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Monitor Audio Radius 90 Black Gloss Speaker Pair-R90BL

Model #: R90BL
Monitor Audio
At a Glance

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.

Available in Store Only

Get to know this product.


  • 4" C-CAM bass driver - Radius features 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 radiating diaphragm and its motor design, introducing larger motor sizes and voice coils for increased excursion, higher power capability and reduced distortion.
  • 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” x 20TPI wall fixing. Use the optional Monitor Audio speaker mount or any standard wall bracket
  • Optional floor-stand with internal (pre-wired) cable management system.
  • This product is now available to use with home theatre design software, The CEDIA Designer.

Additional Specifications

Frequency Response80 Hz — 35 kHz
Sensitivity (1W@1M)83 dB
Nominal Impedance8 ohms
Power Handling (RMS)75 W
System Power Handling (RMS)100 W
Recommended Amplifier Requirements30 — 100 W
Maximum SPL102 dBa
Bass AlignmentBass reflex - Rear ported
Drive Unit Complement1 x 4" (100 mm) C-CAM cone bass/mid driver, 1 x 1" (25 mm) C-CAM Gold Dome tweeter
Cabinet Dimensions (H x W x D)198 x 125 x 140 mm (7 13/16 x 4 15/16 x 5 1/2")
Cabinet Dimensions (Including Grille and Terminals (H x W x D))198 x 125 x 164 mm (7 13/16 x 4 15/16 x 6 7/16")
Cabinet Dimensions (Including Grille and Bracket (H x W x D))198 x 125 x 203 mm (7 13/16 x 4 15/16 x 8")
Pre-Construction BracketOptional - Monitor Audio Speaker Mount (MASM)
Weight2.1 kg (4 lb 10 oz)

Misc. Specs

Color Finish NameBlack Gloss
Manufacturer Warranty5 Year
Rms Power Handling100
Impedance8 ohms
Maximum Power Handling (Watts)100
Number of Speakers2
WarningProposition 65 Warning for California Residents