Ideal for smaller environments, the IA 40-3 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 IA 40-3 can be mounted behind the screen – using the supplied bespoke bracket – to drive a Monitor Audio Passive Sound-bar ( The customizable brackets can be bent to fit and have flexible break-off sections for maximum installation versatility ).

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

If extra bass is required, an active subwoofer can be connected to the IA 40-3 via the sub / line out. Whatever the audio source, this is an amplifier with all the right connections. The IA 40-3 features optical and analogue inputs and the latest Bluetooth® wireless technology, powered by Qualcomm® aptX^TM Audio, to allow easy and superior pairing with mobile devices. The IA 40-3 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 IA 40-3 is Monitor Audio’s versatile solution when superior sound is required in custom install projects.

Monitor Audio IA40 Installation Amplifier User's Manual

Specifications

Number of output channels: 3

Power ( watt / channel ) | 4 ohms | 1k Hz:
60 watt @ 1% THD +N for 2 Channel
40 watt @ 1% THD +N for 3 Channel

Power ( watt / channel ) | 8 ohms | 1k Hz:
50 Watts @ 1% THD +N for 2 Channel
30 Watts @ 1% THD +N for 3 Channel

Input Impedance: 10k Unbalanced

Output Impedance ( sub / line out ): 1.47k

Input sensitivity: ~300 mV - Full Power

Maximum input voltage: 2.3 Volt

Signal to Noise Ratio: > 84 dB unweighted

Frequency Response ( +-0.5 dB ) @ 1 watt: 10 Hz - 20k Hz

Total harmonic distortion THD + N @ 1K Hz: < 0.05%

Dimensions including mounting brackets: ( H x W x D ) 1 ^5/16" x 7 ^11/16" x 7 ^3/16"

Mains Operating Voltage: 100 - 240 VAC, 50 / 60 Hz

Fuse Rating: 3 A

Standby Power Consumption: < 0.5 Watts

Weight: including amp, RS232 terminal block, speaker terminal block & antenna ): 0.484 kg

Bluetooth: Yes

Bluetooth range with antenna ( line of sight ): > 20 meter

Bluetooth Version: 4.1

Bluetooth Profiles: A2DP, AVRCP

Audio Codec: SBC, Apt-X

EQ: The EQ dip switches apply a 3 dB boost at 120 Hz, 1500 Hz, & 8k Hz