User manual

1-2 E-PAC (V02) User Manual
Output
2+/2-
1+/1-
µController
ConfigLevel LED Display
DSPADC
Power
Amplifier
Error
Detection
Input
Amplifier
Input
Link
Mix In
DAC
Remote
E-PAC power amplifier controller block diagram
1.2. E-PAC based systems
E-PAC, the E-Series Power Amplifier Controller, is a single channel
amplifier with an internal controller for operating E-Series systems.
Unlike the modular design of the controller modules for P1200A
and A1 mainframes, the internal controller is based on Digital
Signal Processing, DSP. The E-PAC is pre-programmed for E-Series
and C6 loudspeakers and their different operational modes, the
configurations are selected by setting DIP-switches on the rear
panel. The E-PAC has an additional linear configuration for MAX
loudspeakers.
The E-PAC is specifically designed for high impedance loads (200
W into 16 ohms, 300 W into 8 ohms), and therefore provides the
same output power for a single 16 ohm E3 loudspeaker as one
channel of a P1200A mainframe. The nominal 8 ohm impedance’s
of other E-Series loudspeakers result in a single cabinet having a
maximum SPL of 2 dB less than when driven by a P1200A.
Up to four E3 loudspeakers or two 8 ohms loudspeakers can be
driven with a reduced output level (–6 dB). This is useful for
situations where multiple loudspeakers are needed but maximum
output is not required.
All the functions of the E-PAC, including programmable internal
delay settings, can be remotely interrogated and altered via the
RIB, Remote Interface Bridge and a PC.
1.3. Block diagram