powersoft Mezzo Series - Preliminary operations; Package list; Location; Cooling

4 | T Series
EN
Locaon
Install your amplier in locaon that allows some exchange of air.
Amplier comes with mounng accessories for the following
mounng opons
Surface mount – Using 2 “bracket B” it’s possible to mount an
amplier vercally on a wall or upside down under a table or in a
ceiling.
Tandem 19” rack mount – Using the 2 “bracket B” it’s possible to
mount two Mezzo side to side and then mount them using the 2
“bracket A” in 1 RU in a 19” rack.
Single 19” rack mount – Using the 2 “bracket A” it’s possible to
mount a single amplier in a 19” rack.
Single half rack mount – Using the 2 “bracket A” it’s possible to
mount a single amplier in a half width rack.
On a shelf – Aach the rubber feet to the boom of the amplier
and place it on the desired surface.
Plenum mount – 320 W models are approved for placement in air
handling spaces above the ceiling if the mains cable is mounted
inside the plenum mount accessory (sold separately).
Custom mount – It’s possible to custom design ngs for poles and
other applicaons using screws ng the threaded holes in the
amplier. These screws must not be longer than XX mm. The safest
way to avoid mistakes is to use the provided screws.
Cooling
The 600W models implement a temperature controlled forced-air
cooling system. Air enters from the front and exists at the back of
the amplier. The fan has 3 modes:
STILL - if the temperature of the space surrounding the amplier is
≤35C and the average power out is ≤1 W per channel. (≤84 dB SPL*)
WHISPER - if the average output is ≤4 W per channel. The fan noise
at 1 m is ≤30 dBA in this mode. (≤90 dB SPL*)
REGULATED - Mezzo adapts the speed of the fan to stay cool. The
fan noise at 1 m is ≤45 dBA in this mode. (≤105 dB SPL* depending
on model and power sharing)
In the rare event of overheang the amplier will mute all channels
and run the fans to reach a safe temperature and start operang
again.
It’s ok to stack ampliers on top of each other in a rack, but it’s
recommended to put them in banks of 4 RU and then leave a 1 RU
space.
*(SPL at 2 m with 90 dB1W1m sensivity)
Package list
The box contains the following:
1 Mezzo amplier
Block connectors
4 rubber feet
2 Bracket A
2 Bracket B
6 screws (for aaching the brackets)
Mains power cable
Preliminary operaons
The amplier comprises a comprehensive range of funcons that
can be setup in two ways.
• Automac - without the use of any app or soware.
• Advanced - use the soware to set more parameters and
opmize the funconality.
DSP and matrix conguraon
This amplier does not have a power switch. It will turn on
automacally when AC power is connected and it will go to standby
mode if no signal is present for 25 minutes.
When input signal exceeding -60 dB relave the level needed for
full power is applied the amplier will go back on within 2 seconds.
70V
LED
100V
LED
Max Peak
Voltage
Max RMS
Voltage
Descripon
Unlit Lit 141.4 V
peak
100 V
rms
Also works in mixed 100V and low
impedance conguraons
Lit Unlit 100 V
peak
70.7 V
rms
Also works in mixed 70V and low
impedance conguraons
Lit Lit 35.4 V
peak
25 V
rms
Also works in mixed 70V and low
impedance conguraons
Unlit Unlit Custom Sengs
This can’t be selected on the rear panel.
The limiters have been set manually
in the soware and can’t be changed
without a reset to factory defaults
This is a very easy way to congure the amplier that doesn’t
require any soware. It is ideal if all you want is an amplier with a
at frequency response that can monitored and if it is an AD model
get audio routed to it with third party soware.
The automac setup will set limiters so that a channel reaches the
maximum capacity of the power supply with -4 dBu balanced analog
input (or -6 dBFS for Dante/AES67). This means that it also adjusts
the gain so that the amplier has the gain needed for all channels.
The way to “assign power” is then simply done by adjusng the
level of the content to the dierent channels.
It will also set the high pass lters automacally. The cuto will be
selected so that frequencies below the resonance frequency as well
as frequencies that saturate transformers in Hi-Z loudspeakers will
be aenuated.
Note! Automac conguraon is only possible when the amplier is in its
factory default mode. Factory default is indicated by 5 seconds long blinks
of the 70V and 100V LEDs. In order to restore Mezzo's factory default
mode, press and hold the mode buon on the rear panel for 10 s.
Step 1 – Calibrate
STATUS
NETWORK
SIGNAL
SWITCHED
70V
100V
25V
CAL
6s
3s
CTRL +CTRL +
CTRL
I4 I3 I2 I1 5V
-10 dBV
4 IN 3
MAINS
2 1
2 IN 1
OUT4 3
MEZZO 602 AD
STATUS
NETWORK
SIGNAL
70V
100V
25V
CAL
6s
3s
I4 I3 I2 I1 5V
-10 dBV
4 IN 3
MAINS
2 1
2 IN 1
ETH
OUT4 3
RESET
MEZZO 322 A
STATUS
NETWORK
SIGNAL
70V
100V
25V
CAL
6s
3s
I4 I3 I2 I1 5V
IN2 1
-10 dBV
4 IN 3
MAINS
4 3 2 1
2 IN 1
RESET
ETH
MEZZO 324 A
STATUS
NETWORK
SIGNAL
SWITCHED
70V
100V
25V
CAL
6s
3s
CTRL +CTRL +
CTRL
I4 I3 I2 I1 5V
IN2 1
-10 dBV
4 IN 3
MAINS
4 3 2 1
2 IN 1
MEZZO 604 AD
Press the mode buon unl it fast blinks twice aer 2 s, release it
within 2 s aer it has blinked. This will trigger an automac impedance
measurement taking 1 s per 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 it will
then repeat itself automacally. Please note that it may generate an SPL
exceeding 95 dB if the loudspeakers are sensive enough.
The impedance measurement will automacally set warning thresholds
monitoring change. It will also set the limiters so that the channel can
play as loud as the design and model allows, without distoron.
Step 2 - Select the maximum voltage
STATUS
NETWORK
SIGNAL
SWITCHED
70V
100V
25V
CAL
6s
3s
CTRL +CTRL +
CTRL
I4 I3 I2 I1 5V
-10 dBV
4 IN 3
MAINS
2 1
2 IN 1
OUT4 3
MEZZO 602 AD
STATUS
NETWORK
SIGNAL
70V
100V
25V
CAL
6s
3s
I4 I3 I2 I1 5V
-10 dBV
4 IN 3
MAINS
2 1
2 IN 1
ETH
OUT4 3
RESET
MEZZO 322 A
STATUS
NETWORK
SIGNAL
70V
100V
25V
CAL
6s
3s
I4 I3 I2 I1 5V
IN2 1
-10 dBV
4 IN 3
MAINS
4 3 2 1
2 IN 1
RESET
ETH
MEZZO 324 A
STATUS
NETWORK
SIGNAL
SWITCHED
70V
100V
25V
CAL
6s
3s
CTRL +CTRL +
CTRL
I4 I3 I2 I1 5V
IN2 1
-10 dBV
4 IN 3
MAINS
4 3 2 1
2 IN 1
MEZZO 604 AD
No channel will ever be assigned limiters that exceed the power
of the power supply. The main reason for selecng 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 applicaon 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. This
is xed with short presses on the mode buon unl it shows the
desired maximum voltage: