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Monitor Audio Radius 225 4" Centre Speaker

Monitor Audio  |  SKU: RADIUS-225-BL
Colour: High Gloss Black Lacquer


At just 65mm in depth, the Monitor Audio 225 is the perfect match with today’s ultra-thin displays.

Use it as a centre channel or main speaker: its acoustic design of twin 4” C-CAM® mid/bass drivers astride a 1” C-CAM tweeter delivers superb accuracy from horizontal and vertical positions.


  • New 4” C-CAM® bass driver - Radius features all new bass drivers with concave cone profiles, introduced by our top-of-the-range Platinum speakers and applied subsequently to Gold GX. Extensive research and FEA modelling have allowed us to perfect the relationship between the new radiating diaphragm and its motor design, introducing larger motor sizes and voice coils for increased excursion, higher power capability and reduced distortion.
  • New C-CAM gold dome tweeter - optimised to deliver the finest and widest performance within the compact Radius cabinets. It benefits from a more efficient rear-venting design, releasing air trapped and compressed at the back of the tweeter dome, and guiding it around the drive assembly to a rear-loading chamber.
  • HiVe®II port design - Straight from Platinum’s design blueprint, the HiVe reflex port makes its Radius debut. It’s shaped to have the same effect on airflow as a gun-barrel on a bullet. Rifled grooves inside the port help to accelerate the flow and reduce turbulence, so air moves in and out of the port more efficiently, for a faster more dynamic bass response.
  • Single through-bolt driver fixing provides mechanical de-coupling and enhanced mid-band clarity and resolution. The through-bolts also act as rigid cross bracing to give a very solid non-resonant cabinet.
  • Comes complete with a dedicated wall bracket.

Key Features

  • Placement
    Freestanding, Bookshelf
  • Power Handling
    150 W
  • Driver Size
  • Dimensions
    610 x 140 x 77 mm (H x W x D)
  • Warranty
    5 Years


    • Frequency Response: 80Hz - 35KHz
    • Sensitivity: 87dB
    • Nominal Impedance: 6 Ohms
    • Power Handling Single (RMS): 100 Watts
    • System Power Handling (RMS): 150 Watts
    • Recommended Amplifier Requirements: 40-150 Watts
    • Maximum SPL (dBA): 107
    • Bass Alignment: Bass reflex - Front ported
    • Driver complement: 2 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): 610 x 140 x 67mm (24 x 51/2 x 25/8 Inches)
    • Cabinet Dimensions (H x W x D) (Inc Grille & amp; Terminals): 610 x 140 x 77mm (24 x 51/2 x 31/16 Inches)
    • Cabinet Dimensions (H x W x D) (Inc Grille & Bracket): 610 x 140 x 84mm (24 x 51/2 x 35/16 Inches)
    • Bracket Dedicated: bracket included
    • Weight: 4.2kg (9lb 4oz)

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Authorised Dealer

K&B Audio are authorised dealers for Monitor Audio. All sales come with a 5 Years manufacturers warranty and full technical support.

Monitor Audio Radius 225 4" Centre Speaker - K&B Audio
Monitor Audio

Monitor Audio Radius 225 4" Centre Speaker










Drive Type




Noise Cancelling




Music Sources






TV Connection


Smart Features


Cut-Out Diameter


Mounting Depth


Power Handling

150 W



Driver Size





610 x 140 x 77 mm (H x W x D)


5 Years
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