Monitor Audio IA40 Bluetooth Amplifier + Radius 90 Bookshelf Speaker System

Monitor AudioSKU: IA40-RADIUS90-BK

Colour: Black
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Monitor Audio are a high end HiFi speaker manufacturer and these Radius 90 speakers won't disappoint!

Perfect for use in kitchens, living rooms etc. where you want high quality sound for music, background audio and even television.

The Monitor Audio IA40-3 amplifier has 60W per channel to power these speakers and lets you easily stream music via Bluetooth.

You can also connect a local television for room-filling sound via the optical audio input. Perfect for kitchens!



  • Bluetooth Streaming
  • Powerful 60W Amplifier
  • Optical Input For TV Connection
  • Subwoofer Output For Extra Bass (Subwoofer sold separately)
  • Wakes Up When You Connect Your Phone



Frequency Response: 80Hz - 35KHz

Sensitivity: 83dB

Nominal Impedance: 8 Ohms

Power Handling Single (RMS): 75 Watts

System Power Handling (RMS): 100 Watts

Recommended Amplifier Requirements: 30-100 Watts

Maximum SPL (dBA): 102

Bass Alignment: Bass reflex - Rear ported

Driver complement: 1 x 4” (100mm) C-CAM® cone bass/mid driver 1 x 1” (25mm) C-CAM gold dome tweeter

Cabinet Dimensions (H x W x D): 198 x 125 x 140mm (713/16 x 415/16 x 51/2 Inches)

Cabinet Dimensions (H x W x D)(Inc Grille & Terminals): 198 x 125 x 164mm (713/16 x 415/16 x 67/16 Inches)

Cabinet Dimensions (H x W x D)(Inc Grille & Bracket): 198 x 125 x 203mm (713/16 x 415/16 x 8 Inches)

Bracket: Optional - Monitor Audio Speaker Mount (MASM)

Weight: 2.1kg (4lb 10oz)



Number of Output Channel: 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 (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: < 0.5W

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


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