Martin Audio Adorn Series 5.25" Passive Two-way Pendant Ceiling Speaker (Black, Pair) - ACP-55T-B

Martin Audio SKU: ACP-55T
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Sale price$550.00


(Sold as a pair)

ACP-55T-B delivers full-frequency response, consistent coverage, and intelligibility in a wide variety of architectural environments, including hotel atriums and exhibition spaces, as well as retail outlets, bars, and restaurants throughout the world.

Comprising a 5.25” (135mm) LF driver and a 0.75” (19mm) silk-dome tweeter, the ACP-55T produces 109dB peak output at 1 metre and delivers superb sound quality for both music and speech reproduction. Its stylish pendant enclosure is equipped with a single-point mounting system plus provision for attaching a safety cable.

The consistent and wide 150° conical coverage of the ACP-55T reduces the number of speakers required for even coverage — leading to a reduction in installation cost.

It incorporates a high-quality transformer for 70V/100V line operation, with transformer taps selected by a rotary switch at the top of the pendant enclosure. The switch also provides for 16-ohm low impedance operation — enabling four or more speakers to be driven in parallel from a single amplifier channel. For full-bandwidth protection, the low and high- frequency sections are individually protected against overload by auto-resetting thermal fuses.

The grille is bezel-less for a clean look, its bayonet fitting is easy to remove without the use of tools and finished in white or black to match ADORN on-wall loudspeakers and may also be painted to blend with any décor.

  • High performance two-way pendant speaker
  • 5.25” (135mm) LF driver and 0.75” (19mm) HF dome tweeter
  • Wide 150° conical coverage pattern reduces speaker count required for even coverage
  • 70V/100V multi-tap line transformer or 16-ohm low-impedance operation
  • Low and high-frequency overload protection
  • Quick release, bezel-less grille
  • UL94V-0 rated baffle and enclosure
  • 5-year warranty


  • Retail outlets
  • Cafes, bars and restaurants
  • Museums and Houses of Worship
  • Hotels, casinos and concourses
  • Exhibition spaces and convention centres
  • Transportation facilities
TYPE Passive two-way pendant speaker, ported bass reflex
-10dB @ 56Hz
  • LF: 5.25” /1” high-temp voice coil, coated paper cone, rubber surround, ferrite motor, pressed steel chassis
  • HF: 0.75” silk dome, neodymium motor
RATED POWER (2) 50W AES, 200W peak
RECOMMENDED AMPLIFIER VIA2004 (for low-impedance operation)
SENSITIVITY(4) 86dB / 1W(4V) / 1m (full space)
MAXIMUM SPL (9) 109dB peak
DISPERSION (-6dB) 150° conical up to 7kHz
CROSSOVER 3kHz passive (LF and HF auto-resetting fuses
  • 70V: 30w / 15w / 7.5w / 3.75w
  • 100V: 30w / 15w / 7.5w
ENCLOSURE UL 94V-0 rated ABS baffle and enclosure
FINISH Black or white
GRILLE Perforated steel, powder-coated, bayonet fitting
CONNECTORS Ceramic connector (in and link)
  • (OD) 246mm x (D) 238mm
  • (OD) 9.7in x (D) 9.35in
WEIGHT 3.46kg (7.62lbs)

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