AUDAC PRE116 User manual

PRE116/126
User Manual
www.audac.eu

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ADDITIONAL INFORMATION
This manual is put together with much care, and is as complete as could be on the
publication date. However, updates on the specifications, functionality or software may
have occurred since publication. To obtain the latest version of both manual and software,
please visit the Audac website @ www.audac.eu.

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Index
Introduction 5
Precautions 6
Safety requirements 6
Caution servicing 6
EC Declaration of Conformity 6
Waste of Electrical and Electronic Equipment (WEEE) 7
Caution 7
Chapter 1: Pin connections and connectors 9
Connection standards 9
Chapter 2: Front & rear panel 10
Front panel overview 10
Front panel description 10
Rear panel overview 11
Rear panel description 11
Chapter 3: Additional information 13
Technical specifications 13
Notes 15

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Introduction
6-Channel stereo preamplifiers
The PRE1xx series are simple but versatile preamplifiers, offering a multifunctional solution
for installations where multiple voice and music sources need to be mixed to one or two
(only PRE126) output zones. The stereo design with six inputs allows connecting any type
of audio source such as microphones, portable devices with Bluetooth and various balanced
or unbalanced line level audio sources.
Channels one and two are balanced inputs, allowing connection of microphone and line level
audio sources. They feature 3-band tone control, phantom power and talk over for priority
announcements. The other inputs are one balanced and three unbalanced stereo line inputs
allowing connection of any line level audio sources.
An integrated Bluetooth receiver and a front panel 3.5mm jack offers convenient wired
or wireless connection possibilities for mobile and portable devices including laptops,
smartphones and tablets.
A master volume control for the output(s) including 2-band tone control and LED VU bar is
located on the front panel, also accommodating each inputs mixing dial. On the back of the
preamplifier is a priority mute contact that suppresses all (non-priority) music sources in
case of contact closure, allowing linking autonomous alarm systems.

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Precautions
READ FOLLOWING INSTRUCTIONS FOR YOUR OWN SAFETY
ALWAYS KEEP THESE INSTRUCTIONS. NEVER THROW THEM AWAY
ALWAYS HANDLE THIS UNIT WITH CARE
HEED ALL WARNINGS
FOLLOW ALL INSTRUCTIONS
NEVER EXPOSE THIS EQUIPMENT TO RAIN, MOISTURE, ANY DRIPPING OR SPLASHING
LIQUID. AND NEVER PLACE AN OBJECT FILLED WITH LIQUID ON TOP OF THIS DEVICE.
DO NOT PLACE THIS UNIT IN AN ENCLOSED ENVIRONMENT SUCH AS A BOOKSHELF
OR CLOSET. ENSURE THERE IS ADEQUATE VENTILATION TO COOL THE UNIT. DO NOT
BLOCK THE VENTILATION OPENINGS.
DO NOT STICK ANY OBJECTS THROUGH THE VENTILATION OPENINGS.
DO NOT INSTALL THIS UNIT NEAR ANY HEAT SOURCES SUCH AS RADIATORS OR
OTHER APPARATUS THAT PRODUCE HEAT
DO NOT PLACE THIS UNIT IN ENVIRONMENTS WHICH CONTAIN HIGH LEVELS OF DUST,
HEAT, MOISTURE OR VIBRATION
THIS UNIT IS DEVELOPED FOR INDOOR USE ONLY. DO NOT USE IT OUTDOORS
PLACE THE UNIT ON A STABLE BASE OR MOUNT IT IN A STABLE RACK
ONLY USE ATTACHMENTS & ACCESSORIES SPECIFIED BY THE MANUFACTURER
UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG
PERIODS OF TIME
ONLY CONNECT THIS UNIT TO A MAINS SOCKET OUTLET WITH PROTECTIVE
EARTHING CONNECTION
THE MAINS PLUG OR APPLIANCE COUPLER IS USED AS THE DISCONNECT DEVICE, SO
THE DISCONNECT DEVICE SHALL BE READILY OPERABLE
EC DECLARATION OF CONFORMITY
This product conforms to all the essential requirements and further
relevant specifications described in following directives: 2014/30/EU
(EMC) and 2014/35/EU (LVD)
CAUTION - SERVICING
This product contains no user serviceable parts. Refer all servicing to
qualified service personnel. Do not perform any servicing (unless you
are qualified to)

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CAUTION
The symbols shown are internationally recognized symbols that warn about potentional
hazards of electrical products. The lightning flash with arrowpoint in an equilateral triangle
means that the unit contains dangerous voltages. The exclamation point in an equilateral
triangle indicates that it is necessary for the user to refer to the users manual.
These symbols warn that there are no user serviceable parts inside the unit. Do not open the
unit. Do not attempt to service the unit yourself. Refer all servicing to qualified personnel.
Opening the chassis for any reason will void the manufacturer’s warranty. Do not get the
unit wet. If liquid is spilled on the unit, shut it off immediately and take it to a dealer for
service. Disconnect the unit during storms to prevent damage.
WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE)
The WEEE marking indicates that this product should not be disposed
with regular houshold waste at the end of its life cycle. This regulation
is created to prevent any possible harm to the environment or human
health.
This product is developed and manufactured with high quality materials
and components which can be recycled and/or reused. Please
dispose this product at your local collection point or recycling centre
for electrical and electronic waste. This will make sure that it will be
recycled on an environmentally friendly manner, and will help to protect
the environment in which we all live.

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Chapter 1
Pin connections and connectors
CONNECTION STANDARDS
The in- and output connections for AUDAC audio equipment are performed corresponding
to international wiring standards for professional audio equipment.
Cinch (RCA):
For unbalanced line input connections
Tip: Signal Sleeve: Ground
White: Left Red: Right
XLR:
For balanced signal input connections
Pin 1: Ground
Pin 2: Signal +
Pin 3: Signal -
3-Pin Terminal Block:
For balanced signal input & link output connections.
Left: Signal - (XLR Pin 3)
Center: Signal + (XLR Pin 2)
Right: Ground (XLR Pin 1)
For balanced line output connections:
For unbalanced line output connections:

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Chapter 2
Front & rear panel
Front panel overview
Front panel description
Input mixing controls:
Using the input mixing controls, the individual level for each input can be adjusted. Each
input control is provided with a clip indicator LED which illuminates when the maximum level
(clipping) is almost reached. To ensure the best signal-to-noise ratio, illumination of this
indicator should only occur at peak levels. When it illuminates frequently, the channel will
be overdriven and a distorted ‘clipping’ sound will occur.
Signal routing selection buttons (only PRE126):
The signal routing buttons located on the right side of each input mixing control (indicated
with ‘Z1’ and ‘Z2’) are used for selection for routing each input to one or both output channels
(only PRE126). Press this button to enable the input routing to the corresponding output. The
corresponding routing indicator LED illuminates when routed.
Bluetooth (CH3):
The integrated Bluetooth receiver is mixed with channel 3, and contains a pairing button
besides the input mixing control. This allows connection of the pre-amplifier with any
supporting audio source device such as smartphone or tablet. The LED positioned on top of
this button indicates the current operation mode. When non illuminating, the device cannot
be discovered by (new) Bluetooth devices. When blinking, the device is not connected but
can be discovered by Bluetooth devices, and when illuminated it is connected and doesn’t
allow pairing with another device.
When pairing with your device for the first time, the ‘PAIR’ button should be pressed and the
LED will start blinking for about 2 minutes. During this period, the device can be discovered
and is indicated as Bluetooth ID ‘AUDAC PRE series’. When both devices have been paired
before, the transmitter will be recognized by the receiver and it will allow continuous pairing
without pressing the ‘PAIR’ button.

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3.5 mm Jack input (CH4):
A 3.5 mm jack input connection is provided on the front panel of the unit besides the channel
4 mixing control. This input is an unbalanced stereo line input, mixed with the rear panel
input of channel 4. Any portable device (such as laptop, smartphone or tablet) with 3.5 mm
jack audio output can be connected to this easy accessible input.
Output master control:
Each output section (only one for PRE116) contains a master volume control, two band tone
control and 6-segment VU LED bar. The master volume control allows regulation of the
overall output level, while two-band tone control allows bass / treble adjustment within a
range of ± 15 dB and the VU LED bar indicates of the overall output level.
Power switch:
Allows to power the system ON and OFF. The blue indicator LED illuminates when switched on.
Rear panel overview
Rear panel description
AC Power inlet with fuse:
The mains power supply (100-240V AC - 50/60 Hz) has to be applied to this AC power
inlet. The connection is made by an IEC C14 power connector and is fitted with a fuse. When
replacing the fuse, make sure that the value of the replacement fuse matches the value of
the original fuse. (T500mAL/250V)
Balanced stereo line output:
The balanced stereo line output(s) is implemented using two 3-pin terminal block output
connectors. The audio signal available on these connectors allows it to be fed to any amplifier.
A mode switch allows to convert the output between stereo and mono. In mono mode, a
summed mono signal will be available on both left & right outputs, allowing the signal be
fed to mono systems such as 100V PA systems.

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Priority mute contact:
A priority mute contact is provided with each output, allowing to completely mute the music
at presence of a contact closure between both terminals. This contact is convenient for
situations where a separate emergency system is installed and complete background music
muting is required at occasion of a (fire) alarm. The emergency system contact outputs can
be connected to this contact input.
Bluetooth antenna connection:
The included Bluetooth antenna should be connected to this terminal for good signal reception.
It is connected using an SMA type connector and allows antenna extension (with an optional
extension cable) for mounting outside of closed rack cabinets.
Unbalanced stereo line inputs:
Unbalanced line level input sources (e.g. media-players, radio tuners, ...) can be connected
to line inputs channel 2 to channel 4. These standard line inputs are implemented using
RCA connectors and fitted with a gain control potentiometer whereby the input sensitivity
can be controlled within a range of +4 dB ~ -20 dB.
NOTE
The gain control potentiometers for channel 3 (mixed with Bluetooth receiver) and channel 4
(mixed with front 3.5 mm jack input) are also affecting the level for these secondary inputs.
Balanced stereo line input:
Balanced line level audio sources can be connected to channel 1 which is implemented using
2 x XLR connectors. It is fitted with a gain control potentiometer whereby the input sensitivity
can be adjusted within a range of +4 dB ~ -20 dB. A mode switch allows to switch the input
between mono and stereo mode and mixes both channels when switched to mono, making
them identically available on both output channels.
Balanced microphone inputs:
Balanced mono sources (e.g. microphones) can be connected to inputs mic 1 and mic 2 which
are implemented using XLR connectors. They are fitted with a gain control potentiometer
whereby the sensitivity can be adjusted within a range of -6 dB ~ -50 dB.
These inputs are fitted with a three-band tone control, allowing signal equalization within
a range of ± 15 dB. A phantom power switch enables 15 Volts phantom power supply for
powering condenser microphones and a talk over switch suppresses (-24 dB) all other audio
sources in that zone.

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Chapter 3
Additional information
Technical specifications
Inputs Mic 1 & 2 Type Balanced microphone
Connector Female XLR
Sensitivity -6 dB ~ -50 dB
Other 3-Band tone control
Phantom power (15V DC)
Talkover
Channel 1 Type Balanced stereo line
Connector Female XLR (2x)
Sensitivity +4 dB ~ -20 dB
Other Mono / Stereo switch
Channel 2 to 4 Type Unbalanced stereo line
Connector Female RCA (2x)
Sensitivity +4 dB ~ -20 dB
Bluetooth Type Integrated Bluetooth receiver
Mixed with Channel 3
Connector Male SMA connector
Other Included antenna
Front line input Type Unbalanced stereo line
Mixed with Channel 4
Connector 3.5 mm stereo jack
Priority mute contact Type Priority mute
4-pin terminal block (2x2) ~ 3.81 mm
Outputs Type Balanced stereo line (2 x for PRE126)
Connector 3-pin terminal block ~ 3.81 pitch
Frequency response 20 Hz - 20 kHz
Signal to Noise ratio > 90 dB
Total Harmonic Distortion + Noise < 0.05%
Crosstalk > 70 dB
Controls Front panel control
Bluetooth receiver Bluetooth spec V4.1
Class 2 output power
Indicators Power
Clip (input & output)
Output VU

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Power supply Type Switching mode
Range 100-240V AC - 50/60 Hz
Power consumption 12 Watt
Dimensions (W x H x D) 482 x 44 x 330 mm
Unit height 1 HE
Weight 4.1 Kg

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Notes

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Notes