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A Tour of Your Model 5 Amplifier
1. Program Selector The position of the Program Selector switch specifies the currently active
program source. Each position on the Input Selector switch corresponds to a pair of input connectors
on the rear panel.
2. Volume Control The Volume Control is a precision step attenuator switch that adjusts the
amplifier’s output volume level. Each step on the volume control increases or decreases the volume
level by 3 decibels. The lowest setting (extreme counter-clockwise) allows a very low-level signal to
pass to the speakers. To completely silence the speakers, use the Power switch to set the amplifier to
Standby mode.
3. Mode Indicator The Mode Indicator is a multi-color LED indicator. When the LED is green, the
amplifier is in ON mode and ready to operate. When the LED is red, the amplifier is in Standby
mode. When the LED is orange, the amplifier is ON and in its warmup cycle; the LED will change
color when the amplifier is ready to run. When the LED is dark, the amplifier is off.
4. Power Switch: OFF When the Power Switch is set to OFF, the amplifier is turned off.
5. Power Switch: STBY When the Power Switch is set to STBY, the amplifier is in Standby mode.
In Standby mode, the tubes receive filament voltage, and the filter capacitors maintain their charge,
but no program signal pass through the amplifier. Use Standby mode when you switch between
Ultralinear and Triode operation. The Mode Indicator LED lights in red when the amplifier is in
Standby mode.
Front Panel
Note: In order to prevent damage to your speakers from an unexpected loud program
source, we strongly recommend that you turn the Volume Control all the way down
before you change programs.