Hill Audio ZPR-2820, User Manual, Page: 16 / 21

13. 100Hz Highpass (HP) filter for Zone output . In pressed position, this switch removes
frequencies below 100Hz from the Zone output, helping to adapt to zone speaker systems
with limited low-frequency response (like ceiling speakers)
14. Mono switch for Zone output . In pressed position, the left and right outputs of the Zone
signal are summed to deliver a mono signal. Useful for installations where the zone speaker
system does not allow stereo reproduction.
15. Music Mute input . This is a terminal block input which allows to remotely mute all output
signals (Stereo Master, Zone) by simply shortening the contacts
16. 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 (Main, Zone) will be muted and the emergency message / signal from this
input will become audible instead. Please note that the internal microphones (23) / (25) are
included in this muting process and cannot be used while an emergency message is
broadcasted.
17. Emergency volume control . This control allows to set the level with the signal fed into the
emergency input (16) will be replayed at the two master outputs (3) / (4) / (5) and (8) / (9) /
(10).
18. 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 can
be routed to input channel 4 instead if the Line 5 signal by pressing the FOH enable switch
(19)
19. FOH enable switch . In pressed position, this switch routes the FOH signal (18) to Channel 4
instead of Line 5 RCA input.
20. Line inputs . These RCA connectors provide inputs for line-level signals to the assigned
channels.
21. Phono inputs . These RCA connectors provide inputs for phono-level signals with RIAA
equalization to the assigned channels. The sensitivity can be switched to line level by means
of the switches (22).
22. Sensitivity switch for Phono inputs . Sets the sensitivity of the Phono inputs (21) to Phono
with RIAA equalization (pressed) or Line level (released).
23. Microphone input for MIC1 and MIC2 . These are balanced ¼” TRS connectors, which can
be internally st to either carry phantom power or not, thus these inputs can be used both with
condenser and dynamic microphones. Please see section “microphone phantom power
setting”. The signal of these inputs is connected in parallel with the front-panel inputs (25).
24. Talkover Threshold Control . Sets the level of the microphone signal at which the music
signal is automatically attenuated. Note that the amount of attenuation is determined by the
damping control (36)
25. Microphone input for MIC1 and MIC2 . These are balanced Combo XLR+1/4” TRS
connectors, which can be internally set to either carry phantom power or not, thus these
inputs can be used both with condenser and dynamic microphones. Please see section
“microphone phantom power setting.”
26. Level control for microphone inputs . Allow the individual adjustments of the levels for
MIC1 and MIC2.
27. Microphone ON/OFF switches for MIC1 and MIC2 .
28. Microphone Equalizer . Allows the adjustment of the tonal balance for both microphone
simultaneously inputs in three voice-specific frequency bands with an adjustment range of +-
12dB.