Ver 1.0 Feb 2014 4
Servo-Controlled Bass Amplifier Protection
The servo-bass amplifier has numerous protection circuits built in to
protect both the amplifier and the woofers. The amplifier is
designed to be current-limited to 20amps – this is more than
enough to supply over 1,200W transients to the pair of 10” woofers.
However, the servo-system in the G4 is not compression or
dynamic limited. Hence, it is possible to play the system too loud,
and damage the woofers (and also possibly your ears).
If you over-drive the amplifier, it will self-protect and you will hear
clicking or snapping sounds. This is caused by the amplifier limiting
current to the woofers (much like the over-rev fuel-cut off in car
engines). If that happens, turn down the volume of your system to
protect your hearing and your speakers.
The amplifier, although it is very efficient, also has a thermal cut-off
to protect against over-heating. Should the bass amplifiers turn off
and the back plate is very hot to the touch, turn the system off until
it cools down again. Additional ventilation might be needed at the
back of the speakers should this happen too often.
A Word about Finish
The G4 is finished to a high degree of gloss. Use only a damp cloth
to wipe the speakers down. In particular, DO NOT use paper
towels to wipe the surface of your loudspeakers. Paper fibres are
extremely abrasive and can introduce fine scratches on the surface
that will “cloud” the finish.
Treat the cabinet as you would a fine piece of furniture. If polish is
used, please avoid getting any on the drivers.
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