2
ARCHITECTS SPECS
The unit shall be a monaural four zone audio routing matrix. Each zone shall have a front panel volume attenuator, controlling
both balanced XLR and unbalanced RCA output jacks. There shall be an eleven segment LED meter and a clip LED to monitor
the audio output level. The unit shall have four stereo source inputs, via unbalanced RCA jacks, summed to mono and assigned
to the zones through a front panel four by four switching matrix. Routing assignments shall be made by an “input first” or “zone
first” selection method and illuminated LEDs shall display the active connections. The unit shall have, additionally, four mono
priority audio inputs whose signal can override or mix with source inputs in any zone to which the priority input is assigned. The
priority inputs shall have a cascading hierarchy. Priority Input 4 shall be overridden by Priority 3, both 3 and 4 overridden by
Priority 2, and Priority 1 overrides all others that are assigned to the same Zone. The priority inputs shall have balanced female
XLR and TRS, and unbalanced RCA connections. Input select, pad and ducking switches shall be provided on each priority
input. The unit shall provide connection to optional remote control accessories for volume and source selection.
The unit shall use digital signal processing to provide functions of input audio level trim on all eight inputs, maximum output level
setting on all four outputs, twelve four band equalizers, priority signal output gain and zone assignment with ducking, LED meter
monitoring of all functions, four by four source routing matrix, and four zone volume attenuators. All functions shall be adjusted
and controlled through front panel controls and rear panel switches. A password lockout feature shall be available to prevent
unauthorized alteration of system setup functions. The unit shall store all system settings in non-volatile EEPROM.
The unit shall be standard rack mount, 19” wide 3.5”(2RU) high, with a depth of 10” behind the rack mounting ears. The unit shall
operate with 100 to 250 VAC 50/60Hz and be fan cooled. The unit shall be model MPM4.
FACTORY RESET INITIALIZATION
In the event of moving the MPM4 from one installation to another, it may be desirable to return the settings of the unit to their
factory default condition. Disconnect the power from the unit and locate the two-pin shorting jumper on the back of the display
circuit board behind the LED matrix inside the MPM4. (See diagram on page 5.) Remove the jumper plug and push it onto the
Factory Reset pins #1 and #2 located on the three-pin reset header to the left. Apply power, wait for the turn on sequence to
complete and remove power. Return the two-pin jumper plug to it's storage pins. This will restore the following initial factory
settings.
TABLE OF CONTENTS
Architects Specifications
Factory Reset Initialization
Operational Summary Reference Guide
Normal Mode System Description
Setup Mode Password Access
Rear Panel Description
Setup Modes Description
Typical Setup Procedure Guide
Block Diagram
Theory of Operation
Specifications
Warranty
2
2
3
4
5
6
8
9
10
10
12
12
Password
Zone Volume Controls
Source Inputs to Zone Outputs
Priority Assign Controls
Unlocked, Set to (Z1,Z2,Z3,Z4)
Maximum
No Routing Assignments
No Assignments, Minimum Level
Input Trim Controls
In and Zone EQ Controls
Zone Max Level Controls
Priority Trim Controls
Priority EQ Controls
Minimum
Flat
Minimum
Minimum
Flat
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