Intelix AUD-220 Installation Manual

1

AUD-220 Installation Guide

The Intelix AUD-220 is a 2x20 watt Class D amplifier with 8Ω speaker output.
The amplifier features two analog audio inputs and a balanced microphone
input with ducking functions. Additional features of the AUD-220 include input
and microphone volume control, bass and treble adjustments, microphone
mixing with source audio, and three modes of microphone input support (48
dB gain, 48 dB gain with 48V phantom power, and line level). The AUD-220
has three methods of control: push button, RS232, and IR with the optional
AUD-220-IR accessory kit.

L

IR

TX RX

RS232

LINE48V

MIC

MONO

R

1MIC 2

INPUTS

BRIDGESTEREO

2 x 20W @ 4Ω

1 x 40W @ 8Ω

LOOP

24V DC

OUTPUTS

2

Safety Precautions

FCC Statement

To insure the best from the product, please read all instructions carefully before
using the device. Save this manual for further reference.

• Unpack the equipment carefully and save the original box and packing material
for possible future shipment

• Follow basic safety precautions to reduce the risk of fire, electrical shock and
injury to persons.

• Do not dismantle the housing or modify the module. It may result in electrical
shock or burn.

• Using supplies or parts not meeting the products’ specifications may cause
damage, deterioration or malfunction.

• Refer all servicing to qualified service personnel.

• To prevent fire or shock hazard, do not expose the unit to rain, moisture or
install this product near water.

• Do not put any heavy items on the extension cable in case of extrusion.

• Do not remove the housing of the device as opening or removing housing may
expose you to dangerous voltage or other hazards.

• Install the device in a place with fine ventilation to avoid damage caused by
overheat.

• Keep the module away from liquids.

• Spillage into the housing may result in fire, electrical shock, or equipment
damage. If an object or liquid falls or spills on to the housing, unplug the module
immediately.

• Do not twist or pull by force ends of the optical cable. It can cause malfunction.

• Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power
to the device before cleaning.

• Unplug the power cord when left unused for a long period of time.

• Information on disposal for scrapped devices: do not burn or mix with general
household waste, please treat them as normal electrical waste.

This equipment generates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. It has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful interference in
a commercial installation.

Operation of this equipment in a residential area is likely to cause interference, in
which case the user at their own expense will be required to take whatever measures
may be necessary to correct the interference,

Any changes or modifications not expressly approved by the manufacture would
void the user’s authority to operate the equipment.

3

Input and Output Connections

Input Connections

L

IR

TX RX

RS232

LINE48V

MIC

MONO

R

1MIC 2

INPUTS

BRIDGESTEREO

1 2 3

4

5 6 7

1. Output Mode Selector

2. IR Input (requires optional AUD-220-IR)

3. RS232 Input

4. Microphone Input

5. Microphone Level Selector

6. Analog Input 1

7. Analog Input 2

4

Output Connections

A. Power LED
B. 24V DC Power Input
C. Line Level Audio Output
D. 4 Ohm Speaker Outputs

2 x 20W @ 4Ω

1 x 40W @ 8Ω

LOOP

24V DC

OUTPUTS

A DB C

5

Speaker Wiring Configurations

Stereo and Mono Options

Bridged Audio Option

4Ω Load with 4Ω Speakers

+

–

4Ω

+

–

4Ω

2 x 20W @ 4

Ω

1 x 40W @ 8

Ω

LOOP

8Ω Load with 8Ω Speaker

+

–

8Ω

2 x 20W @ 4

Ω

1 x 40W @ 8

Ω

LOOP

4Ω Load with 8Ω Speakers

+

–

+

–

8Ω

8Ω

+

–

+

–

8Ω

8Ω

2 x 20W @ 4

Ω

1 x 40W @ 8

Ω

LOOP

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1. Verify all components included with the amplifier are present before
installation.

2. Turn off power and disconnect the audio/video equipment by following
the manufacturer’s instructions.

3. Connect a quality audio cable between the audio output of the source
device and the appropriate audio input of the AUD-220.

4. Connect a microphone to the microphone input connector.

a. “+” connects to positive

b. “–' connects to negative

c. “╧” connects to ground.

5. Adjust the microphone input model selector based on the type of
microphone to be connected to the AUD-220.

a. 48V – 48dB gain with 48V phantom power

b. MIC – 48dB gain

c. LINE – 4dB gain

6. Connect the speakers to be used in accordance with the Speaker Wiring
Configurations found on page 4.

7. Adjust the audio output mode selector based on the desired output
mode of the AUD-220.

a. STEREO – Stereo audio signals will maintain stereo audio on the

outputs; 20 watts per output.

b. MONO – Stereo audio signals will be summed to dual mono signals

on the outputs; 20 watts per output.

c. BRIDGE – Stereo audio signals will be summed to a single, high

output audio output; 40 watts total output.

8. If the device is to be controlled via IR, plug the IR receiver from the
AUD-220-IR kit into the IR IN port on the input side of the AUD-220.

9. If the device is to be controlled via RS232, plug the 3-pole Euroblock
plug end of the included RS232 cable into the RS232 port on the input
side of the AUD-220.

10. If a second AUD-220 is required, plug a 3.5 mm TRS to 3.5 mm TRS cable
between the LOOP output and Input 2 of the second AUD-220.

11. Plug the power supply into the power input port of the AUD-220.

12. Power on attached audio devices.

Installation Instructions

7

Operation of the Button Controls

Audio Ducking

1

2

INPUT SELECT MUTE

TREBLE

BASS

LINE

MIC

Audio Switching

Volume and EQ Control

The INPUT SELECT button will switch between input 1, RCA analog audio
input, and input 2, 3.5 mm TRS input.

The LEVEL SELECT button will switch between MIC, LINE, BASS, and TREBLE
levels.

When MIC or LINE are selected, the Down, Up, and Mute buttons will adjust
the volume or mute the selected input.

When BASS or TREBLE are selected, the Down and Up buttons will adjust
the bass or treble levels of the analog audio input signal.

Audio ducking is enabled by default. This can be disabled via RS232.

The line level ducking amount may be increased or decreased via RS232. The
default value is 10 steps below the current value.

For example, if the line audio level is at 35, it will drop to 25 while the
microphone is being used. The line level audio will ramp up to the original
value after five seconds of no audio signal being detected on the microphone
input.

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Operation of the IR Remote Controls

INPUTS SEL

MUTE

VOLUME CONTROL

SPEAKER LINE

LINEMIC

TREBLEBASS

MIC

21

+ – + –

+ – + –

INPUTS SEL

MUTE

VOLUME CONTROL

Direct selection of input 1 or input 2.

Direct muting of MIC or LINE inputs. The SPEAKER button unmutes all
sources.

Direct volume and level controls for MIC, LINE, BASS, and TREBLE.

9

RS232 Control

Input Switching

Volume and EQ Settings

Input Muting

RS232 Settings: 9600 baud, 8 Data bits, 1 Stop bit, Parity = None

A carriage return and line feed must follow all RS232 commands. A carriage return
and line feed will follow all responses.

Description Command Response

Switch to input 1

1A1. A: 1 -> 1

Switch to input 2

2A1. A: 2 -> 1

Description Command Response

MIC volume up (XX = volume; 00-60)

601% Volume of MIC: XX

MIC volume down (XX = volume; 00-60)

602% Volume of MIC: XX

Set MIC volume to XX (XX = volume; 00-60)

5XX% Volume of MIC: XX

LINE volume up (XX = volume; 00-60)

603% Volume of LINE: XX

LINE volume down (XX = volume; 00-60)

604% Volume of LINE: XX

Set LINE volume to XX (XX = volume; 00-60)

7XX% Volume of LINE: XX

Bass level up (YY = level; 00-08)

605% Bass of LINE: YY

Bass level down (YY = level; 00-08)

606% Bass of LINE: YY

Set Bass level to YY (YY = level; 00-08)

8YY% Bass of LINE: YY

Treble level up (YY = level; 00-08)

607% Treble of LINE: YY

Treble level down (YY = level; 00-08)

608% Treble of LINE: YY

Set Treble level to YY (YY = level; 00-08)

9YY% Treble of LINE: YY

Description Command Response

Mute MIC and LINE

0A0. Mute

Mute MIC

1A0. Mute MIC

Mute LINE

2A0. Mute LIN

Unmute MIC and LINE

0A1. Unmute

10

Factory Reset

System Query

Description Command Response

Reset to factory defaults

609% Init OK

Description Command Response

Current input and levels

600% A: 1 -> 1

Volume: 30
Bass: 00
Treble: 00

Input Ducking

Description Command Response

LINE ducking amount (XX = volume; 00-60)

5XX% Ducking of LINE: XX

Ducking toggle

610%

Ducking o OR
Ducking on

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I/O Connections

Analog Inputs Two (2) RCA Connectors; One (1) 3.5mm TRS Connector

Microphone Input One (1) 3-Pole/3.5mm Euroblock

Control (Top Panel) Push Button

Control (Input Panel) RS232 via One (1) 3-Pole/3.5mm Euroblock; IR via One (1)

3.5mm TRS Connector

Microphone Signal Type Selector One (1) 3-Position Slider Switch

Output Signal Format Selector One (1) 3-Position Slider Switch

Analog Loop Output One (1) 3-Pole/3.5mm Euroblock

Speaker Output One (1) 4-Pole/3.81mm Euroblock

24V DC Power One (1) Locking Barrel (5.5 mm OD, 2.1 mm ID)

Audio Performance

Input Impedance >10k Ω

Output Impedance 50 Ω Analog Output; 4/8 Ω Speaker Output

Maximum Rated Power Output 40 Watts

Frequency Response 120 Hz to 20 kHz

Common Mode Rejection Ratio (CMRR) >70 dB at 20 Hz to 20 kHz

Signal to Noise Ratio (SNR) 80 dB (Max)

Total Harmonic Distortion + Noise (THD+N) 1% at 1 kHz; 0.3% at 20 kHz at Nominal Level

Voltage Gain 32 dB

Chassis and Environmental

Enclosure Painted Aluminum

Dimensions (H x W x D) 40 mm x 123 mm x 87 mm (1.57 in x 4.84 in x 3.48 in)

Shipping Weight 0.86 kg (1.90 lbs)

Operating Temperature 0° to +40° C (+32° to +104° F)

Operating Humidity 20% to 90%, Non-condensing

Storage Temperature -10° to +60° C (+14° to +140° F)

Storage Humidity 20% to 90%, Non-condensing

Power, ESD, and Regulatory

Minimum Power Consumption 5 watts

Maximum Power Consumption 45 watts

Power Supply Input Voltage 100-240v AC at 50/60 Hz at 0.5 A

Power Supply Output Rating 24V DC at 2 A

ESD Protection 15kV

Device Regulatory CE, RoHS

Power Supply Regulatory CE, RoHS, TUV, UL, SGS

Other

Warranty 2 years

Diagnostic Indicators Input Select LEDs, Signal Select LEDs, Up LED, Down LED,

Mute LED, Power LED

Included Accessories Installation guide, power supply, AC adapters (AU, EU, UK,

and US), RS232 cable, rubber feet

Optional Accessory AUD-220-IR IR kit

Audio quality may be affected by cable grade, cable quality, source and destination equipment, RF and
electrical interference, and cable patches.

Technical Specifications

12

rev 151202

11675 Ridgeline Dr.

Colorado Springs, CO 80921

Toll-Free: 800-530-8998

Fax: [phone]

[e-mail]

www.libav.com

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