User Manual: ZPR4620
6+2 Channel Rack Zoning Mixer
V2.00 (04-2013) © Hill Audio
10
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Microphone routing
Depending on the application, user habits and local safety requirements, it can be
useful to either enable or disable the local microphones during an emergency case
where an incoming emergency signal into the emergency input (21) shuts down all
program signals. The advantage of disabling the microphones for this case is that the
local user can not interfere the legibility of the emergency announcement by using his
own microphone, the disadvantage is that if for whatever reason the emergency
announcement does not stop, the local user can still give emergency/evacuation
guidance by means of the local microphone. As a factory default, the microphones are
not muted during an incoming emergency message. To change this, a qualified installer
or technician must open the unit after disconnecting it from AC supply, and follow below
instructions.
User Manual: ZPR4620
6+2 Channel Rack Zoning Mixer
V2.00 (04-2013) © Hill Audio
7
zone output. Note that once the microphone is excluded from a specific zone,
the DAMPING control (12) of the talkover in this zone shall be set to “OFF” as
otherwise a microphone signal could not be heard but would still reduce the
program signal when the microphone is in use.
15. Record output. This is an unbalanced stereo output carrying the same signal
as the main outputs (2)/(3)/(4), but not influenced by the main volume control
(36). This is normally used for recording the output to an external tape, CD or
memory device.
16. FOH input. This is a ¼’’ TRS balanced stereo input specifically designed to
allow the connection of the output of a stage mixer, in order to use the
connected sound system for the replay of the stage mixer’s signal. This is
useful in applications where apart from stereo source replay also live music is
performed over the same sound system. The FOH input is routed to input
channel 6 and will replace the LINE6 signal once the relative front-panel
switch (35) is set to “ON”. It is in parallel to the front-panel FOH input (34).
17. Line inputs. These RCA connectors provide inputs for line-level signals to the
assigned channels. LINE2 and LINE5 can be switched to PHONO sensitivity
by means of the switches (18) and LINE6 can be switched to the FOH input by
means of the front-panel switch (35).
18. PHONO conversion switches for LINE inputs. These switches change the
sensitivity of the LINE inputs to PHONO (RIAA equalized) level.
19. Microphone input for MIC1 and MIC2. These are balanced ¼” TRS connector
without phantom power provision, hence only suitable for dynamic
microphones. Please note that for MIC1, this connector has priority to the front
panel mic connector (23), so if you intend to use the front panel mic socket
(23), please do not plug anything into this rear-panel socket.
20. Music Mute input. This is a terminal block input which allows to remotely mute
all output signals (Stereo Master, Zone A/B/C) by simply shortening the
contacts. Please note that the unit can be set to include or exclude the
microphone signals from this muting process, please section “microphone
routing”.
21. Emergency input. This is an auto-sensing, balanced terminal block input which
allows the connection to an emergency evacuation system. Once a signal is
present on this input, all output signals (Stereo Master, Zone A/B/C) will be
muted and the emergency message/signal from this input will become audible
instead. Please note that the unit can be set to include or exclude the
microphone signals from this muting process, please section “microphone
routing”.
22. Emergency volume control. This control allows to set the level with which the
signal fed into the emergency input (21) will be replayed at the two master
outputs (2)/(3)/(4) and (8)/(9).