Knoll MR171 Installation And Operating Instructions

Installation and Operating
Instructions MR171 Paging Module
Congratulations and thank you for choosing this
Knöll product. The MR171 is a microphone paging
module suitable for use with most types of
condenser and dynamic microphones as well as line
level sources. It is specifically designed for use
with the MVP64 and Grande controller-amps as well
as the Ultimo and MR640 controllers. It features
automatic 30-volt phantom power, adjustable gain
and adjustable activation threshold sensitivity. It
can be triggered by either microphone or line
activity or by shorting its manual connector input
with a switch. When activated the MR171 sends a
digital signal to the amp or controller to turn on or
"override" all zones to a preset volume then
broadcast the page then automatically return all
zones to their previous volume and input states.
Installation
The MR171 should only be installed with the amp-
controller powered off and the mains power is
unplugged. Power for the MR171 is from the PS1202
power supply (included) and is usually left on.
Connecting a microphone
Use a conventional good quality microphone cable
with XLR connectors to connect the microphone to
the MR171. The MR171 is normally located behind
the controller or controller amp but does not have
to be. Some lower cost microphones will only have
two wire leads. We do not suggest using these, but
if required to do so, make sure before connecting
them that they will not be destroyed by the 30 volt
DC full time phantom power provided by the MR171.
Connect it to the mic plug (pins 2 and 3).
Connecting a line level paging input
Use a conventional good quality RCA line to
connect the source to the line level input. The
MR171 has a balancing transformer to reduce (but
non necessarily eliminate) hum from the cable.
Long cable lengths may require full balancing at
the source end.
Note: Never connect a microphone and a line
level paging input to together on the MR171.
Connecting the data line(s)
Use the provided 3.5mm to 3.5mm connecting
wire to connect the data port on the MR171 to the
data port on the controller or controller-amp.
If this system has more than one controller and/or
controller-amp, then the three wire data ports
(stereo 3.5mm jacks) need to be run in parallel.
The jack tips (inserted in the 2 or 3 controllers and
the MR171) all have to be connected together.
The three sleeves are connected together and the
three bases are connected together.
Connecting the stereo music source
If the Source 4 input on the controller or
controller amp is not being used skip the rest of
this paragraph. If you are still reading this, then
connect the stereo source input planned for Source
4 to the "In" jacks on the MR171 paging module.
Next connect the MR171 "Out" RCA jacks to the
controller or controller-amp Source 4 inputs using
a gold stereo RCA wire.
If this installation has more than one controller
and/or controller-amp use good quality Y cords to
connect each of the controller Source 4 jacks (in
parallel) to the MR171 stereo jacks labeled out.
Connecting for Manual Activation
Manual activation of the MR171 is features a
faster activation time than automatic voice
activation. A normally open single pole switch is
usually placed on or near the microphone. When it
is momentarily closed, paging is activated. Run a
wire pair (any kind of suitable wire will do) from
the activation switch to the MR171 "Manual"
screw terminal connector.
Be sure the MR171 "Auto" switch is in the "in"
position to prevent automatic voice activation.