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IMPORTANT!
ISP
GR
[4]
[5][6][7]
E-PAC Indicators in detail
E-PAC, Hardware manual
When the E-PAC is set to STANDBY (or the mains power is turned
off) the movement of the loudspeaker cones in the cabinets
connected is no longer damped by the power amplifier output. This
removal of the damping makes them susceptible to excitation by
other loudspeakers in the surroundings. Audible resonances may
occur, and even absorption of low frequency sound energy as the
undamped loudspeakers act like a 'bass trap'. To permanently
mute single subwoofer cabinets it is therefore preferable to use the
MUTE function instead of STANDBY. The STANDBY mode,
however, can be of advantage with mid-high systems, because it
will remove any residual noise from the system.
The MUTE/POWER switch is a 'soft' switch which doesn't
electrically isolate the E-PAC from the mains supply. The E-PAC
circuitry can be electrically isolated from the mains supply by
switching the rear panel mains power switch to its off position.
The setting of the MUTE/POWER switch is stored in the E-PAC
when the mains power is turned off or disconnected. After
reconnecting the E-PAC it will revert to the same status as before
disconnection.
3.1.3. LEVEL/PUSH MENU (Digital rotary encoder) [3]
Operation, configuration and status viewing of the E-PAC are all
accessed via the front panel digital rotary encoder; LEVEL/PUSH
MENU. In the main menu the encoder acts as a level control.
Pushing or turning the encoder gives access to different menu
levels or enables configurations or values to be entered.
− Brief press: access to the menu level.
A detailed description of the menu structure and access is given in
the E-PAC Software manual, which is also provided with the E-PAC.
3.2. Indicators
3.2.1. LC Display [4]
Serves as a user interface and display for all configuration settings
and status information.
The display is illuminated and can be set to "on/off/timeout 10s."
A detailed description of the menu structure and access is given in
the E-PAC Software manual, which is also provided with the E-PAC.
OVL
3.2.2. ISP LED - Input Signal Present (green) [5]
− Illuminates when the E-PAC input signal exceeds –30 dBu.
3.2.3. GR LED - Gain Reduction (yellow) [6]
− Illuminates depending on the input signal: the
(1.0E)
The ISP indication is unaffected by the setting of the level
control and the MUTE function but will not operate in STANDBY
mode.
E-PAC limiter circuit reduces gain by more than 3 dB. This state
is not critical but shows that the system has reached its limits.
Page 13 of 24
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