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Table of Contents
Unpacking Your Amplifier ........................................................................... 6
Warm up/break-in period ................................................................................. 6
Placement Considerations ......................................................................... 7
Ventilation ........................................................................................................... 7
Operating Voltage, Nº333 ........................................................................... 8
Nº 333 AC mains maximum current requirements .................................... 8
Nº 333 rear-panel label............................................................................... 9
Operating Voltage, Nº332 & Nº331 ............................................................10
Nº 332 AC mains maximum current requirements .................................. 10
Nº 331 AC mains maximum current requirements .................................... 11
Nº 332/331 rear-panel label ....................................................................... 11
Special Design Features ............................................................................12
Massive Power Supply .......................................................................................12
Balanced design ...............................................................................................12
True Voltage Source...........................................................................................12
Adaptive Biasing of the Output Stage ........................................................... 13
Extensive Protection.......................................................................................... 13
Front Panel ..................................................................................................15
Rear Panel ..................................................................................................16
Remote turn-on tip polarity ...................................................................... 18
Bridged Operation .................................................................................... 22
Bridging Explained ........................................................................................... 22
Balanced Bridging ........................................................................................... 22
Balanced Bridging Kit ............................................................................... 22
Balanced Bridged Input Connection ..................................................... 23
Single-Ended Bridging ...................................................................................... 24
Single-Ended Bridging Kit ......................................................................... 25
Single-Ended Bridged Input Connection ................................................ 25
Biamplification .......................................................................................... 27
Balanced Y-adapter ................................................................................. 27
Passive biamping wiring diagram ........................................................... 28
Care & Maintenance ................................................................................ 29
U.S. and Canadian Warranty .................................................................... 30
Obtaining Service ...................................................................................... 31
Specifications ............................................................................................ 32
Dimensions: Nº 333 & Nº332 ..................................................................... 33
Dimensions: Nº 331 .................................................................................... 35