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Idiomas disponibles
4
IN
3
4
OUT
3
2 IN 1
-10 dBV
Set-up and Operation
Power State
STATUS
RESET
CAL
NETWORK
70V
This amplifier does not have a power switch. It will turn on
3s
25V
6s
SIGNAL
100V
automatically when AC power is connected and it will go to standby
4
IN
3
2
IN
1
2 IN 1
mode if no signal is present for 25 minutes.
When an input signal exceeding -60dB relative to the level needed for
-10 dBV
full power is applied, the amplifier will go back on within 2 seconds.
DSP and matrix configuration
The amplifier comprises a comprehensive range of functions that
can be setup in two ways.
• Automatic - without the use of any app or software.
• Advanced - use the software to set more parameters and
STATUS
RESET
optimize the functionality.
CAL
NETWORK
70V
3s
Automatic configuration
25V
6s
SIGNAL
100V
4
IN
3
4
OUT
3
This is a very easy way to configure the amplifier that doesn't require
2 IN 1
any software. It is ideal if all you want is an amplifier with a flat
-10 dBV
frequency response that can be monitored and, if it is an AD model, get
audio routed to it with third party software.
The automatic setup will set limiters so that a channel reaches the
STATUS
RESET
maximum capacity of the power supply, with a 4 dBu balanced analog
CAL
NETWORK
70V
3s
25V
input (or -6 dBFS for Dante/AES67). This means that it also adjusts the
6s
SIGNAL
100V
gain so that the amplifier has the gain needed for all channels. The
4
IN
3
2
IN
1
2 IN 1
way to "assign power" is then simply done by adjusting the level of the
content to the different channels.
-10 dBV
It will also set the high-pass filters automatically. The cutoff will be
selected so that frequencies below the resonance frequency, as well
as frequencies that saturate transformers in Hi-Z loudspeakers, will be
attenuated.
Note! Automatic configuration is only possible, and repeatable, when
no amplifier settings and parameters have been manually altered. In
the case of manual changes, it will still be possible to trigger the auto
configuration, but for verification and monitoring purposes only. The
new measured values will not be saved until settings and parameters
are set back to their initial values or a factory reset is done. In order to
STATUS
NETWORK
restore Mezzo's factory default mode, start by unplugging the mains
SIGNAL
cable. Press and hold the push button on the amplifier's rear panel and
4
IN
3
reconnect the mains cable while still pressing the button. Wait for the
amplifier state LEDs to blink in red for three times and release.
2
1
Step 1 - Select the maximum voltage
STATUS
NETWORK
SIGNAL
4
IN
3
4
3
2
1
No channel will ever be assigned limiters that exceed the power of the
power supply. The main reason for selecting the maximum voltage is
to ensure that 25/70/100V loudspeakers will get the power selected
on their tapping, if a channel is using less power than it can deliver.
If the application is 25V or 70V, then there is a risk that the limiters
get set too high if the connected load isn't requiring full power. The
maximum voltage can be selected with short presses on the push
button on the amplifier's rear panel. The selected voltage will be
displayed as follows:
70V
100V
Max Peak
Max RMS
LED
LED
Voltage
Voltage
Unlit
Lit
141.4 V
100 V
peak
Lit
Unlit
100 V
70.7 V
peak
Lit
Lit
35.4 V
25 V
peak
Unlit Unlit
Custom Settings
Please note that for low-impedance loads, it is not necessary to select
the maximum voltage.
MEZZO 602 AD
I4 I3 I2 I1 5V
ETH
MEZZO 604 AD
I4 I3 I2 I1 5V
ETH
MAINS
MEZZO 602 AD
I4 I3 I2 I1 5V
ETH
MAINS
MEZZO 604 AD
I4 I3 I2 I1 5V
SWITCHED
CAL
70V
3s
25V
6s
100V
CTRL +
CTRL +
4
OUT
3
CTRL
2 IN 1
-10 dBV
I4 I3 I2 I1 5V
SWITCHED
CAL
70V
3s
25V
6s
100V
CTRL +
CTRL +
2
IN
1
CTRL
2 IN 1
-10 dBV
I4 I3 I2 I1 5V
Description
Also works in mixed 100V and low impedance
configurations
rms
Also works in mixed 70V and low impedance
configurations
rms
Also works in mixed 70V and low impedance
configurations
rms
This can't be selected from the rear panel. The
limiters have been set manually in the software
and can't be changed without a factory reset
MAINS
2
Step 2 – Calibrate
MAINS
4
3
2
Press the push button until the 'Signal' LED turns purple, and then
release it within 2 seconds. This will trigger an automatic impedance
measurement for each channel. This will be made at a level that is high
enough to properly measure an 8 ohm loudspeaker. If the impedance
is higher, the measurement might be deemed to be too noisy and will
then repeat itself automatically. Please note that it may generate an
SPL exceeding 95 dB if the loudspeakers are sensitive enough.
The impedance measurement will automatically set warning thresholds
for monitoring changes. It will also set the limiters so that the channel
can play as loud as the design and model allows, without distortion.
2
Step 3 - Select the Ethernet mode of operation (AD models)
4
3
2
Press the push button until the 'Network' LED turns purple, and then
release it within 2 seconds. This will reset the amplifier to auto-IP and
it will toggle the Ethernet mode and update the "Switched" indicator:
• Unlit: The internal Ethernet switch is disabled => the two ports
are not connected and the right port is then internally assigned
for Dante/AES67. The left port is only for control/monitoring the
amplifier's DSP.
• Lit: This is the default "switched mode". The internal Ethernet
switch is enabled => the two ports are connected and will both
work for for Dante/AES67 and control/monitoring of the amplifier's
DSP. It means that only one Ethernet cable is necessary for control
and digital audio. It also means that the product can be inserted in
a daisy chain of other Gigabit Ethernet products as long as there is
enough bandwidth.
Step 4 - Routing and control via GPI
I/O Routing - 4-Channel models
All 4-channel models allow straight 4-in/4-out analogue routing,
where analogue inputs labelled 1 and 2 are a summation of balanced
and unbalanced inputs. When using unbalanced inputs only, these
will get a 12dB boost so that normal unbalanced sources will deliver
enough level to drive the amplifier to full power. When using both
balanced and unbalanced inputs simultaneously, the latter will get a
further -30dB reduction, so that priority is given to balanced sources.
I/O Routing - 2-Channel models
All 2-channel models have mixed two unbalanced inputs (labelled
1 and 2) and two balanced inputs (labelled 3 and 4), meaning that
balanced and unbalanced sources can be used.
I/O Routing - Dante/AES67 (AD models)
In AD models, additional four Dante/AES67 inputs and outputs are
available. For these models, the source selection strategy is enabled
by default, with Dante/AES67 inputs having a higher priority over the
corresponding analogue inputs when audio signal is coming from
both source types simultaneously. The source selection and priority
settings can be configured from ArmonìaPlus or a third-party API.
VCA Operation via GPIs
In 4-channel models, the four GPI terminals located on the amplifier's
rear panel can be connected to 10kOhm passive potentiometers to
attenuate the output levels. Each GPI connector (I1, I2, I3, and I4)
corresponds to one output channel (1, 2, 3, and 4 respectively).
In 2-channel models, the output levels of channels 1 and 2 can be
attenuated with via GPI connectors I1 and I2, respectively.
4
IN
3
4
OUT
3
2 IN 1
1
-10 dBV
STATUS
SWITCHED
CAL
NETWORK
70V
3s
25V
6s
SIGNAL
100V
4
IN
3
2
IN
1
2 IN 1
1
-10 dBV
STATUS
SWITCHED
CAL
NETWORK
70V
3s
25V
6s
SIGNAL
100V
4
IN
3
4
OUT
3
2 IN 1
1
-10 dBV
STATUS
SWITCHED
CAL
NETWORK
70V
3s
25V
6s
SIGNAL
100V
4
IN
3
2
IN
1
2 IN 1
1
-10 dBV
CTRL
EN
I4 I3 I2 I1 5V
CTRL +
CTRL +
CTRL
I4 I3 I2 I1 5V
CTRL +
CTRL +
CTRL
I4 I3 I2 I1 5V
CTRL +
CTRL +
CTRL
I4 I3 I2 I1 5V
MEZZO Series | 5
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