Monitor Audio IA40-3 User manual

Amplifier
Owners Manual

Contents
monitoraudio.com 1
ENGLISH
Front and Rear Panel Layout 2
Status LED Guide 3
Setting Up the IA40-3 3
Standby and Sleep Settings 3
Dip Switch Settings 3
Remote Control Code Learning 3
Pairing with a Bluetooth Device 4
Fitting the Mounting Bracket 4
Mounting Examples 4
RS232 5
RS232 Wiring Configuration 5
RS232 Communication Set-Up Parameters 5
Command Protocol 5
Command List 5
Warranty 5
Owner Information 6
Specifications 6
FCC & IC Radiation Exposure Statement 7

1. Power Input
Connect the supplied power supply output
lead here. Use ONLY the appropriate IEC
mains lead and power supply provided with
the product.
2. External IR
Connect the supplied IR Receiver. This is used
for learning remote codes and to control the
amplifier. A remote must be paired in order to
enable Bluetooth searching.
3. Sub/ Line Out
Line level output for connecting to an active or
another mono device.
4. RS232
For use with home automation systems
and uses a block connector for the wiring
configuration and set up protocol.
5. Speaker Output
Accepts up to 12 gauge cable for connecting
speakers.
6. Antenna
Comes unattached from the unit and should
be connected to the IA40-3 for Bluetooth.
To fit the antennae simply tighten it onto the
threaded input on the amplifier.
7. EQ and Input Dip Switches
Two position switches for selecting between
options listed above and below the switches.
8. Optical Input
Used to connect digital optical audio source to
the IA40-3 using a SPDIF connector.
9. Analogue Input
Used to connect an analogue stereo audio
source to the IA40-3 using a 3.5mm stereo
mini jack connector.
10. Status LED
Will light up different colours static or flashing
to indicate different operations, refer to the
next page for more information.
11. Multi-Function Encoder
Controls volume up and down via rotation,
power control and configuration as well as
Bluetooth and Remote pairing.
IA40-3 Manual2
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Front and Rear Panel Layout
6

Status LED Guide
Standby/ Sleep: Red
Power On/ No Signal: White
Analogue/ PCM: Green
Dolby: Purple
Bluetooth Connected: Blue
Bluetooth Pairing: White Blinking
IR Learning Mode: Purple Blinking
Time-out to Sleep Selected: Blue Blinking
Time-out to Standby Selected: Green Blinking
Setting Up the IA40-3
Standby and Sleep Settings
There are two modes the IA40-3 can operate when the Status LED is illuminated red, Standby or Sleep
mode. In Standby mode the IA40-3 can only be turned on by pressing the Multi-Function Encoder or
through RS232 control. Setting the IA40-3 in the sleep mode enables auto-on input signal sensing and will
turn the IA40-3 'On' when there is a signal present and will automatically turn 'Off' when there is no signal
present for 5-7 minutes.
With the amplifier 'Off' (red Status LED) press and hold the Multi-Function Encoder for approximately 10
seconds, or until LED starts blinking blue or green for 3 seconds. If the Status LED blinks blue it is in Sleep
mode. If it blinks green it is in Standby mode. To change the mode simply repeat the above.
Dip Switch Settings
The first switch sets the phono pre-output setting of the amplifier. When the dip
switch in the up position to ‘Sub’ a 120 Hz 2nd order low pass filter is engaged.
When in the downwards position to 'Line' that crossover is disengaged.
There are two EQ settings each with the LOW, MID and HIGH frequency controls. In
the FLAT setting the audio will be played with no changes made to the sound. In the
+3dB setting the frequencies will be boosted by 3dB. LOW is applied at 100 Hz, the
MID at 1.05 kHz, and the HIGH at 8 kHz.
The channel switch should be set in accordance with the number of channels being used. 2 Channel mode
should be used for stereo applications and the 3 channel mode should be used when a centre channel is
introduced, for example when driving a passive soundbar.
The input switch is used for selecting between the wired inputs. The analogue input (up position) uses the
3.5mm wired jack input and the optical input (downwards position) uses the wired SPDIF input.
Remote Control Code Learning
Note: This section must be completed before any Bluetooth devices can be paired.
1. Connect the supplied IR receiver to the External IR port on the amplifier.
2. Connect the 33V AC power adaptor and turn 'On' the unit by pressing the Multi-Function Encoder.
3. Press and hold the Multi-Function Endocder on the unit it starts blinking purple (5 seconds).
4. Point any IR remote control (not supplied) at the IR receiver and press the volume up button 3 times,
the Status LED will blink purple 3 times rapidly.
5. Repeat step 4 with the volume down button. The Status LED will blink purple 3 times rapidly.
6. Repeat step 4 with the mute button. The Status LED will blink purple 3 times rapidly and then turn solid
white. The amplifier is now programmed and will respond to the remote control volume commands.
ENGLISH
monitoraudio.com 3

Pairing with a Bluetooth Device
Note: Bluetooth devices cannot be paired until a remote has been set up with the amplifier,
refer to the 'Remote Control Codes Learning' section.
1. Turn the IA40-3 amplifier 'On' by pressing the Multi-Function Encoder. The Status LED will turn white.
2. Press and hold the mute button on remote control (not supplied) for 3 seconds. The Status LED will
blink white for 1 minute or until paired.
3. Select "IA40-3” in your Bluetooth device settings to pair with the amplifier.
4. Bluetooth will take priority over any wired audio signal when streaming audio. When you stop or pause
Bluetooth audio wired audio will resume playback.
Fitting the Mounting Bracket
The IA40-3 is supplied with 3 mounting brackets, 2 for fitting to the
product and a spare. The brackets are attached using 4 supplied
screws. Fit these through the bracket holes shown into the inserts on the
base of the IA40-3, locations are circled in this illustration.
Mounting Examples
Supplied with the IA40-3 are the options of velcro strips and brackets
for multiple mounting configurations. The bracket can be adjusted to fit most mounting applications by
bending or snapping off the extended segments. You can even introduce an angle for mounting in corners.
Here are some examples of various mounting options.
NOTE: The IA40-3 should always be mounted in an accessible location.
IA40-3 Manual4

monitoraudio.com 5
The power supply can be tucked away elsewhere
or cable tied to the unit.
RS232
The IA40-3 can be controlled via the RS232 port by
sending a string of ASCII commands.
RS232 Wiring Configuration
The RS232 communication socket uses a standard
block connector from a 9 Pin D-Type Socket. This
should be wired as illustrated on the amp panel and
as shown below.
9 Pin D-Type
Socket Pin
Number
TX 3
RX 2
GND 5
RS232 Communication Set-Up
Parameters
Baud Rate: 115200
Data Size: 8
Parity: None
Stop Bits: 1
Handshaking/ Flow Control: None
Command Protocol
Each string of commands sent to the IA40-3
must follow the same structural protocol. These
commands are detailed in the Command List
opposite. To control the IA40-3 using RS232
commands, specific strings of characters must be
sent to the amplifier. Each command string should
be terminated by <CR> (the ASCII carriage return
character, 13 decimal). If using a Terminal Emulator
such as Tera Term just hit the enter key.
Command List
The following ASCII commands control the
operation of the IA40-3:
Amp On AON
Amp Off AOFF
Volume Up 1 Step UV1
Volume Down 1 Step DV1
Volume Up 5 Steps UV5
Volume Down 5 Steps DV5
Mute MUTE 1
Unmute MUTE 0
Get Current Volume GV
Send Volume Setting SV 0-81
Reset RESET
Note: The mute command is followed by
a space then a 0 or 1.
The SV command is followed by a space then
a value in the range of 0-81 to set the volume
level.
All other alphanumeric variables have no
space. Reset sets the amp in sleep mode,
volume at 40 and clears the remote codes.
Warranty
Both the craftsmanship and the performance of this
product is covered by the manufacturer’s warranty
against manufacturing defects provided that the
product was supplied by an authorised Monitor
Audio retailer under the consumer sale agreement.
For the period of cover please refer to the product
page on our website: monitoraudio.com for the
product you have purchased.
When purchasing Monitor Audio products, please
keep your receipt of purchase safe, as this validates
your warranty.
The Bluetooth word mark
and logos are registered
trademarks owned by Bluetooth SIG, Inc.and any
use of such marks by MONITOR AUDIO Ltd. is
under license. Other trademarks and trade names
are those of their respective owners.
Manufactured under
license from Dolby
Laboratories. Dolby, Dolby Audio, and the double-D
symbol are trademarks of Dolby Laboratories.

Owner Information
Product Details
Product Serial No:
Date of Purchase:
Dealer Details
Dealer Name:
Address:
Post code:
E-mail address:
Specifications
IA40-3
Number of Output Channels 3
Power (W / Channel) 4 Ohms @ 1 kHz 60 W @ 1% THD+N for 2 Channel
40 W @ 1% THD+N for 3 Channel
Power (W / Channel) 8 Ohms @ 1 kHz 50 W @ 1% THD+N for 2 Channel
30 W @ 1% THD+N for 3 Channel
Input Impedance 10 k Unbalanced
Output Impedance (Sub/ Line Out) 1.47 kΩ
Input Sensitivity ~300 mV - Full Power
Maximum Input Voltage 2.3 V
Signal to Noise (SNR) > 84 dB Unweighted
Frequency Response (+- 0.5 dB) @ 1 W 10 Hz - 20 kHz
Total Harmonic Distortion
(THD+N @ 1 W, 2ch 8 Ohms, Full Bandwidth) < 0.05 %
Dimensions Excluding Mounting Brackets and
Antenna (H x W x D)
180 x 110.5 x 31.4 mm
71/16 x 43/8 x 11/4 ”
Dimensions Including Mounting Brackets
(H x W x D)
196 x 182.5 x 32.6 mm
711/16 x 73/16 x 15/16 ”
Mains Operating Voltage 100-240 VAC, 50/60 Hz
Fuse Rating (Power Supply) 3 A
Standby Power Consumption < 0.5 W
Weight (Amp + RS232 Terminal Block + Speaker
Terminal Block + Antenna) - No Brackets
0.484 kg
1 lb 2 oz
Bluetooth Yes
Bluetooth Range with Antenna (Line of Sight) > 20 m
Bluetooth Version 4.1
Bluetooth Profiles A2DP, AVRCP
Audio Codec SBC, Apt-X
Monitor Audio reserves the right to alter specifications without notice.
IA40-3 Manual6

FCC & IC Radiation Exposure Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)
This device may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and
Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two
conditions:
1. This device may not cause interference.
2. This device must accept any interference, including interference that may cause undesired operation
of the device.
Changes or modifications not expressly approved by the party responsible for compliance could void the
user's authority to operate the equipment.
NOTE: This equipment 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 residential installation. 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. However, there is no guarantee that interference will not occur in
a particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
To satisfy FCC / IC RF exposure requirements, a separation distance of 20 cm or more should be
maintained between the antenna of this device and persons during device operation. To ensure
compliance, operations at closer than this distance is not recommended.
Limited by local law regulations, version for North America does not have region selection option.
This radio transmitter (5928A-MA439113) has been approved by Innovation, Science and Economic
Development Canada to operate with the antenna types listed below with the maximum permissible gain
and required antenna impedance for each antenna type indicated. Antenna types not included in this list,
having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this
device.
Gain of antenna: 2dBi max.
Type of antenna: 50ohm, Omni-directionnel

Monitor Audio Ltd.
24 Brook Road
Rayleigh, Essex
SS6 7XJ
England
Tel: [phone]
Fax: [phone]
Email: [email protected]
Web: monitoraudio.com
Designed & Engineered in the United Kingdom
Made In China
Version 1. 2019