Boks Martin Audio Adorn ACS-55T


In stock


As part of the ADORN commercial series, the ACS-55T is a compact, two-way ceiling speaker designed for background and foreground applications that require premium performance and cost competitiveness.


  • High performance two-way ceiling 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 multitap line transformer or 16 ohm low-impedance operation
  • Low and high-frequency overload protection
  • UL94V-0 rated baffle with zinc-plated steel backcan
  • Quick release, bezel-less grille
  • Tile rails and C-ring included
  • 5-year warranty


  • Retail outlets
  • Cafes, bars and restaurants
  • Museums and Houses of Worship
  • Hotels, casinos and concourses
  • Transportation facilities
  • Boardrooms and reception areas
TypeCompact, passive two-way ceiling speaker, ported bass reflex
Frequency Response (1)98Hz-20kHz ± 3dB, -10dB @ 62Hz
DriversLF: 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 AmplifierVIA2004 (for low-impedance operation)
Sensitivity (4)90dB / 1W(4V) / 1m
Maximum SPL (9)113dB peak
Nominal Impedance16 ohms
Dispersion (-6dB)150° conical up to 7kHz
Crossover3kHz passive (LF and HF auto-resetting fuses)
Transformer Taps70V: 30w / 15w / 7.5w / 3.75w 100V: 30w / 15w / 7.5w
Recommended High-Pass Filter65Hz 24dB/oct
EnclosureUL 94V-0 rated ABS baffle with steel backcan
FinishBaffle and grille: RAL9016 white Backcan: zinc plated
GrillePerforated steel, powder-coated, bayonet fitting
ConnectorsCeramic connector (in and link) located behind fire-retardant steel cover
Accessories (included)2 tile rails C-ring backing plate Cut-out template
Dimensions (OD)245mm x (D) Back Can 192mm, (D) Inc. Grille 209mm
(OD) 9.7in x (D) Back Can 7.55in, (D) Inc. Grille 8.23in
Hole Cut-out Dimension222mm (8.74”) diameter
Weight3kg (6.6lbs)
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