LX503MK2 - Loudspeaker Audac - Free user manual and instructions

Product Type	Two-way passive loudspeaker
Model	LX503MK2
Brand	Audac
Dimensions (H x W x D)	500 x 320 x 300 mm
Weight	12 kg
Power Handling (RMS)	150 W
Peak Power Handling	300 W
Impedance	8 ohms
Frequency Response	50 Hz - 20 kHz (±3 dB)
Sensitivity (1W/1m)	90 dB
Driver Configuration	1x 12" woofer, 1x 1" tweeter
Enclosure Type	Bass reflex
Input Connectors	Speakon NL4
Grille Material	Steel with black coating
Mounting Options	Floor, pole mount with optional bracket
Safety Features	Overload protection via internal circuit breaker
Maintenance	Wipe with dry cloth; avoid moisture
Spare Parts Availability	Available through authorized service centers
Repairability	Modular design allows driver replacement
General Information	Designed for professional sound reinforcement

Frequently Asked Questions - LX503MK2 Audac

What is the power handling of the Audac LX503MK2?

The LX503MK2 handles 150 W RMS and 300 W peak.

What impedance does the speaker have?

The speaker has an impedance of 8 ohms.

Can I use this speaker outdoors?

It is not weatherproof; use only in dry indoor environments.

What type of connectors does it use?

It uses Speakon NL4 connectors for secure input.

How do I clean the speaker grille?

Use a soft brush or vacuum on low setting; avoid water.

What is the frequency response of the LX503MK2?

The frequency response is 50 Hz to 20 kHz (±3 dB).

Can I mount it on a speaker stand?

Yes, it supports pole mount using an optional bracket.

How heavy is the speaker?

It weighs approximately 12 kg.

What are the dimensions?

Dimensions are 500 x 320 x 300 mm (HxWxD).

Is the LX503MK2 compatible with standard amplifiers?

Yes, it works with any amplifier rated for 8 ohms and 150-300 W.

USER MANUAL LX503MK2 Audac

Safety requirements 6

Caution servicing 7

EC Declaration of Conformity 7

Waste of Electrical and Electronic Equipment (WEEE) 8

Chapter 1: Connections and connectors 9

Connection standards 9

Chapter 2: Overview APC100MK2 11

Front panel APC100MK2 11

Rear panel APC100MK2

Chapter 3: Configuring the APC100MK2 13

Configuration interface 13

Login screen 13

Configuration screen 14

Network settings 15

Password settings 16

Time settings 17

RS232 settings 18

Address settings 19

Factory settings 20

Chapter 4: Using the APC100MK2 21

Chapter 5: Additional information 22

IP Basics 22

Technical specifications 24

Introduction

Active speaker system

The LX503MK2 is a 3-way stereo loudspeaker system consisting of an active and passive unit to be linked with each other. It offers an easy and flexible solution for a wide variation of applications, producing a clear and powerful sound.

The integrated amplifier is capable of delivering a power of 2 x 40 Watt and has line level inputs, allowing direct connection to audio sources such as CD players, DVD players, laptops, MP3 players or many other line level audio sources.

The line input is performed in three different ways, offering convenient connection to any kind of audio source. Unbalanced audio sources can be connected to either the RCA or 3.5mm jack connectors, while balanced sources can be connected to the terminal block connections allowing long signal runs without interference.

A volume potentiometer allows loudness adjustment, while the two-band tone control allows equalization of treble and bass. The operation mode can be switched between mono and stereo.

Magnetical shielding around the loudspeakers ensures a complete immunity against interference and radiation caused by external devices, reducing the hum and noise to an absolute minimum.

The passive loudspeaker is connected to the active one using a terminal block connector while the mains should be fed to an IEC socket located at the back of the speaker.

Both speakers come with a sturdy steel mounting bracket, allowing proper mounting and inclining.

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

NO NAKED FLAME SOURCES, SUCH AS LIGHTED CANDLES, SHOULD BE PLACED ON THE APPARATUS

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 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

THE MAINS PLUG OR APPLIANCE COUPLER IS USED AS THE DISCONNECT DEVICE, SO THE DISCONNECT DEVICE SHALL BE READILY OPERABLE

USE THE APPARATUS ONLY IN MODERATE CLIMATES

White hand gesture with index finger raised (no text or symbols)

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)

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)

Simple line drawing of a trash bin with no text or symbols

WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE)

The WEEE marking indicates that this product should not be disposed with regular household 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.

CAUTION

The symbols shown are internationally recognized symbols that warn about potential hazards of electrical products. The lightning flash with arrow point 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.

Chapter 1

Connections and connectors

CONNECTION STANDARDS

The in- and output connections for AUDAC audio equipment are performed according to international wiring standards for professional audio equipment.

Cinch (RCA):

For unbalanced line input connections

Tip: Signal

Sleeve: Ground

3-Pin Terminal block:

For balanced signal input connections

Illustration of a green electrical connector with multiple pins (no text or symbols)

Left: Signal – (XLR Pin 3)

Center: Signal + (XLR Pin 2)

Right: Ground (XLR Pin 1)

For balanced signal input connections

For unbalanced signal input connections

Chapter 2

Overview LX503MK2

LX503MK2 Rear panel

Description LX503MK2

1) Speaker output:

This two pin EURO terminal block connector should be used to connect the supplied passive loudspeaker. Using other loudspeakers can give bad results and even cause damage to the main unit. Be sure that the polarity of the speakers is correct.

2) On / Off switch:

The main unit can be turned on and off with this power button. When switched on, the green power LED at the bottom of the amplifier unit should illuminate.

3) Power supply socket:

The unit should be connected to the mains circuit by using a standard IEC type power cord. This socket contains a 1A slow blow fuse. To replace the fuse, the fuse compartment has to be flipped out by a screwdriver. Be sure that you don't use a quick blow fuse. This socket doesn't contain a ground pin to avoid ground loops.

4) Heat sink:

When using the LX503MK2 at full power for a long time, the heat sink will warm-up. Make sure there's always some space behind the speaker ensuring a proper airflow. Take care when placing the speaker near other heat sensitive items. Don't touch!

5) Volume control:

This button controls the general volume of the speaker system.

6) Treble control:

This button allows you to increase or decrease the high frequencies. By adding high frequencies, the intelligibility can be improved. In the centre position, the sound is neutral. You can adjust it to the desired level.

7) Bass control:

By adding bass, you can add warmth to your music. Decreasing bass can improve the intelligibility of spoken messages, certainly in reverberant rooms.

The operation mode can be switched between Mono and Stereo mode with this switch. When the speaker is used in Mono mode, the input signal applied to the Left input signal will be fed to the amplifier.

9) Unbalanced line input (RCA):

The sound source such as a CD–player, a DVD player, a tuner, ... can be connected to this unbalanced line input. The applied signal should be a line-level signal. A microphone mixer or preamplifier is required for connecting a microphone.

10) Unbalanced line input (3.5 mm jack):

This Line level stereo input is useful when connecting a computer or a portable source (CD, MP3, ...).

11) Balanced line input:

These inputs can be used when connecting source devices with a balanced output signal. The balanced input connections are performed using three-pin Euro-Terminal block connectors. Balanced signals are less sensitive for interference caused by external devices. For this reason is balanced wiring recommended when using long cable runs between the source device and the speakers, or when installed in areas where a lot of interference occurs.

Chapter 3

Technical specifications

Frequency response 80 Hz – 20 kHz

Sensitivity (1W / 1m) 88 dB

Sound pressure (Max W / 1m) 103 dB

RMS Power 2 x 40 Watt

Drivers	HF		1"	Piezo	tweeter
	MF	1"	Mid	range	tweet
	LF	5	1/4 "	Polypropylene
Construction	Speaker		ABS
	Bracket	Coated	steel

Power supply 230 – 240 V AC / 50 Hz

Connectors Power IEC C14 input connector (1A fused)

Input Unbalanced (RCA & 3.5 mm jack)

Speaker output 2-pin Terminal block Balanced (3-pin Terminal

Controls

2-band Volume

tone control

control

Colors LX503MK2/W White (RAL9003)

LX503MK2/B Black (RAL9005)

Dimension 180 x 244 x 190 mm (excl bracket)

180 x 244 x 220 mm (incl bracket)

Packaging Carton box (pair)

Weight net (pair) 5.4 Kg

Shipping weight / volume 6.2 Kg / 0.027 Cbm

Accessories included Wall mounting bracket set

Mains	power	cable	(1.
Speaker	cable	(3.5	me