-10-
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Designed by John Curl
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THX certified by Lucasfilm Ltd.
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Massive Encapsulated 1.7 kVA Power Transformer with Separate Windings for Each Channel
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120,000 uF Computer-grade Capacitors in the Power Supply
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Multiple Polystyrene Film Bypass Capacitors to Smooth the Power Supply
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Independent Power Supplies for Each Channel
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Separate Regulated Power Supplies for Driver Stage
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Cascode Class A Input Stages with Matched Complementary J-FET Pairs
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Hand Picked Complementary MOSFETS in High Voltage Driver Stages
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12 Complementary Pairs of Beta-Matched 50 MHz, 15 Ampere Output Transistors
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Output Transistors Direct-Coupled to Speakers Without LRC Networks
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Linear Tracking, Instantaneous Acting DC Servos
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High-Bias Class A/AB Operation
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Gold-Plated Metal Structure RCA Input Jacks
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Multiple Temperature Sensors and Silver-Cadmium Relay Protection
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FR-4 Glass Epoxy Circuit Boards, Double-Sided for Precision
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Custom Designed Audiophile-Grade AC Power Cord
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Configurable for Multi-Channel Home Theater, Multi-Zone Stereo, Biamp or Triamp Operation
Rewiring Your HCA-1206 for 220 V - 240 V 50 Hz Operation
The amplifier may be rewired for operation abroad. This involves changing several wires on the power
transformer. Please refer this conversion to a skilled electronics technician to avoid personal injury or
possible harm to the amplifier. There are hazardous high voltages present inside the chassis even after
the power is turned off and the AC cord has been disconnected.
As it is supplied for 110 V-120 V operation, the red and white transformer primary wires are connected
together. The yellow and black primary wires are also connected together. The 120 V AC source is
then connected to the black/yellow and red/white wires.
To convert to 220 V-240 V operation, disconnect the white wire from the red wire and disconnect the
black wire from the yellow wire. Next, connect the yellow and white wires are together. The 220 V AC
source is then connected to the black and red wires.
When you change the voltage from 120 V to 220 V, be sure to change the main fuse from 8 amps to 4
Amps
It is quite normal for the power transformer to run a little hotter during 50 Hz operation. This is well
within its safety limits and is no cause for concern.
White
Yellow
110/120 V Operation
Red
Black
Red
Black
Yellow
White
220/240 V Operation
