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Type: IA40-3

  • Monitor Audio small 3 channel 40 Watt amp

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 3
  • Power (W / Channel) | 4 ohms | 1 kHz 60W @ 1% THD+N for 2 Channel/ 40W @ 1% THD+N for 3 Channel
  • Power (W / Channel) | 8 ohms | 1 kHz 50W @ 1% THD+N for 2 Channel/ 30W @ 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 2.3V
  • Signal to Noise (SN:R) > 84 dB Unweighted
  • Frequency Response (+-0.5dB) @ 1W 10 Hz - 20 kHz
  • Total Harmonic Distortion THD + N@1 KHz < 0.05%
  • Dimensions Excluding Mounting Brackets and Antenna (H x W x D) 31.4 x 180 x 110.5 mm
  • Dimensions Including Mounting Brackets (H x W x D) 32.6 x 196 x 182.5 mm
  • Mains Operating Voltage 100-240 VAC, 50/60Hz
  • Fuse Rating 3A
  • Standby Power Consumption < 0.5W
  • Weight (Including Amp, RS232 Terminal Block, Speaker Terminal Block and Antenna) 0.484 kg
  • Bluetooth Yes
  • Bluetooth Range with Antenna (line of sight) > 20m
  • Bluetooth Version 4.1
  • Bluetooth Profiles A2DP, AVRCP
  • Audio Codec SBC, Apt-X