Справочник Пользователя для Integra MZA-4.7

 

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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).

 

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.

 

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.

 

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.

 

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.

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.

 

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.

 

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.

 

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.

 

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