Soundavo MZ-1650S User manual

OWNERS MANUAL
MZ-1650S
MZ-1250S
MZ-850S POWER AMPLIFIER
MULTI ZONE

WARNING
1. Do not place or install this device in an area where it can be exposed to excessive amounts of
dust, humidity, oil, smoke, or combustible vapors.
2. To prevent risk of electrical shock or fire hazard, due to overheating do not obstruct unit’s
ventilation openings.
3. Do not install near any source of heat, including other units that may produce heat.
4. 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
5. Do not touch the device, the power cord, or any other connected cables with wet hands.
6. 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.
7. Only clean unit with a dry cloth.
8. Unplug unit during lightning storms or when not used for an extended period of time.
9. Protect the power cord from being walked on or pinched, particularly at the plugs.
10. Use unit only with accessories specified by the manufacturer.
11. Refer all servicing to qualified personnel.
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Thank you for purchased Soundavo product. 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.

FRONT PANEL
The Soundavo MZ series multichannel power amplifiers are ideal for use in adding additional
power in distributed audio systems or combining with the commercial sound installation, home
theater applications. The MZ-850S provides 8 channels, MZ-1250S provides 12 channels and
MZ-1650S provides 16 channels of digital amplifications. All models designed in great features
such as bridge mode operation, global and independent zone triggering, audio sense circuitry
with delay time per zone, two Bus Inputs/Outputs and independent line inputs per zone to meet
the wild range of audio applications and projects.
All amplifiers are rated at 50 watts per channel into 8 ohms and 80 watts per channel into 4
ohms. With the Stereo/Bridge switch in the Bridge mode, each zone of channels are combined
for a higher powered mono output of 160 watts into 8 ohms. With the high performance and
ultra-low distortion output, MZ series amplifiers provide the excellent of sound quality for the
audio systems.
INTRODUCTION
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THERMAL PROTECTION
All MZ series amplifiers are designed with special circuitry to safeguard the amplifier under a
thermal overload condition. Thermal protection mode will only engage when the unit has been run
at high volume for extended periods of time without adequate ventilation and/or when speaker
impedances are below the minimum levels for the amplifier. In thermal protection mode the
amplifier will automatically stop output. If this fault occurs, turn off the amplifier, and check that the
speaker impedance rating is above the minimum rating. Also check for adequate ventilation
around the amplifier and make adjustments if necessary. Once the unit has cooled to sage
operating temperatures, the amplifier may be powered back on.
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PROTECTION CIRCUITRY
INSTALLATION
Special circuitry has been designed into the amplifier to safeguard under a short-circuit condition.
A faulty speaker can also cause a short circuit condition. The Zone LED will blink rapidly between
Red and Blue If this fault condition occurs, turn off the amplifier and check speakers for short
circuit conditions when appropriate.
The amplifier can be placed on a shelf in an equipment rack, or on a table or cabinet. Be sure the
required clearances for ventilation and heat dissipation. The amplifier will take two rack spaces
with the feet removed.
1. Power/Standby LED
This LED lights red when any zone is active or
the amplifier is in standby mode.
2. Zone LED
Blue: the corresponding zone is powered on.
OFF: the corresponding zone is off (standby mode).
Red/Blue: A short circuit happens on the speaker outputs.

REAR PANEL
1. Bus 12VDC Trigger In/Out
The trigger input is a handy feature when
connecting the amplifier to an automated audio
system, The 3.5mm mini- plug jack will accept a
3-30V AC/DC output from another device, or
from a separate power supply.
The Bus 12VDC Trigger In is used to activate all
zones that are using the Bus Input and disables
other zone triggers or signal sensing on those
zones when it is used. When the Bus 12VDC
Trigger is used, all Bus-controlled zone LEDs will
be blue and active.
If the Bus Trigger In has 12V applied to it, only
the 12V Bus Trigger Out will have 12V and the
Zone Trigger Outputs will not.
2. Bus Inputs/Outputs
The MZ-series amplifier has two common or BUS
inputs that receives audio signals from standard
line-level audio sources that can be used to
connect a single source to multiple zones. The
BUS line outputs are passive pass through the
corresponding of the Bus Inputs and can be
used to daisy chain the source to other
amplifiers in the system. Be sure to use high
quality RCA cables that feature low impedance,
shielding and high quality connectors.
3. Input Selection Switch
Each channel is capable of delivering the source
from many inputs, select the BUS IN (1 or 2),
OPTICAL IN, and Local LINE IN for the output.
The selection for these inputs is done via the
Input Selection switch associated with each
channel. Select the desired source input. Set the
Input Selection switch to BUS IN (will play source
connected to the BUS 1 or BUS 2 input),
OPTICAL IN (will play source connected to the
OPTICAL input) or LINE IN (will play source
connected to that channel’s LINE IN).
CAUTION: Only change switch positions when
the amplifier is turned off.
4. Optical Input
For components with Digital Optical Outputs sending
digital audio signals to each zone
5. Line Input
Local input for zone (plays only on that zone’s outputs).
Use for instances where the zone will always play a
different source than other zones. Set the Channel Input
Selector switch to “Line In” to use this input.
6.12VDC Trigger In/Out (Each Zone)
The Zone 12V Trigger In is used to activate a specific zone.
The Zone Trigger Out can be used to trigger other 12V
devices. The delay and audio sensing are bypassed when
the 12V Zone Trigger Input is used. When a Zone Trigger
is active, the zone LED will be blue. If no voltage is present
in the Zone Trigger, the Zone LED will be off.
7. Speaker Outputs
The MZ-Series amplifier uses high quality Phoenix style
connectors for the speaker connections. Use 14-18 gauge
stranded two-conductor loudspeaker wire. Ensure that at
least 2 inches of each conductor are separated. Strip
away 1⁄4 inch of insulation from each conductor. Connect
the appropriate conductor to each screw terminal,
observing correct polarity. Also, please observe proper
speaker wiring when bridging channels.
The minimum speaker impedance is 4 ohms for Stereo
Mode and 8 ohms for Bridge Mode.
8.Stereo/Bridge Switch
Select whether a pair of left and right output channels are
individual or bridged together for a more powerful mono
channel, the Bridge Output mode is ideal for powering
larger speakers or speakers on long cable runs.
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SPECIFICATIONS
Power Output:
80W /Channel, 1KHz into 4 Ohms, One Zone Driven
50W /Channel, 1KHz into 8 Ohms, One Zone Driven
160W, 1KHz into 8 ohms, Bridge
Amplifier Channels:
MZ-850S: 8 Channels, 4 Zones
MZ-1250S: 12 Channels, 6 Zones
MZ-1650S: 16 Channels, 8 Zones
Signal-to-Noise Ratio: >90dB A-weighted
Frequency Response: 20Hz to 20KHz +1.7/-1dB at 1W output into 8 Ohms
Input Sensitivity: 600 mV for 80W @ 1 KHz 4 Ohm One Zone
700 mV for 50W @ 1 KHz 8 Ohm One Zone
Input Impedance: >22K Ohms Line Input
Trigger Inputs/Outputs: Bus and Zone @12VDC
Zone Line Input: Line In, Bus In 1 or 2, Optical In select switch per zone
Bridge Mode: Select Stereo or Bridge mode per zone 8 Ohm only
Speaker Connectors: Detachable speaker terminals support up to 14awg wire
Delay Time: Can be adjusted per each zone to either 5 seconds, 5 minutes, or 10
minutes .
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Power Requirements (Switchable):
MZ-850S: 100-120VAC 60Hz 600W Max
220-240VAC 50Hz 600W Max
MZ-1250S: 100-120VAC 60Hz 900W Max
220-240VAC 50Hz 900W Max
MZ-1650S: 100-120VAC 60Hz 1200W Max
220-240VAC 50Hz 1200W Max
Fuse Rating:
MZ-850S: 100-120V/T5A, 250V
220-240V/T2.5A, 250V
MZ-1250S: 100-120V/T8A, 250V
220-240V/T4A, 250V
MZ-1650S: 100-120V/T10A, 250V
220-240V/T5A, 250V
Dimensions:
MZ-850S: 16.81”W x 3.46” H x 16.14”D (42.7 x 8.8 x 41.0 cm)
MZ-1250S: 16.81”W x 3.46” H x 16.14”D (42.7 x 8.8 x 41.0 cm)
MZ-1650S: 16.81”W x 3.46” H x 16.14”D (42.7 x 8.8 x 41.0 cm)
Weight:
MZ-850S: 8.6Kg (19lbs.)
MZ-1250S: 9.3Kg (20.5lbs.)
MZ-1650S: 10Kg (22.08lbs.)
9. Gain Controls
Left and Right gain controls for each zone adjust
the sound level independently (Counterclockwise
for minimum; clockwise for maximum.)
This allows the output level of each speaker to be
perfectly matched to its area. It can also be used
to limit the maximum audio level in a certain area.
Only using Left control to adjust the sound level
when used in Bridge Mode.
10. Standby Delay Switch
The standby delay time can be adjusted per each
zone to either 5 seconds, 5 minutes, or 10 minutes
by using the DIP switches on the rear panel, the
time delay is selected by moving the DIP switch to
the down position.
When an audio signal is not present, the amplifier
will automatically go into standby mode after the
preset period of time (the default position for the
DIP switch is a 5-second delay)
One and only one DIP switch must be in the Down
position at any time. Activating more than one DIP
switch can lead to erratic audio operation.
11. Voltage Switch
The unit is set at the factory for 115V U.S. operation; simply
connect the included IEC power cord to your wall outlet. For
230V operation, move the voltage selector switch to the 230V
position. When operating at 230V the internal fuse located in
the IEC socket should also be changed. In most 230V
applications a separate power cord will be required and is not
included.
12. AC Input
Apply the correct voltage before operate the amplifier.

SYSTEM CONFIGURATION
Typical Mode
MZ-Series amplifiers can be configured as the main amplifier for an audio distribution system or
home theater system. When used with an audio distribution preamp or Matrix processor, each
zone can independently
drive one of several different sources by using each zone’s individual line audio inputs. If the
specify zone needs a higher power, please just use Bridged mode.
When MZ-1650S or MZ-1250S or MZ-850S is working as a home theater amplifier, the amplifier
could support up to a 7.1 or 5.1 surround system, and recommend using the Bridged mode to have
the higher outputs.
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DVD
Bridge
L+
L- R-R+
+ -
Left
Speaker
Right
Speaker

Bridged Mode
When the amplifier is in Bridged mode operation, a single channel (the left) is used to provide a
higher power mono output. Use one channel pair to amplify the left channel by connecting the
left audio signal to the L input of a channel pair, setting the Stereo/Bridge switch to "Bridge" and
connecting the speaker as indicated below. Use a second channel pair for the right channel by
connecting the right audio signal to the L input of a second channel pair, setting the Stereo/Bridge
switch to "Bridge" and connecting the speaker as indicated below
Wiring Instructions - Bridged Mode
* Turn off the amplifier and connect an 8-ohm minimum load.
* Set the Stereo/Bridge switch to Bridged Mode.
* Follow the Bridge mode markings on the back of the amplifier:
Connect the negative lead (-) of the speaker cable to the R– terminal.
Connect the positive lead (+) of the speaker cable to the L+ terminal.
* Apply the Line In from audio source to the Left Line In connector.
* Power on the amplifier.
DVD
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Bridge
L+
L- R-R+
+ -
Speaker