Subzero AMPLIFIER Series User manual

SUBZERO
AMPLIFIER
SERIES
USER MANUAL
SZ-ZA120/ZA240

2
WARNING! EN
Do not open cover. No user-serviceable parts inside. Refer servicing to qualified
service personnel. Do not place the product in a location near a heat source such as a
radiator, or in an area subject to direct sunlight, excessive dust, mechanical vibration
or shock. The product must not be exposed to dripping or splashing and no objects
filled with liquids, such as vases, shall be placed on the product
No naked flame sources, such as lighted candles, should be placed on the product
Allow adequate air circulation and avoid obstructing vents (if present) to prevent
internal heat build-up. The ventillation must not be impeded by covering the
appliance with items such as newspapers, table-cloths, curtains etc.
VAROVÁNÍ! CZ
Nezakrývejte. Uvnitř nejsou žádné součásti opravitelné uživatelem. S požadavkem na
servis se odkažte na kvalifikované servisní oddělení.
Neumisťujte produkt v blízkosti zdroje tepla, jako je radiátor, nebo na místo s přímým
slunečním světlem, nadměrným prášení, mechanickými vibracemi nebo šokem.
Produkt nesmí přijít do kontaktu s vodou a žádné objekty naplněné tekutinami, jako
například vázy, by neměly být umístěny na produkt.
Žádné zdroje otervřeného ohně, jako například svíčky, by neměly být umístěny na
produkt.
Umožněte dostatečnou cirkulaci vzduchu a vyhněte se obstrukci ventilátorů (pokud
jsou přítomné) pro předejití interního přehřívání. Ventilace nesmí být narušena
překrytím zařízení výrobky jako např. noviny, kuchyňské utěrky, záclony apod.
DVARSEL! DK
Dækslet må ikke åbnes. Ingen bruger-udskiftelige dele indeni. Overlad service til
kvalificeret service personale
Placer ikke produktet i nærheden af varmekilder såsom en radiator eller i direkte
sollys, meget støv, mekaniske vibrationer eller stød
Produktet må ikke udsættes for vand eller stænk, og ingen genstande fyldt med
væsker, f.eks. vaser, må anbringes på produktet
Må ikke placeres nær åben ild, tændte stearinlys må ikke placeres på produktet
Vær sikker på at der er tilstrækkelig luftcirkulation og undgår at dække ventiler (hvis
der er nogen) for at undgå at produktet bliver varmt. Ventillationen må ikke blokeres
med overdækning af apparatet med genstande som aviser, dug, gardiner osv.
WAARSCHUWING! NL
Maak de behuizing niet open. Dit toestel bevat geen onderdelen die door
de gebruiker kunnen worden vervangen.Laat onderhoud over aan bevoegd
onderhoudspersoneel. Plaats het produkt niet in de buurt van een hittebron zoals
een radiator of in direkt zonlicht of in een stofrijke omgeving, mechanische vibratie
of schok. Plaats het produkt niet in de buurt vanspattende of lekkende voorwerpen
gevuld met een vloeistof zoals bijvoorbeeld een vaas. Er mogen geen open vlammen
zoals aangestoken kaarsen op de apparatuur worden geplaatst. Zorg om overhitting
te voorkomen voor voldoende ventilatie enbellemmer ventilatieroosters niet. Bedek
het produkt niet met dingen zoals kranten, tafellakens, gordijnen etc.
VAROITUS! FI
Älä avaa kantta. Ei sisällä käyttäjä-huollettavia osia. Huollot saa suorittaa vain pätevä
huoltomies.
Älä säilytä tuotetta minkään kuuman lähellä kuten patteri tai suorassa
auringonpaisteessa, pölyisessä, mekaanisessa värinässä tai iskussa
Tuotetta ei saa altistaa tippuvalle tai loiskeelle tai nesteitä sisältäviä tuotteita kuten
maljakko eivät saa olla tuotteen lähettyvillä
Avotulia kuten sytytetty kynttilä ei saa olla tuotteen päällä.
Salli riittävä ilmankierto ja vältä tuuletusaukkojen tukkiminen (jos sellaisia on olemassa)
estämään sisäisen lämmön muodostuminen. Tuuletusta ei saa estää peittämällä laite
esineillä, kuten sanomalehdillä, pöytäliinoilla, verhoilla jne.
ATTENTION! FR
Ne pas ouvrir le couvercle. Aucune pièce interne réparable par l’utilisateur. Confier la
réparation a du personnel de réparation qualifié
Ne pas laisser l’appareil à proximité d’une source de chaleur telle qu’un radiateur,
dans un endroit directement exposé aux rayons du soleil, trop poussiéreux, ou
pouvant subir des chocs mécaniques
L’appareil ne doit pas être exposé aux gouttes d’eau et aux éclaboussures, et aucun
objet rempli de liquide, tel qu’un vase, ne doit être posé dessus
Ne placer aucune source de flamme nue, telle qu’une bougie allumée, sur l’appareil
Assurer une circulation d’air suffisante et éviter d’obstruer les fentes (le cas échéant)
afin d’éviter une surchauffe interne. La ventilation ne doit pas être bloquée en
couvrant l’appareil avec des objets tels que des journaux, des nappes, des rideaux,
etc.
WARNUNG! DE
Öffnen Sie nicht das Gehäuse. Im Inneren befinden sich keine vom Benutzer zu
wartenden Teile. Überlassen Sie Wartungsarbeiten qualifiziertem Fachpersonal.
Stellen Sie das Produkt nicht an einen Ort in der Nähe einer Wärmequelle wie etwa
eines Heizkörpers oder in einem Bereich mit direktem Sonnenlicht, übermäßigem
Staub, mechanischen Vibrationen oder Stößen.
Schützen Sie das Produkt vor tropfenden oder spritzenden Flüssigkeiten, und stellen
Sie keine mit Flüssigkeiten gefüllten Gegenstände wie Vasen auf das Produkt.
Offene Feuerquellen wie Kerzen dürfen nicht auf dem Gerät abgestellt werden.
Sorgen Sie für eine ausreichende Luftzirkulation und vermeiden Sie, dass
die Lüftungsschlitze (falls vorhanden) abgedeckt werden, um einen internen
Wärmestau zu verhindern. Die Belüftung darf nicht durch Abdecken des Gerätes mit
Gegenständen wie Zeitungen, Tischdecken, Vorhängen usw. blockiert werden.
AVVERTIMENTO! IT
Non aprire il coperchio. Se fosse necessario, riferirsi ad un esperto.
Non esporre il prodotto a fonti di calore, luce del sole diretta, polvere, vibrazioni
meccaniche o altri possibili shock. Non esporre il prodotto a perdite di liquido o a
spruzzi. Non appoggiare nessun oggetto contenente acqua sul prodotto. Non esporre
il prodotto a fuoco, candele o oggetti simili. Assicurarsi la circolazione dell’aria e non
ostruire le ventole, se presenti, per evitare il surriscaldamento. La ventilazione non
deve subire impedimenti dovuti a giornali, tovaglie, tende, ecc.
ADVARSEL! NO
Ikke åpne dekselet. Inneholder ingen deler som kan brukes. Overlat reperasjon til
kvalifisert servicepersonell. Ikke plasser produktet i nærheten av varmekilder som
f.eks. en radiator, eller i områder som er utsatt for direkte sollys, mye støv, mekanisk
vibrasjon eller støt. Produktet må ikke utsettes for drypping eller spruting, og
gjenstander som er fylt med væsker, som f.eks. vaser, skal ikke plasseres på produktet.
Åpne flammer, som f.eks. tente lys, bør ikke plasseres på produktet.
Tillat tilstrekkelig luftsirkulasjon og unngå å blokkere ventiler (hvis tilstede) for å
forhindre intern varmeoppsamling. Pass på at ventilasjon ikke hindres ved å unngå å
dekke apparatet med ting som aviser, bordduker, gardiner osv.
OSTRZEŻENIE! PL
Nie otwierać pokrywy. W środku nie ma części nadających się do naprawy przez
użytkownika. Prosimy pozostawić serwis dla wyszkolonego personelu.
Nie umieszczać produktu w pobliżu źródła ciepła, np. grzejnika, lub w bezpośrednim
świetle słonecznym, kurzu, czy mechanicznym wibracjom. Produkt ten nie może
być eksponowanyna kapanie lub chlapanie, aprzedmioty wypełnione płynami,
takie jak wazy, nie powinny być na nim umieszczane. Źródła otwartego ognia, takie
jak np. świece, nie powinny być umiejscowiane na produkcie. Należy zapewnić
odpowiednią wentylację i unikaćblokowania otworów wentylacyjnych, aby uniknąć
wewnętrznegowzrostu temperatury.Wentylacja nie powinna być utrudniana poprzez
nakrywanie urządzenia gazetami, obrusami czy zasłonami.
ATENÇÃO! PT
Não abra a tampa. Não tente a reparação do instrumento por si. Dirija-se a pessoal
qualificado. Não aproxime a uma fonte de calor excessivo ou exponha o produto à
luz solar, poeira, vibração ou choque. Não mantenha o produto num local húmido
ou perto líquidos como vasos, etc. Não aproxime o produto a fontes de fogo vivo,
como velas. Mantenha o produto num espaço suficientemente arejado de forma a
evitar sobre-aquecimento. Não bloqueie a ventilação do instrumento, cobrindo-o com
artigos como cortinas, toalhas de mesa ou jornais.
VÝSTRAHA! SK
Neotvárajte kryt. Vo vnútri nie sú žiadne súčasti, ktoré sú opraviteľné užívateľom. S
požiadavkou na servis sa obráťte na kvalifikované servisné stredisko.
Nevystavujte produkt do blízkosti akéhokoľvek tepelného zdroja ako napr. radiátora,
alebo do kontaktu so slnečným žiarením, nadmerným prašným prostredím,
mechanickým vibráciám alebo šokom. Produkt nesmie prísť do kontaktu s vodou a
žiadny objekt naplnený vodou, ako napr. váza, nesmie byť umiestnený na produkt.
Žiadne výrobky s otvoreným ohňom, ako napr. sviečky, by nemali byť umiestnené na
produkt. Umožnite dostatočnú cirkuláciu vzduchu a zabráňte obštrukcii ventilačných
otvorov (ak sú prítomné) kvôli prevencii vnútorného prehrievania. Ventilácia nesmie
byť narušená prekrytím zariadenia výrobkami ako napr. noviny, kuchynské utierky,
záclony a pod.
OPOZORILO! SI
Ne odpirajte pokrova. V notranjosti ni nobenih delov, ki jih uporabnik lahko sam
popravlja. Popravilo prepustite usposobljenemu osobju
Ne postavljajte izdelka na lokacijo v bližini vira toplote, kot je radiator, ali na območje,
ki je izpostavljeno neposredni sončni svetlobi, pretiranem prahu, mehanskim
tresljajem ali udarcem
Izdelek ne sme biti izpostavljen kapljanju ali brizganju in nobeni predmeti, napolnjeni
z vodo, kot so vaze, se ne smejo postaviti na izdelek
Nobenega od virov odprtega ognja, kot so vžgane sveče, se ne sme postavljati na
izdelek
Zagotovite zadostno kroženje zraka in umaknite ovire na odprtinah (če obstajajo),
zaradi preprečevanja kopičenja notranje toplote. Ventilacijo se ne sme ovirati s
prekrivanjem naprave s predmeti, kot so časopisi, prti, zavese itn.
¡ADVERTENCIA! ES
No abra la tapa. No intente reparar el aparato usted mismo.  Llévelo a reparar por
personal calificado.
No coloque el aparato cerca de fuentes de calor excesivo o donde esté expuesto a luz
solar directa, golpes, vibraciones o polvo.
Evite lugares expuestos a humedad. No ponga objetos llenos de líquidos en la
superficie de este aparato.
No se deben colocar fuentes de llama desnuda, como velas encendidas, en la
superficie de este aparato.
Mantenga suficiente espacio alrededor del aparato para permitir una ventilación
adecuada. No obstruya o tape las aberturas con objetos como periódicos, manteles,
cortinas, etc.
VARNING! SE
Öppna ej locket. Inga användarvänliga delar inuti. För reparationer vänd er till
kvalificerad servicepersonal
Ställ ej produkten vid en värmekälla t.ex element, i direkt solljus, damm, elektronisk
vibration eller shock.
Produkten bör ej bli utsatt för droppande eller stänk och inga objekt fyllda med
vätskor som t.ex vaser skall ställas på produkten.
Ingen källa till öppna flammor som t.ex tända ljus bör placeras på produkten.
Tillåt tillräcklig luftcirkulation och blockera ej eventuella ventiler för att undvika intern
överhettning. Ventilen bör ej täckas av föremål såsom tidningar, dukar, gardiner etc.

3
INTRODUCTION
Thank you for purchasing the SubZero ZA120 /
ZA240 Amplifier.
To ensure you get the most from your new product,
please read this manual carefully.
FEATURES - ZA120
• 100V and COM outputs for powering ceiling/wall
speakers.
• Single speaker output suitable for 8ohm speakers.
• Two balanced XLR inputs.
• Two jack/line inputs.
• Two stereo RCA outputs.
• Built-In media player with Bluetooth connectivity
plus USB and SD card ports.
FEATURES - ZA240
• Four zoned 100V and COM outputs for powering
up to four speaker zones.
• Single speaker output suitable for 8ohm speakers.
• Two balanced XLR inputs.
• Two jack/line inputs.
• Two stereo RCA inputs.
• Built-In media player with Bluetooth connectivity
plus USB and SD card ports.
BOX CONTENTS
• SubZero ZA120 / ZA240
• UK Power Cable
• EU Power Cable
• User Manual

4
SZ-ZA240 100V LINE ZONE AMPLIFIER
REP EATFOLDERMODE
0
–5
–10
–15
–20
ON
MASTER
MIC 1
IRSD
100
MIC 2
100
MIC /LINE 1
100
MIC /LINE 2
100
LINE 3
100
LINE 4 /USB
100
BASS
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ALL
10–10
TREBLE
10–10
OVERVIEW
FRONT PANEL
1. MEDIA PLAYER
Media Player with USB/SD/Bluetooth (see Media
Player section below).
2. MIC 1
Increases or decreases the volume of MIC 1
input.
3. MIC 2
Increases or decreases the volume of MIC 2
input.
4. MIC / LINE 1
Increases or decreases the volume of MIC / LINE
1 inputs.
5. MIC / LINE 2
Increases or decreases the volume of MIC / LINE
2 inputs.
6. LINE 3
Increases or decreases the volume of LINE 3
input.
7. LINE 4 / USB
Increases or decreases the volume of LINE 4 /
USB input.
1 2 3 4 5 6 7 8
13
910 11 12
8. BASS EQ CONTROL
Increases or decreases the amount of the low/
bass frequencies by 10dB.
9. TREBLE EQ CONTROL
Increases or decreases the amount of the high/
treble frequencies by 10dB.
10. MASTER VOLUME CONTROL
Increases or decreases the master output
volume.
11. OUTPUT LEVEL METER
Visual display of the output volume.
12. POWER ON/OFF SWITCH
Turns the amplifier on or off.
13. SPEAKER ZONE SELECTOR BUTTONS
(SZ-ZA240 Only)
Selects which zones are active. Pressed in = On,
pressed out = Off.

5
LINE OUT LINE 4 LINE 3 MIC 4 / LINE 2 MIC 3 / LINE 1 MIC 2 MIC 1
MIC 4 / LINE 2 MIC 3 / LINE 1 PHANTOM VOX
MIC
LINE
OFF
ON
ZONE 1 ZONE 2 ZONE 3 ZONE 4
100VEQCOM
24V DC
+ - 100V 100V 100V
DC INPUT SPEAKER OUTPUT
IN- / OUTPUTS
REAR PANEL
14. IEC MAINS INLET & FUSE HOLDER
Connect the supplied power cable here.
15. DC24V POWER TERMINALS
Connect a DC24V power supply here (such as a
battery).
16. COM SPEAKER TERMINAL
Connection for COM line to speakers (see
Connection & Set Up guide below).
17. 8Ω SPEAKER TERMINAL
Connection for 8ohm line to speakers (see
Connection & Set Up guide below).
18. 4 ZONE 100V SPEAKER TERMINALS (ZA240
ONLY)
Connection for 100V line to speakers in to
zones 1 to 4 (see Connection & Set Up guide
below).
19. LINE OUT CONNECTORS (RCA PHONO)
Output connection for linking to further
amplifiers (simulates master output).
20. LINE 4 INPUT (RCA PHONO)
Input for line devices (i.e. CD Players).
14 15 16 17 18 19 20 21 22 23 24 25 26 27
21. LINE 3 INPUT (RCA PHONO)
Input for line devices (i.e. CD Players).
22. MIC/LINE 2 INPUT (6.3MM TS JACK)
Input for line devices (i.e. CD Players) or
dynamic microphone.
23. MIC/LINE 1 INPUT (6.3MM TS JACK)
Input for line devices (i.e. CD Players) or
dynamic microphone.
24. DIP SWITCHES
(See DIP Switches section below).
25. MIC 2 INPUT (BALANCED XLR)
Input for dynamic or condenser microphones
(to provide +24v phantom power to condenser,
see DIP Switches section below).
26. MIC 1 INPUT (BALANCED XLR)
Input for dynamic or condenser microphone
(to provide +48v phantom power to condenser,
see DIP Switches section below).
27. 24V MUTE CONTACTS
Connection for emergency mute function.

6
MEDIA PLAYER
A. MEDIA PLAYER DISPLAY
B. SD CARD SLOT
C. MODE SELECTING -USB/BLUETOOTH/SD
D. PLAY / PAUSE BUTTON
E. FOLDER BUTTON
F. REPEAT MODE SETTING
G. PREVIOUS TRACK OR HOLD FOR VOLUME
DECREASE
H. NEXT TRACK OR HOLD FOR VOLUME
INCREASE
I. USB INPUT
J. REMOTE CONTROL ACCEPTOR
BLUETOOTH
To connect a Bluetooth enabled device to the ZA
series amplifiers, please follow the below steps
(ensure that the amplifier is powered on and within
range):
• Open the Bluetooth settings on the Bluetooth
enabled device.
• Scan for Bluetooth devices and search for
‘SubZero’ in the devices list.
• Select ‘SubZero’. The Bluetooth enabled device
should confirm that it is now connected.
• Play audio from the Bluetooth enabled device,
ensuring that volume is turned up.
• Turn up the CH7/8 / MP3 volume control on the
built-in mixer, ensuring the CH7/8 / MP3 button is
pressed in.
USB/SD PLAYER
When a USB memory stick is inserted into the
USB port (I) or SD card into the SD slot (B), the
USB or SD symbol will show in the display and
any compressed audio files will start to play
automatically.
Turn up the USB/LINE4 volume control on the
amplifier to the required level.
Pressing the REPEAT button will step through the
repeat modes – ONE: repeat current track, RAND:
random, ALL: repeat all.
Pressing the Previous Track button skips backwards
through tracks on the memory device. Press and
hold this button to decrease the playback volume.
Pressing the Next Track button briefly steps
forwards through tracks on the memory device.
Press and hold this button to increase the playback
volume.
Pressing the Play/Pause button will Pause the
current track. Pressing it again will resume playback.
MODE
SD
USB
B C D E F G H I JA

12. MODE
Selects the preferred media device. Pressing
the button will cycle between the USB, SD
and Bluetooth device inputs, starting from the
currently selected device.
7
PICK
SONG
EQ
CH- CH+
MODE
12
1
11
2
10
3
64
5
8
7
9
REMOTE CONTROL FOR
MEDIA PLAYER
1. PLAY/PAUSE
Starts or stops the current track being played
via the digital media player (i.e. USB, SD or
Bluetooth).
2. CHANNEL DECREASE
No function.
3. CHANNEL INCREASE
No function.
4. EQ SETTING
Controls the tone level of the digital media
player.
5. TRACK 0-99
Select a certain track number by pressing either
one, or a combination, of numbers between 0
and 99.
6. VOLUME INCREASE
Increases the master output volume of the
digital media player.
7. VOLUME DECREASE
Decreases the master output volume of the
digital media player.
8. SKIP TRACK FORWARDS
Selects the next track.
9. SKIP TRACK BACKWARDS
Selects the previous track.
10. RANDOM TRACK
Activates the random track setting, whereby the
digital media will play tracks in a random order
from the selected device. To deactivate the
setting, press the button again.
11. REPEAT TRACK
Activates the repeat track setting. Pressing the
button once will cause repetition of the current
track. Pressing the button twice will cause
repetition of all tracks on the selected media
device, in order. Pressing the button a third time
will deactivate the setting.

8
CONNECTION & SETUP
Always ensure the device is powered off and the
volume controls are turned down before inserting
or removing cables.
Connect the rear IEC inlet to the mains using the
supplied power cable. Ensure that the voltage is
correct as indicated on the voltage selector and
that the mains outlet is switched on. Alternatively,
the amplifier can be powered by a 24V battery,
such as a lorry or boat battery, by connecting the
“+” and “-” of the battery to the 24Vdc INPUT on
the rear panel. Please ensure that DC cables can
handle the required current (10A minimum is
recommended)
The ZA series amplifiers have 6 input channels.
MIC 1 and MIC 2 inputs are dedicated microphone
channels. Connect the main announcement
microphones to these channel using a balanced
XLR cable. Connect microphones or line level
devices to the MIC/LINE 1 and MIC/LINE 2 inputs
using 6.3mm (1/4”) jack cables. Please ensure the
correct sensitivity is selected for the type of input
device you are connecting (see DIP Switch section
on page 13). Connect any other line level devices
to the LINE 3 and LINE 4 inputs using RCA Phono
cables.
NOTE:
The ZA series amplifiers have a mono output, and
therefore stereo signals will be summed together.
Further mixer-amplifiers or slave amplifiers can be
connected from the rear LINE OUT sockets, using
an RCA Phono cable. This output carries the full mix
of all channels as produced through the speakers.
SPEAKER OUTPUTS
The ZA series amplifiers can be used either as 100V
line amplifiers or standard low impedance power
amplifiers. Please note these 2 configurations
cannot be used together.

9
100V LINE SYSTEMS
For 100V line systems, connect the amplifier to the
first speaker in the system using double-insulated
speaker wire which has adequate current rating to
handle the total output of the amplifier.
Connect the “100V” output terminal to the positive
(+) connection of the speaker and “COM” output to
the negative (-) connection of the speaker. Connect
further speakers in parallel to the first speaker with
all positive terminals connected and all negative
terminals connected as shown above.
A 100V line speaker system can comprise of
multiple speakers connected in parallel. The
number of speakers you are able to connect to
a single amplifier is dependent on the amplifiers
power rating. For most purposes, it is advised
to connect as many speakers as needed with a
combined wattage of no more than 90% of the
amplifier’s output power rating.
NOTE:
- For the ZA240 the total output power is split
across the 4 zones, dependant on how many
speakers are connected to each zone. It is not
possible to achieve 240W of total power output
for each zone individually.
SPEAKER ZONES (ZA240 ONLY)
The ZA240 has 4 separate terminals for 100V
speakers. The speakers connected to the terminals
labelled ZONE 1/ ZONE 2 / ZONE 3 / ZONE 4 (+)
and COM (-) are controlled by the 4 corresponding
zone switches on the front panel (e.g. a speaker
connected to ZONE 1 and COM will only work if
Zone 1 is selected on the front panel).
The ALL switch enables all zones simultaneously.
AMPLIFIER 120w 20w 20w 20w 20w 20w
LOW IMPEDENCE SPEAKERS
The ZA Series amplifiers also include an output for
a single 8ohm speaker. Connect the “8Ω” terminal
to the positive (+) speaker connection and “COM”
terminal to the negative (-) speaker connection.
Please ensure that the power of the connected
8ohm speaker is equal to the total output power
of the amplifier. For example, for the ZA120, which
features 120w of total output power, an 8ohm
speaker with a output power rating of 120w is
recommended.
NOTE:
- It is important to ensure that the speaker load is
no less than 8Ω and that the power handling of
the speaker is equal to or greater than the output
power of the amplifier.
- DO NOT USE 8Ω and 100V OUTPUTS AT THE
SAME TIME.
AMPLIFIER 120w 120w

10
OPERATION
Once you have completed your connections and
settings, please follow the below steps:
• Turn all the volume controls down to their lowest
setting and turn on the power using the power
On/Off switch.
• Turn the Master volume to 12 o’clock, play a
signal into one of the line inputs, and gradually
increase the volume control for the input channel
until the signal is heard through the speakers.
(Note: If a line input is not available, the built-in
media player can be used).
• Repeat this process as necessary for any other
required inputs.
• The output of the amplifier is represented on the
VU level meter LEDs. Please take care to ensure
the Red ‘0’ LED does not illuminate during use. If
the red LED illuminates during use it may be an
indication of distortion or clipping of the output
signal. If this occurs lower the channel input
volume and master volume as necessary.
• When powering down the amplifier, ensure the
Master volume control is turned all the way down
before using the power On/Off switch to turn off
the amplifier.
CONNECTING A MICROPHONE USING XLR
Once a microphone has been connected to the
MIC 1 or MIC 2 input, make sure it is switched
on and if phantom power is required, ensure
this feature is enabled on the DIP switch (see DIP
Switches section on page 13), then follow the
below steps:
• Turn the Master volume to 12 o’clock, and
gradually increase the MIC 1/MIC 2 input volume
whilst speaking into the microphone until the
required volume level is heard through the
speakers.
NOTE:
The microphone should not be able to pick up
the sound from the speakers, as this can cause
feedback to occur.
• Repeat this process for any other required
microphone connections.
EQ
Using the Bass and Treble EQ controls you can
adjust the tone of the master output.
At the 12 o’clock position, these controls are
applying no effect to the signal.
Rotating either the Bass or Treble control clockwise
will boost the frequencies, whilst moving it
anticlockwise will cut the frequencies.
Adjust these EQ controls to suit the type of audio
being played, or to compensate for the acoustics of
the room.

11
DIP SWITCHES
VOX
When a speaking into a microphone connected to
the MIC1 channel the VOX function will lower the
volume of the input channels by -40dB, and return
them to normal when speaking has stopped.
PHANTOM
Use this switch to provide +24V phantom power to
condenser microphones.
MIC3/LINE1
Use this switch to change the sensitivity of channel
MIC3/LINE1 between MIC and LINE levels.
MIC4/LINE2
Use this switch to change the sensitivity of channel
MIC4/LINE2 between MIC and LINE levels.
Note: Ensure the amplifier is switched off before
making any changes to the DIP switches.
Making any changes when the amplifier is
switched on may cause loud noises which
can damage the speakers
MIC 4 / LINE 2 MIC 3 / LINE 1 PHANTOM VOX
MIC
LINE
OFF
ON

12
SPECIFICATIONS
SZ-ZA120
Power supply ............. 220-240Vac, 50/60Hz
(IEC) or 24Vdc option
(screw terminals)
Output power: RMS........ 120Wrms
Outputs : Speaker ......... 100V/ 8Ω / COM
Output: Line .............. RCA signal output
Inputs .................... 2-Mic XLR, 2 x mic/
line jack, 2 x RCA line,
24V mute contacts
Volume controls ........... Mic1, Mic2, mic/line
(1+2), line3, line4 /
(USB), master
Equalizer: Bass / Treble ..... 120Hz ±10dB / 10kHz
±10dB
Bluetooth version.......... 4.0
Phantom power ........... +24V (MIC 1, MIC2
input
THD. . . . . . . . . . . . . . . . . . . . . . <0.5%
Dimensions ............... 488 x 345 x 100mm
Weight ................... 8.6KG
SZ-ZA240
Power supply ............. 220-240Vac, 50/60Hz
(IEC) or 24Vdc option
(screw terminals)
Output power: RMS........ 240Wrms
Outputs : Speaker ......... 4X100V /8Ω / COM
Output: Line .............. RCA signal output
Inputs .................... 2-Mic XLR, 2 x mic/
line jack, 2 x RCA line,
24V mute contacts
Volume controls ........... Mic1, Mic2, mic/line
(1+2), line3, line4 /
(USB), master
Equalizer: Bass / Treble ..... 120Hz ±10dB / 10kHz
±10dB
Bluetooth version.......... 4.0
Phantom power ........... +24V (MIC 1, MIC2
input
THD. . . . . . . . . . . . . . . . . . . . . . <0.5%
Dimensions ............... 488 x 345 x 100mm
Weight ................... 9.8KG

13

If you have any more questions about this product, please do not hesitate to contact the
Gear4music Customer Service Team on: [phone] or [email protected]
KETTLESTRING LANE | YORK | YO30 4XF | UNITED KINGDOM
METALLVÄGEN 45A | 195 72 ROSERSBERG | STOCKHOLM | SVERIGE
LAHNSTRAßE 27 | 45478 MÜLHEIM AN DER RUHR | DEUTSCHLAND