Integra MZA-4.7 Features, Multi-Zone, Multi-Source,Video Switching, Preamplifiers and Outputs

Features

Thank you for purchasing an Integra MZA-4.7 Multi-Zone Amplifier.

Please read this manual thoroughly before making connections and plugging in the unit.

Following the instructions in this manual will enable you to obtain optimum performance and listening enjoyment from your new Multi-Zone Amplifier.

Please retain this manual for future reference.

Multi-Zone, Multi-Source, Video Switching

The MZA-4.7 has four separate preamplifiers and ampli- fiers, providing 4 zones of independent yet integrated control.

There are seven stereo sources (S1 - S7) and an eighth mono source (S8) typically used for paging applications. Each zone has an eight-source composite video switcher, so monitor screen’s in four different rooms may display any of the eight sources (S1 - S8).

Preamplifiers and Outputs

Each zone has bass, treble, balance and loudness control. These are accessed either from the front panel or IMC (Integra Music Center) program.

The preamplifier output volume may be independent of the amplifier volume, or made to track the amplifier with an adjustable offset (± 20dB). The tracking feature is ideal for passive subwoofer control, while the indepen- dent volume feature is useful for limited control in closecoupled rooms.

A useful protection feature is “Maximum Volume limit- ing.” This limits the maximum volume of either the amplifier or preamplifier.

A MZA-4.7 may receive IR directly from the front panel receiver or via the two “Controller Interface” connec- tions.

There are zone specific IR commands and also a set of global IR commands.

The commands are: ON, OFF, Standby (toggling), Mute, Amp Volume Up, Amp Volume Down, Pre Volume Up, Pre Volume Down, Source Selects, On with Source Spe- cific commands.

The Global commands also include PRESET1 - PRE- SET 6, Alarm Enable, Alarm OFF, and 5 minute Sleep.

Real Time Clock

The MZA-4.7 is equipped with a real time clock. The amplifier may be set up to function as an alarm clock, so that at 6.30am in the morning 5 days a week, the master bedroom zone could be made to turn on, select tuner, and go to a specific volume. Multiple Alarms are feasible (max of 6) However the Alarm Enable & OFF commands act upon all programmed Alarms.

The clock continues to operate typically > 48 hours with- out power – more than enough to keep the time current during lengthy power outages.

Amplifier Power, Protection, and Clipping Indicators

50 Watts RMS per channel into 8 ohms, capable of driv- ing into 6 ohms.

The amplifiers are protected against short-term output shorts.

The front panel zone indicators will flash red when the zone amplifiers are overdriven into clipping.

Thermal Control

There are three progressive levels of thermal control:

•An internal fan is turned on to aid cooling.

•The amplifier volume is reduced 20dB.

•The amplifiers are shutdown until the temperature reduces below the first level.

Care should be taken to ensure adequate ventilation – see “Important Safety Instructions” on page 2.

USB, RS232 and IR Control

The MZA-4.7 may be controlled and monitored via either the front Panel USB or rear panel RS232 serial interface.

In multi amplifier installations where the amplifiers are interconnected using an expansion bus cable, only one USB or RS232 connection is required to control the stack of amplifiers.

IR Emitter Ports

There are 4 Buffered IR emitter Ports.

Two IR ports have routing, and are linked to their respec- tive “Controller Interface” ports. These ports control zone specific source components. Two IR ports are the sum of both IR sources; these control the All zone source components.

Presets and Paging

There are six amplifier presets and a page preset. Presets 1 - 6 are momentary and cause the amplifier to go to a predetermined setup, i.e. standby, volume & source selection.

The presets may also be programmed with event sched- uling, and are used by the alarm clock.

The “Page Preset” mode is for paging applications and is invoked by a contact closure between the “0V” and the “PG” terminals. When the contact closure is released the amplifier zones return to their previous states.

Zone Linking

A zone may be programmed to link one other zone. Zone linking ties the source selection together. It may also tie the volume, and standby.

This is useful for closely coupled audio areas where it is

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