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31028
User Manual
29 pgs928.22 Kb0

Monoprice 31028 User Manual

6 Zone Home Audio Multizone 12-channel Amplifier
P/N 31028
User's Manual
CONTENTS
SAFETY WARNINGS AND GUIDELINES ....................................................................................................................................... 4
INTRODUCTION ................................................................................................................................................................................................ 5
FEATURES .............................................................................................................................................................................................................. 6
CUSTOMER SERVICE .................................................................................................................................................................................... 6
PACKAGE CONTENTS ................................................................................................................................................................................. 7
PRODUCT OVERVIEW ................................................................................................................................................................................. 7
SAMPLE CONNECTION DIAGRAM ................................................................................................................................................ 12
CONSTANT VOLTAGE VS LOW IMPEDANCE SPEAKER SYSTEMS .................................................................... 13
WIRE GAUGES ................................................................................................................................................................................................. 14
LINE CONNECTIONS................................................................................................................................................................................... 15
SPEAKER CONNECTIONS ....................................................................................................................................................................... 16
TRIGGER CONNECTIONS ........................................................................................................................................................................ 19
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RS-232 CONNECTION ................................................................................................................................................................................ 21
RS-232 COMMANDS .................................................................................................................................................................................. 21
TECHNICAL SUPPORT .............................................................................................................................................................................. 27
SPECIFICATIONS ........................................................................................................................................................................................... 28
REGULATORY COMPLIANCE ............................................................................................................................................................. 29
3
SAFETY WARNINGS AND GUIDELINES
Please read this entire manual before using this device, paying extra attention to these
safety warnings and guidelines. Please keep this manual in a safe place for future reference.
This device is intended for indoor use only. Do not expose this device to water or moisture of any kind. Do not place drinks or
other containers with moisture on or near the device. If moisture does get in or on
the device, immediately unplug it from the power outlet and allow it to fully dry
before reapplying power.
Do not touch the device, the power cord, or any other connected cables with wet
hands.
This device uses a grounded power cord and requires a ground connection for safe
operation. Ensure that the power source has a proper ground connection. Do not
modify the plug or use a "cheater" plug to bypass the ground connection.
Do not expose this device to excessively high temperatures. Do not place it in, on,
or near heat sources, such as a fireplace, stove, radiator, etc. Do not leave it in direct
sunlight.
This device ventilates excessive heat through the slots and openings in the case. Do
not block or cover these openings. Ensure that the device is in an open area where
it can get sufficient airflow to keep from overheating.
Prior to operation, check the unit and power cord for physical damage. Do not use if
physical damage has occurred.
Take care to prevent damage to the power cord. Do not allow it to become
crimped, pinched, walked on, or become tangled with other cords. Ensure that the
power cord does not present a tripping hazard.
Never unplug the unit by pulling on the power cord. Always grasp the connector
head or adapter body.
Ensure that power is turned off and disconnected before making any electrical
connections.
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Disconnect the unit from the power source when replacing the fuse. Replace the
fuse only with the same type.
Clean using a soft, dry cloth only. Do not use chemical cleaners, solvents, or
detergents. For stubborn deposits, moisten the cloth with warm water.
This device has no user serviceable parts. Do not attempt to open, service, or
modify this device.
INTRODUCTION
Thank you for purchasing this 6-Zone Home Audio Multizone 12-channel Amplifier! This
amplifier is a 12-channel audio distribution amp that can be configured for six stereo 4-8
ohm zones, six stereo 70/100V constant voltage zones, or three high powered 8-ohm
bridged zones. It supports any combination of stereo, bridged, and constant voltage zones.
Each zone can be controlled using the included IR remote control or RS-232 computer
control. The RS-232 section is bi-directional, with an easy to configure command structure.
It can be configured to automatically send zone status updates or respond to queries to
confirm zone status and settings.
It has an Audio Bus IN, which can be manually selected using the remote control, RS-232
commands, or a voltage trigger. The voltage trigger will switch the zone to use the Audio
Bus IN as long as there is voltage present on the zone Line / Bus Trigger IN. When the
voltage is removed, the zone automatically switches back to the zone Line IN, making it
ideal for global paging across an entire facility.
Additionally, each zone has a Mute Trigger IN, which mutes zone audio when voltage is
present. Each zone also has a +12 VDC Status or Control OUT, which can be used to activate
a zone specific voltage controlled device or otherwise indicate zone ON/OFF status. Audio
is rounded out with a built-in -20dB audio limiter for each zone, designed to prevent
incidental peaks from becoming irrevocable problems.
Finally, each zone features a Remote Bypass switch, which allows or blocks IR and RS-232
control for those zones that you want to set and not mess with again. You can select 110-
120 VAC or 220-240 VAC input voltage, allowing the amp to be used anywhere there is AC
voltage. It is rack mountable, with removable rack ears for shelf mounting.
5
FEATURES
Each zone can independently select a zone-specific stereo audio source or the
global unbalanced stereo Audio Bus IN
Each zone can be independently configured for stereo 4Ω/8Ω mode, high powered
bridged 8Ω mode, or 70V/100V constant voltage mode for total flexibility
All zones are independently controllable using the included IR remote control, RS-
232 control, and voltage trigger lines
Each zone has a built-in -20dB Audio Limiter Each zone has an independent mute trigger input Each zone has an individual Status Output that corresponds to the zone's ON/OFF
status
Front panel Zone ON and Zone Overload LED indicators for each zone Master global Control In and Control Out Detachable screw-terminal connectors for Zone IR IN, Zone Mute, Zone Status OUT,
and Zone Speaker Outputs
Global optical S/PDIF and analog stereo 3.5mm audio inputs for the global Audio
Bus IN/OUT
Rack mountable in a standard 19" equipment rack (2U height) Selectable 110-120 VAC, 60Hz or 220-240 VAC, 50Hz power input
CUSTOMER SERVICE
The Monoprice Customer Service department is dedicated to ensuring that your ordering,
purchasing, and delivery experience is second to none. If you have any problem with your
order, please give us an opportunity to make it right. You can contact a Monoprice
Customer Service representative through the Live Chat link on our website
www.monoprice.com during normal business hours (Mon-Fri: 5am-7pm PT, Sat-Sun: 9am-
6pm PT) or via email at support@monoprice.com
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PACKAGE CONTENTS
Please take an inventory of the package contents to ensure you have all the items listed
below. If anything is missing or damaged, please contact Monoprice Customer Service for a
replacement.
1x Amplifier
1x IR remote control
1x IR transmitter
1x AC power cord
1x User's manual
PRODUCT OVERVIEW
Front Panel
1. ZONE POWER LEDs: Six LEDs illuminate solid green when a stereo zone is ON and is
off when the zone is OFF.
2. PEAK OUTPUT LEDs: Six LEDs illuminate red when the amplifier is within 5% of the
maximum volume setting. To be safe, back off the volume a bit when this LED
illuminates to prevent damage to the amplifier or speakers.
3. RACK EARS: Two rack ears for mounting the amplifier in a standard 19" equipment
rack (2U height). If rack mounting, leave one empty rack space above and below to
allow for ventilation. The rack ears can be removed for shelf mounting, as desired.
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Rear Panel
1. 70V/100V HIGH VOLTAGE SPEAKER OUTPUT: Slide switch for selecting 70V or 100V
for all zones configured for constant voltage output. The U.S. National Electrical
Code prohibits the use of 100V constant voltage systems for installations in the
United States.
2. OPTICAL IN: S/PDIF digital optical audio input for BUS AUDIO. When OPTICAL IN is
used, 3.5mm BUS AUDIO IN (3) cannot be used and vice versa. The optical audio
signal is converted to analog and is distributed to the BUS AUDIO OUT (4) and to
each zone.
3. BUS AUDIO IN: 3.5mm TRS unbalanced stereo input jack for BUS AUDIO. When BUS
AUDIO IN is used, OPTICAL IN (2) cannot be used and vice versa. The analog signal is
distributed to the BUS AUDIO OUT (4) and to each zone.
4. BUS AUDIO OUT: 3.5mm TRS unbalanced stereo output jack for delivering BUS
AUDIO to another 6-zone amplifier, powered speakers, or other line level input
device.
5. SPEAKER OUTPUT: Removable screw-terminal plug for connecting the speaker
output(s). Each plug has six connections for different speaker output configurations,
as detailed below.
can result in permanent damage to the amplifier and/or the speakers.
Note that failure to adhere to the warnings in the notes below
Bridge 8Ω: Use the indicated terminals (2 and 5) to connect a single 8-ohm
speaker for bridged mono operation (100W@8Ω). WARNING! When using the
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Bridge 8Ω terminals, the 8Ω/4Ω-70V/100V switch (6) MUST be in the OUT
position and the Stereo-Bridged switch (11) MUST be in the IN (Bridged) position.
4/8Ω: Use the indicated terminals (2 and 3, 4 and 5) to connect a pair of 4-ohm
or 8-ohm speakers (30W@8Ω or 50W@4Ω). WARNING! When using the 4/8Ω
terminals, the 8Ω/4Ω-70V/100V switch (6) MUST be in the OUT position and the
Stereo-Bridged switch (11) MUST also be in the OUT (Stereo) position.
70/100V: Use the indicated terminals (1 and 3, 4 and 6) to connect a pair of
constant voltage speakers (30W@70V/100V). WARNING! When using the
70/100V terminals, the 8Ω/4Ω-70V/100V switch (6) MUST be in the IN position,
the Stereo-Bridged switch (11) MUST also be in the OUT (Stereo) position, and
the 70V/100V HIGH VOLTAGE SPEAKER OUTPUT switch (1) must be set to the
proper voltage.
6. 8Ω/4Ω-70V/100V: Push button switch to select passive (8Ω/4Ω) or constant
voltage (70V/100V) operation. 8Ω/4Ω operation is selected when the switch is in
the OUT position and 70V/100V operation is selected when the switch is in the IN
position.
7. IR IN/MUTE/STATUS: Connect the included IR transmitter to the IR IN and GND
terminals to allow for zone IR control using the included IR remote control. Connect
a +3 ~ +30 VDC@1mA control voltage to the MUTE and GND terminals to mute the
local zone. Connect a trigger enabled device to the STATUS and GND terminals to
provide a +12 VDC@1mA Status OUT signal to trigger the zone specific device.
8. LINE/BUS TRIGGER IN: 3.5mm jack for connecting a +3 ~ +30 VDC@1mA control
voltage to determine the zone's audio source. When there is no voltage present, the
zone uses its LINE IN RCA jacks (10) for the audio source. When a +3 ~ +30
VDC@1mA signal is present, the zone uses BUS AUDIO (2 or 3) for the audio source.
9. LIMITER: Push button switch to determine whether the built-in -20dB Audio Limiter
is used on not. The Audio Limiter is ON when the switch in the IN position and is
OFF when the switch is in the OUT position.
10. LINE IN: Two RCA jacks for connecting a line level stereo audio source.
11. STEREO/BRIDGED: Push button switch to determine whether the zone is set for
Bridged or Stereo operation. The zone is set for Stereo operation when the switch is
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