Tannoy System 1000, User Manual

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Crossover.
The crossover is mounted on the internal vertical brace, behind the terminal panel.
To inspect it, first remove the panel by releasing the hexagonal screws. Take care to
avoid undue stress on the cables and components.
To remove the crossover completely the cables must be disconnected from the drive
unit. Please proceed as above to remove the drive unit.
Checking the unit.
The speaker can be checked using a sine wave generator. A high quality, low
distortion (preferably a beat frequency) oscillator will be required to check for any
buzz and rattle noise generated by the drive unit. The voltage to be applied at the
speaker terminals should be about 3V rms (the speakers should be free from buzz
and rattle at any audio frequency).
Checking the speaker at higher levels is permissible, provided that the lower
frequency of the sweep is limited according to the voltage level ; for instance with
levels exceeding 10V rms the frequency should be kept above 100 Hz.
List of spare parts.
PART NUMBER