Monitor Audio CSS230


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

Hifi Installation

Product price: £299.00
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SKU: CSS230 Categories: ,


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 6 1/2″ 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.

Optional square or premium grille can be used with this model.


Frequency Response (-6 dB)

100 Hz – 30 kHz sealed ‘CP’ (85 Hz – 30 kHz –open back)

Nominal Impedance

8 ohms

Sensitivity (1W@1M)

86 dB

Maximum SPL

103.8 dBA

Power Handling (RMS)

40 Watts – Full range (60 watts with crossover set to 100 Hz @ 12 dB/Octave)

Recommended Amplifier Requirements

10 – 60 W

Drive Unit Complement

3 x 3″ C-CAM cone bass-mid drivers
1 x 19 mm (3/4″) C-CAM Gold Dome tweeter

Crossover Recommendation

100 Hz at a minimum of 12 dB/Octave (24 dB/Octave optimum)


Gold Plated Sprung push terminals – for bare wire connection up to 4 mm(2)

Overall Diameter (Including Grille)

250 mm (913/16“)

Overall Depth (Including Grille)

54 mm (21/8“)

Cut-Out Hole Diameter

211 mm (81/4“)

Mounting Depth

50 mm (2″)

Optional Square Grille – Outer Dimensions

249 x 249 mm (9 3/16“)

Fixing Type

3 position Tri-Grip dog leg fixings

Construction Material

ABS (UL94 rated, RoHS2 Compliant) – Painted steel grille


2.88 kg (6 lb 5 oz)

Pre-Construction Bracket

CB6 Pre-Construction Bracket (Purple)

Sold As

Single Unit

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