Camco 32 dB - Manual (Page 17)

3 INST
ALLA
TION / 4 OPERA
TION
USER MANUAL
VORTEX 6, 4, 2.6 and 200V P.16
WARNING !
SPEAKON connectors marked with the lightning fl ashes indicate high vol-
tages that are potentially life threatening.
Wiring to these terminals requires installation by an instructed person or
the use of ready-made leads or cords.
Custom wiring should only be carried out by qualifi ed personnel.
To prevent electric shock, do not operate the amplifi er with any of the
conductor portion of the speaker wire exposed.
NOTE:
For reasons of safety and performance, use only high-quality fully in su-
lated speaker cables of stranded copper wire. Use the largest wire size that
is economically and physically practical, and make sure the cables are no
longer than necessary.
IMPORTANT:
When connecting speaker cabinets in parallel, always use all the contacts
in both SPEAKON connectors. If not, this may cause permanent damage to
the connectors and considerably reduce performance.
4.1 Controls
4.1.1 Volume Control
A microprocessor-controlled DCA (Digital Controlled Attenuator) with a control
resolution of 12 bits per channel is integrated into the signal path. This means
that the signal is not subject to an A/D followed by a D/A conversion with
associated losses.
Using a DCA instead of the “conventional” VCA signifi cantly reduces distortion
and, at the same time, it improves the noise characteristics. A volume control
with 41 notched settings controls the DCA via a microchip.
These settings have been selected to correspond to human hearing
characteristics (logarithmically) and therefore guarantee an optimal range of
settings for practical applications. Each channel can be set individually except
when operating in mono modes whereby only channel A is active.
Set the volume to zero before turning on the amplifi er to prevent the occurrence
of sudden high volume levels which may cause damage to your hearing and/or
the speakers.
The volume controls are also used to set the CAI address. (See 5.2.2 CAI Address
Settings)