Monitor Audio CI Amp IA40-3


The discreet IA40-3 is a highly versatile amplifier featuring digital, analogue and Bluetooth® inputs. Designed for easy installation, the bespoke fixings allow it to be positioned in multiple locations: on a wall, cabinet, stand or behind a television.

Ideal for smaller environments, the IA40-3 Installation Amplifier will perfectly power in-ceiling speakers in a kitchen, loft room or bedroom. It also works beautifully when paired with Monitor Audio smaller bookshelf speakers in a bedroom, study or sitting room.

Best of all, if there is a television in the setup, the IA40-3 can be mounted behind the screen – using the supplied bespoke bracket – to drive a Monitor Audio Passive Soundbar. (The customisable brackets can be bent to fit and have flexible break-off sections for maximum installation versatility.)

With 40 W of power over three channels at 4 ohms, or 60 W over two channels, the IA40-3 will drive speakers or passive soundbars to deliver a lively and precise sound.

If extra bass is required, an active subwoofer can be connected to the IA40-3 via the sub/line out. Whatever the audio source, this is an amplifier with all the right connections. The IA40-3 features optical and analogue inputs and the latest Bluetooth® wireless technology, powered by Qualcomm® aptXTM Audio, to allow easy and superior pairing with mobile devices. The IA40-3 has been designed to be discreetly tucked away and its unique heatsink fin allows cooling in the tightest of spaces.

Designed for modern living, the IA40-3 is Monitor Audio’s versatile solution when superior sound is required in custom install projects.

Number of Output Channels


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

10k Unbalanced

Output Impedance (Sub/Line Out)


Input Sensitivity

~300 mV - Full Power

Maximum Input Voltage

2.3 V

Signal to Noise (SN:R)

> 84 dB Unweighted

Frequency Response (+-0.5dB) @ 1W

10 Hz – 20 kHz

Total Harmonic Distortion THD + [email protected] KHz

< 0.05%

Dimensions (Excluding Mounting Brackets and Antenna (H x W x D))

31.4 x  180 x 110.5 mm (11/4x 71/16x 43/8")

Dimensions (Including Mounting Brackets (H x W x D))

32.6 x 196 x 182.5 mm (15/16x711/16x 73/16")

Mains Operating Voltage

100-240 VAC, 50/60Hz

Fuse Rating

3 A

Standby Power Consumption

< 0.5 W

Weight (Including Amp, RS232 Terminal Block, Speaker Terminal Block and Antenna)

0.484 kg



Bluetooth Range with Antenna (line of sight)

> 20m

Bluetooth Version


Bluetooth Profiles


Audio Codec

SBC, Apt-X


The EQ dip switches apply a 3 dB boost at 120 Hz, 1500 Hz, and 8 kHz.

Sold As

Single Unit

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Nintronics offers generous trade in prices to help make your next upgrade as seamless as possible, while greatly reducing the overall price of your purchase. Depending upon the items involved, Nintronics will be happy to send out one of our nationwide installation engineers to collect your traded in items and unbox, setup and calibrate your new equipment.

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We offer FREE delivery to the mainland UK (excluding Channel Islands, Isle of Man, Isle of White, Isles of Scilly, and some of the remote Scottish Isles).

For other areas please contact us for a quote. Select items can be delivered internationally by prior agreement. Again please contact us for a quote. We will always do our best to help.

Our aim is to dispatch goods within 2 working days of an order being placed. Please allow 5 working days from the time of your order to receipt of item. If an order is expected to take longer than this our order fulfillment department will contact you to inform you of this.

Where multiple items are ordered, we will dispatch them all in one package. If you have ordered any special or customized items, or items otherwise not immediately available, we will dispatch the order when all items are available. If you have any concerns regarding this, please contact us and we will do are very best to help you.