Monitor Audio Speakers RADIUS RAD 90 Black

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For ultra-discreet sound all around the home, or partnered with the Radius 380 sub for explosive stereo, the original hi-fi mini monitor continues to evolve, incorporating a 4” C-CAM® bass driver and 1” C-CAM tweeter.

  • 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.
  • Single point ¼”x20TPI wall fixing. Use the optional Monitor Audio speaker mount or any standard wall bracket
  • Optional floor-stand with internal (pre-wired) cable management system.

Frequency Response

80Hz - 35KHz



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)


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)


Optional - Monitor Audio Speaker Mount (MASM)


2.1kg (4lb 10oz)

Note: Data Colleted in the Manufacturer Web Site

Mon Audio RAD 90 Black
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