Formula Sound ZMR - 243, Техническое руководство, Страница: 2 / 7

ZMR – 243 ZONER MIXER
INTRODUCTION & OPERATION
The ZMR-243 is a zoner mixer which is intended for use in clubs, bars, hotels, retail establishments
etc. It is a high quality unit with excellent technical performance. Its features include the ability to
operate as a stand alone unit, or by the addition of inexpensive passive remote panels, which are
available as optional extras, allows remote control of the music source and volume on any or all its
outputs (zones).
The ZMR-243 has 2 low impedance balanced microphone inputs, 4 stereo line (music) inputs, and
has 3 stereo (zone) outputs.
Front panel controls are logically laid out in 3 identical groups which relate to the 3 outputs. Each
group of controls has 2 rotary controls for Mic 1 and Mic 2 volume; 1 rotary control for music volume;
1 push button selector switch along with 4 leds showing the music input selection, and 1 led showing
if the remote panel is enabled.
A further group of 4 leds indicate microphone 1 & 2 enabled; priority signal present, and remote
music dim/mute activated.
An illuminated mains power on off switch completes the front panel controls.
The microphone inputs can be mixed or routed in any combination to any or all outputs.
The stereo inputs can be individually selected to any output via the push button. Pressing the button
cycles through the various inputs. The same button also enables the remote function, which allows
selection of the music sources from an optional remote panel. Adjacent leds provide clear indication
of this selection.
The volume of the music source may be adjusted either from the front panel or from a remote panel.
The front panel control may be internally bypassed to allow the volume to only be controlled remotely
if required.
Input gain controls are fitted to all inputs. These are accessible through holes in the rear panel.
Tone controls in the form of treble and bass (i.e. 2 band equalisation) are fitted to both microphone
inputs and all of the 3 stereo outputs affecting music sources only. These are also accessible through
holes in the rear panel.
The output sections of the ZMR-243 are on plug in cards, which gives it a two-fold advantage. Firstly,
although the mixer has three outputs, one of the output cards may be left out to reduce the cost of the
unit. This leaves the flexibility to add the output card at a later date to extend the facilities should the
need arise. Secondly the unit is much easier to service in the unlikely event of breakdown.
Any or all outputs may be operated as a pair of mono outputs sharing the same sources but having
the ability to operate at different volume levels, both remotely controlled, if required. One of the mono
pair could also select the music source remotely.
Provision to connect the ZMR-243 to a fire alarm has been provided to satisfy the requirements of fire
safety. This requires a fully isolated pair of contacts from the alarm panel. It is labelled as music dim
/ mute. The attenuation level of the music signal is fully adjustable via an internal pre-set.
Accidental operation
The selector push buttons can be easly disabled to prevent accidental operation by pressing selector
buttons 1 and 3 together i.e. at the same time.
Pressing 1 & 3 together again reverts back to normal operation.
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