User manual

C7-SUB (2.0E)
C7-SUB
100Hz
GRISP
MUTE
OVL
-12 dB
-6
+6
0
Controls on C7-SUB
controller module
C7-SUB controller module switches
100Hz switch & indicator
If the 100Hz switch is selected (yellow 100Hz LED illuminated), the
upper operating frequency of the system is reduced from 140 Hz
to 100 Hz. This switch setting allows the C7-SUB to supplement TOP
cabinets in full range mode (i.e. CUT not selected).
The 100Hz mode may also be used with TOP cabinets in CUT mode
to compensate for room resonances often found in the 125 Hz
band.
Mainframe controller configuration
A P1200A mainframe in a mixed configuration, i.e. one TOP and
one SUB controller module, can deliver a higher peak power at its
SUB output than at either output in a SUB-SUB or Mono-SUB
configuration where SUB's are driven on both channels. Hence two
mixed configuration mainframes will achieve the maximum low
frequency output for a system requiring the use of two TOP and
two C7-SUB channels.
Operation with E-PAC (only possible with E-PAC
version 3 with display)
To drive C7-SUB cabinets the E-PAC has to be configured to
C7-SUB mode.
For an E-PAC version 3, the configuration is set via a front panel
digital rotary encoder in conjunction with an LCD.
The 100 Hz setting is available. The characteristics of the 100 Hz
setting are explained on the previous page under the section
"C7-SUB controller module switches".
The E-PAC can drive a single C7-SUB cabinet at an output power of
300 watts. We do not recommend that two C7-SUB cabinets are
driven in LO IMP mode as the 6 dB reduction in input level to the
loudspeakers results in no gain in acoustical output.