Monitor Audio CSS230 Low Profile Ceiling Speaker
Monitor Audio CSS230 Low Profile Ceiling Speaker
6 Inch Ceiling Trimless Grille - New
Monitor Audio CSS230 Low Profile - Angled Grille
Monitor Audio CSS230 Low Profile - Rear
Monitor Audio CSS230 Low Profile - Angled

Monitor Audio CSS230 Low Profile Ceiling Speakers

   Based on 1 review
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Monitor Audio CSS230 Low Profile Ceiling Speakers



  • Frequency Response (-6dB)
    • 100Hz – 30KHz sealed ‘CP’ (85Hz – 30KHz –open back)
  • Impedance (nominal)
  • Sensitivity (1W @ 1M)
    • 86dB
  • Maximum SPL
    • 103.8dBA
  • Power Handling (RMS)
    • 40 Watts – Full range (60 watts with crossover set to 100Hz @ 12dB/Octave)
  • Recommended Amp Requirements
    • 10 - 60w
  • Drive Unit Complement
    • 3 x 3” C-CAM cone bass-mid drivers
    • 1 x 19mm (3/4”) C-CAM Gold Dome tweeter
  • Crossover Recommendation - using an AVR
    • 100Hz at a minimum of 12dB/Octave (24dB/Octave optimum)
  • Connection
    • Gold Plated Sprung push terminals – for bare wire connection up to 4mm(2)
  • Fixing Type
    • 3 position Tri-Grip dog leg fixings
  • Construction Materials
    • ABS (UL94 rated, RoHS2 Compliant) – Painted steel grille
  • Pre-Construction Bracket
    • CB6 (Purple)


  • Overall Diameter (including grille)
    •  250mm (9 13/16”)
  •  Overall Depth (including grille)
    •  250mm (9 13/16”)
  •  Cut Out Diameter
    •  211mm (8 1/4”)
  •  Mounting Depth
    • 50mm (2”)


Monitor Audio CSS230 Low Profile Ceiling Speaker is a brilliantly innovative back-box design with an impressively shallow 50mm (2”) mounting depth, custom built to offer hi-fi levels of performance in spaces where no high quality speaker has gone before.

Between 2” stud frames or where pipework or cabling reduces mounting depth, the hybrid back-box construction and proprietary full-range driver array combine to deliver consistent audio quality with exceptional installation versatility.

The hybrid back-box provides the best of all worlds for installer and customer. Combined, the three proprietary 3” mid-bass units achieve the bass output of a 61/2” driver, all from a super-stealthy flush-fitted profile.

In keeping with Monitor Audio’s renowned design rigour, the crossover comprises high quality film capacitors and low loss inductors - selected for signal integrity - ensuring peerless audio detail and dynamics from a speaker of its size and application. When the CSS230 is in ‘ported’ mode, a fine gauze protects the acoustic system from dust ingress. 


  • Super-slim mounting depth 50mm (2”) designed to fit within 2” stud walls or where space is restricted
  • Hybrid CP ‘Controlled Performance’ style, enclosed or open back-box option provides flexible high performance options and sound isolation in one
  • Driver configuration of three 3” C-CAM bass/mid-range drivers in a radial array around a 19mm C-CAM gold dome tweeter (fixed position) and high quality crossover design offers Monitor Audio’s award-winning signature sound quality
  • Gold plated sprung push terminals are reliable and easy to connect
  • Magnetically attached ‘Trim-less’ round and square grille options for discreet, reliable and easy servicing, flexible in-wall/ceiling installation, paintable to blend with de´cor
  • Patented Tri-Grip dog leg fixings – Reliable, robust and quick to install
  • Existing pre-construction bracket for easier system design and planning

Monitor Audio CSS230 Warranty:
Monitor Audio CSS230 Ceiling Speakers carry a Limited Lifetime Warranty.

We are authorised Monitor Audio retailers. Brand new and complete with the full warranty.

Monitor Audio CSS230 Low Profile Ceiling Speakers Product review

   Rated 5 out of 5 based on 1 review   |   Review this product
Reviewed by:
24 Apr 2019
Super thin speaker, beautifully detailed sound
The two Monitor slimline singles produce a clarity and a directness that I didn't anticipate and work brilliantly in a closed bedroom setting. Detail is excellent picking out quiet lyrics and percussion and presenting them effortlessly. Case size perfect for a shallow 100mm ceiling void.
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