User Manual: ZPR4620
6+2 Channel Rack Zoning Mixer
V2.00 (04-2013) © Hill Audio
6
4. Stereo Master output. This is a balanced terminal block output carrying the
same signal as output (2)
5. Equalizer for Stereo Master output. This is a 3-band stereo equalizer to adjust
the frequency response of the Stereo Master output. Adjustments shall be
made with a small screw driver. Note that the total angle is 300 degrees and
do not apply excessive force with the screw driver.
6. Maximum level setting for Stereo Master output. This control allows to limit the
maximum level at the outputs (2)/(3)/(4) in order to match the connected
sound system. Adjustments made on this control will not be displayed by the
output level meter (37). Adjustments shall be made with a small screw driver.
Note that the total angle is 300 degrees and do not apply excessive force with
the screw driver.
7. Talkover adjustment for Stereo Master output. These two controls allow to set
the level at which the talkover is enabled (SENSITIVITY) and the amount of
damping which is applied once the talkover is active (DAMPING). If no
talkover effect is required for the stereo master output, the DAMPING control
can be set to “off”. Adjustments shall be made with a small screw driver. Note
that the total angle is 300 degrees and do not apply excessive force with the
screw driver.
8. Zone A/B/C mono outputs. These are balanced mono XLR outputs carrying
the zone output signals controlled by (38) respectively.
9. Zone A/B/C mono outputs. These are balanced terminal block outputs carrying
the same signal as outputs (8)
10. Equalizers for Zone A/B/C outputs. These are 2-band stereo equalizers to
adjust the frequency response of the Mono zone outputs. Adjustments shall be
made with a small screw driver. Note that the total angle is 300 degrees and
do not apply excessive force with the screw driver.
11. Maximum level setting for Zone A/B/C outputs. These controls allows to limit
the maximum level at the outputs (8)/(9) in order to match the connected
sound system. Adjustments made on this control will not be displayed by the
output level meter (40). Adjustments shall be made with a small screw driver.
Note that the total angle is 300 degrees and do not apply excessive force with
the screw driver.
12. Talkover adjustment for Mono zone outputs. These controls allow to set the
amount of damping which is applied once the talkover is active (DAMPING). If
no talkover effect is required for any of these mono zone outputs, the
DAMPING control can be set to “off” for the respective zone. Adjustments
shall be made with a small screw driver. Note that the total angle is 300
degrees and do not apply excessive force with the screw driver.
13. 100Hz High-Pass filter for Mono zone outputs. This helps to reduce the low-
frequency energy on outputs (8)/(9) which is specifically useful if a zone is
used to feed a background music system which may consist of relatively small
wall or ceiling speakers.
14. Microphone include/exclude switch for Mono zone outputs. Pressing this
switch will include the microphone signal into the respective zone output,
releasing the switch will exclude the microphone signal from the respective
User Manual: ZPR4620
6+2 Channel Rack Zoning Mixer
V2.00 (04-2013) © Hill Audio
11
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Connections
For connecting this unit to AC mains, please note:
Check whether the AC mains voltage and frequency is the same as this
product is specified for (see rear panel of product). Whenever the specified
voltage or your AC plug should not match the local conditions, do NOT plug
the AC cord into the wall outlet and contact you dealer immediately.
Do not operate this unit without the line cord earth ground connected. To do
so may increase the risk of electric shock and increase line cord conducted
emissions.
For making audio signal connections, always remember that good and reliable
connections are a basic requirement for good sound and reliable operation. Bad
soldering of cables can result in intermittent audio signals or temporarily lost ground
connections, hence always use good cables. In case of doubt about making proper
connections, please see check the standard pin assignments required for proper
operation in the appendix of this manual.
It is also essential that high-gain inputs are terminated properly to avoid excess noise
contribution. Specifically, this applies to the PHONO inputs. If these inputs are not used
and the sensitivity is switched to “PHONO”, the inputs shall be terminated with the
supplied termination plugs (as factory-inserted at delivery).
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Powering up
Following a proper power-up sequence protects your equipment – specifically speakers
– and your ears. Follow the below procedure:
Turn down all output volume controls of any equipment in your audio system.
Switch on your audio sources first (Turntables, CD Players, PC’s with
soundcards, Tapedecks, etc.)
Switch on the audio mixer
Switch on any audio processor between the mixer and the amplifier(s) [if any].
Switch on the amplifier(s).
Turn up the audio level on your sources if such controls are provided.
Set the audio output of your mixer to a low level.
Set the audio output of any audio processor between the mixer and the
amplifier(s) to a medium level [if any such processors].
Turn up the volume controls of your amplifier(s) slowly.
Make adjustments to all volume settings as needed.
For switching off, follow the inverse sequence – always switch off your amplifier(s) first,
then any processors between mixer and amplifier(s), then the mixer, then the sources.