Tannoy SGM 10 Guia De Inicio Rapido página 8

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SGM 10/12/15
Adjustment
Each loudspeaker model features two controls labeled Treble Energy
and Treble Roll-Off, and the SGM 15 has an additional control called
Presence Energy. These allow the high frequency response to be
tailored to your listening environment.
To make adjustments, each speaker should be operated one at a time
in mono. Pan the output from your source audio so that the full signal
passes only to the left or right speaker. The Treble Energy control
increases or decreases the HF driver over its entire frequency range
from 1 kHz to 20 kHz, while the Treble Roll-Off only affects the highest
frequencies above 5 kHz. Presence Energy boosts or cuts frequencies
between 1 and 5 kHz.
All controls should be set to the 'Level' position initially. If the
sound is too bright or dull, the Treble Energy can be used for broad
adjustments. After this setting has been established, further fine
tuning with the Treble Energy (and Presence Energy for the SGM 15)
can be made as necessary. Changes to each control can be fairly subtle
and may not be heard at all if the audio being monitored has little
energy in the spectrum being adjusted. Keep in mind that speaker
positioning and room acoustics also affect a speaker's response.
Servicing
Cleaning the cabinet
To remove marks and scuffs, use a medium soft brush. If necessary,
a little warm water and detergent can be used, but under no
circumstances use a solvent or abrasive cleaner. The surface will
change colour when wet but will return to normal when dry.
Dual Concentric driver removal
Before any servicing operation, the amplifier should be disconnected
from signal input and mains power. Lay the cabinet on its back, taking
care to protect the rear plate. Remove the four hexagonal bolts and
set aside. Ease the driver from the front of the cabinet, taking care not
to mark the front surface.
Use a piece of stout cardboard to lever against if necessary. Remove
the driver and disconnect the internal wiring, taking care not to
damage the moving parts of the LF driver.
To refit the driver, connect the cables from the wiring harness to the
LF (red +ve and blue -ve) and HF (white +ve and black -ve) terminals.
Fit the driver into the mounting hole, fasten the bolts finger tight and
then progressively torque them down so that the driver seats evenly.
Drive unit servicing
The HF unit may be fitted with a new diaphragm assembly. With the
driver face down, release the three bolts securing the HF assembly
and lift the HF unit vertically upwards and away from magnetic
attraction caused by the LF magnet. Replace the diaphragm - it is
self-centering - taking care to align the parts correctly.
To refit the HF unit, hold it about 30 cm vertically above the LF
magnet in both hands while resting on your elbows. Slide your elbows
apart and lower the HF unit onto the back of the LF magnet. As the
HF unit gets close to the magnet you will feel the magnetic fields
repelling. Align the fixing holes and secure with the bolts, tightening
down evenly. Do not tighten the bolts finally until you are sure the HF
unit is seated correctly and the two magnet systems appear parallel.
The LF unit may be re-coned in the normal way. Use only the parts
and adhesive supplied in the re-cone kit.
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Quick Start Guide