9. CABINET IMPEDANCE – When one or both of the two parallel jacks are connected, simply set the
impedance selector switch for connection according to the chart below:
16Ω + None = 16Ω,
16Ω + 16Ω = 8Ω,
8Ω + None = 8Ω
8Ω + 8Ω = 4Ω
4Ω + None = 4Ω
A SPEAKER MUST ALWAYS BE PLUGGED INTO ONE OF THESE JACKS WHEN THE AMPLI-
FIER IS ON OR DAMAGE MAY OCCUR. SWITCH THE AMPLIFIER OFF OR TO STANDBY WHEN
CHANGING SPEAKER CONNECTIONS OR IMPEDANCE SETTINGS.
10. GROUND LIFT – This switch separates the internal circuit ground from chassis and power ground
in order to eliminate possible ground loops between the Power Station and the load amplifier
connected to the AMP IN jack. Select the position which yields quietest operation. With a properly
wired AC outlet and factory supplied AC cord, this switch may not produce a noticeable difference.
11. MAINS FUSE – Protects the amplifier from electrical faults. Replace only with type and rating spe-
cified on the rear panel of your amplifier.
12. AC MAINS INPUT – Connect to a grounded outlet in accordance with the voltage and frequency
specified on the rear panel of your amplifier.
USE ONLY THE FACTORY SUPPLIED CORDSET OR A UL APPROVED EQUIVALENT TYPE
TUBE FUNCTION AND LOCATION
Power and phase inverter tubes are mounted horizontally near the back of the unit. The power tubes are
factory biased for optimum performance. No provision for internal or external biasing is provided. To insu-
re that the Power Station will remain within safe temperature operating limits, the bias must not be mo-
dified or tampered with. Doing so will immediately void the warranty. Tube types are factory selected for
superior performance, consistent tone quality and reliability. Power tubes are factory tested and matched.
For best performance, replace only with factory recommended tubes.
TO REDUCE THE RISK OF ELECTRIC SHOCK, PLEASE REFER SERVICING TO QUALIFIED
SERVICE PERSONNNEL. NO USER SERVICABLE PARTS INSIDE.
V1 – 12AX7 Power amplifier driver and phase inverter.
V2, V3 – 6L6 Power tubes.
USE ONLY 6L6 OR EQUIVALENT. NOT INTERCHANGEABLE WITH ANY OTHER TUBE TYPES!
Any type or brand of 6L6 can be used in this amplifier without adjustment or modification.
It is important to keep the amplifier on standby during breaks, and powered down when not in use to keep
things cool and to extend tube life.
Even though you may follow this advice carefully, you will still observe that the amplifier tends to run hot
during use.
This is normal
and there is not only a cooling fan and plenty of ventilation in the chassis
design, but all of the critical components and transformers are designed to withstand much more heat
than you will normally experience at during typical operation.