Power Base Series Power Amplifiers
Required AC Mains: Current, frequency and voltage requirements are provided on each unit’s back panel. All models draw 90 watts or less at idle.
Power
Power
Power
AC Connector: An appropriate AC line cord and plug are provided. 120 VAC, 60 Hz units have a standard
Controls
Power: A front panel rocker switch used to turn the amplifier on and off.
Level: A back panel rotary potentiometer for each chan- nel used to control the output level.
Stereo/Mono: A
Sensitivity: A
Input Ground Lift: A
Reset (Power
Indicators
Power: This amber indicator shows the on/off status of the low voltage power supply.
Input/Output
Input Connector: Balanced ¼ inch phone jacks. See Section 5 for XLR and barrier block accessories.
Input Impedance: Nominally 20 K ohms, balanced; 10 K ohms, unbalanced.
Output Impedance: Less than 10 milliohms in series with less than 2 microhenries.
DC Output Offset: Less than 10 millivolts.
Output Signal
Stereo: Unbalanced,
Protection
Power Base amplifiers are protected against shorted, open or mismatched loads; overloaded power supplies; excessive temperature, chain destruction phenomena, input overload and
If operating conditions are unreasonable, the patented ODEP circuitry proportionally limits the drive level to pro- tect the output transistors, particularly in the case of el- evated temperature. A thermal switch imbedded in the transformer protects the power supplies from overload. In the rare event that a transformer overheats, the ther- mal switch removes power, waits until the unit has cooled to a safe temperature and then resets itself.
Turn On: Four second delay with no dangerous tran- sients. Contact us if you need to change the delay.
Construction
Durable black finish on steel chassis with special “flow- through” ventilation from front to side panels.
Cooling: Internal heat sinks with
Dimensions: Standard
Approximate Weight: Center of gravity is 6 inches (15.2 cm) behind front mounting surface.
120 VAC, 60 Hz Units:
Power
Power
Power
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