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Onyx 204 CTW

4" Expandable Column Speaker - IP67

Product at a Glance

The British Acoustics Onyx 204 CTW is a 4" expandable column speaker designed for IP67-rated outdoor and indoor use, delivering 60W continuous (240W peak) power with a 150 Hz–18 kHz response. Its 120° x 30° coverage and 111 dB max SPL ensure focused, intelligible sound in challenging environments. Built with a die-cast aluminium shell and Onyx Terra-Coating, it resists dust, water, and corrosion. Beamforming technology minimises lobing, while V8 extenders allow scalable deployment. Featuring a 100V/70V tap, screw-free terminals, and included wall brackets, the Onyx 204 CTW offers durable, clean, and high-performance sound reinforcement for demanding architectural installations.

CRAFTSMANSHIP

Painstakingly Perfect Production

Over the years, craftsmanship has been closely linked with small scale individualistic production. Back in 1972, we started the same way. As we grew in scale & size, it was difficult to build each speaker individually, but quality control was of utmost importance as so switching to a general assembly line was simply not an option. So we wrote up a code, one quite like enigma, to ensure quality control. We selected the right partners, got the right tools, and in cases where those weren't available, we invented them. We grew slower than most as our aim was to last longer than most.

TECHNICAL SPECIFICATIONS

ACOUSTICAL SPECIFICATIONS

• Freq. Response (-3 dB) : 150 Hz - 18 kHz
• Freq. Range (-10 dB) : 110 Hz - 18 kHz
• Rated Power : 60W AES, 240W Peak
• H Dispersion : 120º
• V Dispersion : 30º
• Nominal Impedance : 8 Ω
• Max Output : Cont 105 dB, Peak 111 dB
• Shielded Screw Terminals

SYSTEM SPECIFICATIONS

• Recommended Subwoofers : See Systems
Chart for compatible subwoofers.
• Recommended System Control : Can be used
without DSP or with the PW-Six DSP for
voicing & tonal benefits
• Recommended Amplifiers : See Amplifier
load calculation chart

LF TRANSDUCER

• 4" Full Range Driver
• 60W AES, 240W Peak
• 1" Copper Voice Coil - Ferrite Magnet
• 4 Driver Column
• Environmental Resistance Coating
• Onyx Terra-Coating for enhanced
resistance against environmental factors
• Precise Beam Forming to combat lobing or
comb filtering, and ensuring a coherent
acoustic centre

HOUSING

• Die-Cast, Coated Aluminum Shell
• Matte Black Paint
• Perforated Stainless Steel Grills
• Hidden Screw Terminals
• V8 Pole Coupling to make the column
longer
• No Handles, Ridges on body for easy lifting
• Screw inserts for Wall Brackets

AESTHETIC
SPECIFICATIONS

• British Acoustics Signature Matte Black Tone
• Non Reflective, Matte Black Grills

OPERATING PARAMETERS

• Operating Positions : Must be deployed
vertically, and with the original V8 column
extenders in case of a longer column unit
• Maximum permitted ambient temperature
(Ta max) 55° C (124° F)
• Minimum permitted ambient temperature
(Ta min): -20° C (-4° F)

IP SPECIFICATIONS

• IP 67 - Offers resistance against dust, water
& corrosion

OPTIONAL ACCESSORIES

• See system chart for the System Accessories

SIZE

• Carton Size
583 x 278 x 278 mm (H x W x D)
23 x 10.9 x 10.9 inch (H x W x D)
• Gross Weight : 11.55 Kgs / 25.47 Lbs
• Packed : Individually

WEIGHT

• Net : 11 Kgs
• Net : 24.25 Lbs

SHIPPING INFORMATION