22
3.5 Why an extensive bracing of the cabinet ?
3.6 How works the digital volume and tone adjustement ?
3.7 Why several loudspeaker drivers ?
The loudspeaker cabinet is very tall. Moreover, there are several vents for the
speaker drivers on the front panel. As a result, transmission of vibrations from
the drivers to the cabinet can hardly be prevented. However, to avoid such
vibrations, stiffening ribs are optimally placed within the cabinet. By implementing
this, admittedly, slightly extreme measure, we have succeeded in eliminating
all vibrations.
Digital servo components are used to set volume, tone, and balance. They are
nearly ever-lasting as they do not contain any mechanical parts. Furthermore,
they are maintenance-free and very precise. Moreover, the intelligent software
monitors and limits the volume level when the system is switched on in order
to avoid an unpleasant surprise. You conveniently operate the system by using
an IR remote control.
Due to the slim appearance and the pleasing design, it is not possible to use a large
woofer with an accordingly large surface of the diaphragm. However, to achieve
similar low-frequency foundation, the surface of the diaphragm is divided among
several separate drivers. A big advantage of these relatively small woofers is that
the smaller diaphragms have an increased dimensional stability. Additionally, special
magnets reduce harmonic distortions, i.e. the non-linear distortion factor.
As the woofers cause air vibrations, a small enclosure is built into the loudspeaker
cabinet in order to protect the mid-range driver from their infl uence. A specially
built driver with extremely low harmonic distortion is used for the mid-range. The
treble dome is equipped with a broadly radiating aluminum diaphragm. We have
paid special attention to the weight of the coil and the diaphragm and reduced
their weight as much as possible.
At Revox, the quality of the loudspeakers is permanently monitored. Each Digital-
Active Loudspeakersystem undergoes a 14 hours burn-in test before shipment. To
ensure that the electrical requirements are fulfi lled, our manufacturing department
works with sophisticated computer measuring equipment. And even when in
operation, the loudspeaker is constantly monitored. The electronic unit permanently
measures the temperature of the heat sink. If, for some reason, the heat sink
overheats, the electronic unit shuts down automatically, and a LED lights up.
Moreover, the power fed to the loudspeakers is constantly monitored. If the load
is too heavy for a driver, it is reduced.
3.8 Monitoring of electrical and thermal parameters
Digitale LS.indd
25.06.2001, 21:19
22
