IntroductionSpecificationsOperationPreparing speaker for useVolume control adjustmentControlsSpeaker cableMultiple speaker installationService

Electronic servicing: amplifierPreamp/crossover network assemblyAux & treble amplifier assembliesBass amplifier assemblyPower supplyMotor & brake control circuitsPower Supply assembly

Mechanical servicingMotor lubrication and cleaningTwo speed motor assembly diagramMotor adjustment/drive beltsSpeaker replacementBass rotor replacementBass rotor, lower bearing replacementTreble hornMechanical parts list

Schematic: 234/250V power supplyPlugs & socketsSchematic: power supply & motor controlSchematic: amplifiers & crossoverExploded view AExploded view B