Monitor Audio IA40 3 Channel Dolby Digital Amplifier & SB-4 Passive Soundbar Package (70"+ TV's)

Monitor AudioSKU: IA40-SB4

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If you are looking to seriously enhance your TV sound then the Monitor Audio SB range of soundbars is the way forward!

Traditionally you'd need to use a large AV Receiver to power it, but this isn't always feasible so Monitor Audio have released their Dolby Digital Decoding amplifier that connects via Optical Input and can output a front left, centre and right audio channel.

This is perfect for TV rooms, snugs, kitchen televisions etc where good sound is important, but surround sound may be a bit excessive.


  • Powerful Amplifier Runs Front Left, Centre & Right Channel
  • Optical Input
  • Dolby Digital Decoding
  • Subwoofer Output (subwoofer sold separately)
  • Control Volume With Standard TV Remote
  • Bluetooth Streaming For Music Playback


  • 1 x Monitor Audio IA40-3 Dolby Digital Amplifier
  • 1 x Monitor Audio SB-4 Soundbar
  • 1 x Monitor Audio BSB Soundbar Bracket
  • 1 x Techlink iWires 3m Optical Audio Cable



  • Frequency Response (-3dB): 90Hz – 30kHz
  • Sensitivity (1W@1M): 84dB
  • Nominal Impedance (ohms): 8
  • Power Handling Single - R.M.S. (W): 40
  • System Power Handling - R.M.S. (W): 100 (High pass filter set to 100Hz)
  • Recommended Amp Requirements (W): 30 - 100
  • Recommended High Pass Crossover Frequency: 80 - 120Hz
  • Maximum SPL (dBA): 104 (108.8 all channels driven)
  • Bass Alignment: 3 x Auxiliary Bass Reflex (ABR) Loading
  • Drive Unit Complement: 3 x 4” (100mm)
  • C-CAM cone bass/mid driver: 3 x 1” (25mm) C-CAM gold dome tweeter
  • Cabinet Dimensions (HxWxD): 145 x 1110 x 89mm (511/16 x 4311/16 x 31/2 inch)
  • External Dimensions Inc Bracket (HxWxD): 145 x 1110 x 100mm (511/16 x 4311/16 x 315/16 inch)
  • Weight (lbs): 7.64Kg (16lb 12oz)


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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