARE USED, IN ORDER TO
COMPLY WITH CURRENT SAFETY REGULATIONS.
DO NOT, FOR ANY REASON, USE SO CALLED HIGH DEFINITION WIRE OR ANY OTHER SPECIAL
CABLE BETWEEN POWER AMPLIFIER AND LOUDSPEAKER AS DAMAGE MAY RESULT.
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