The ACS-55TS brings full-frequency response, consistent coverage and intelligibility to a wide range of architectural environments — from hotels and concourses to retail outlets, bars and restaurants.

Comprising a 5.25” (100mm) LF driver and a 0.75” (19mm) silk-dome tweeter, the ACS-55TS produces 113dB peak output at 1 metre and has a high-fidelity sonic character ideal for both music and speech reproduction. Its ported design delivers strong bass that extends down to 79Hz.

The wide 150° conical coverage of the ACS-55TS makes it particularly suitable for low ceilings and reduces the number of speakers required for even coverage — leading to a reduction in installation cost. It features a shallow backcan of only 100mm for installation in ceilings with a minimum cavity depth.

It incorporates a high-quality transformer for 70V/100V line operation, with transformer taps selected by a rotary switch accessible behind the powder-coated, perforated steel grille. 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.

Product Features

• Logo-Free Design – Features a clean, unbranded finish with no Martin Audio logo
• Compact two-way ceiling speaker, shallow backcan
• 5.25” (100mm) 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
• UL94V-0 rated baffle with zinc-plated steel backcan
• Quick release, bezel-less grille
• Tile rails and C-ring included
• 5-year warranty
• Replacement grilles available in black, contact our Sales team for more information

Applications

• Retail outlets
• Cafes, bars and restaurants
• Museums and Houses of Worship
• Hotels, casinos and concourses
• Transportation facilities
• Boardrooms and reception areas

Product Specifications

• TYPE: Compact, passive two-way ceiling speaker, ported bass reflex
• FREQUENCY RESPONSE (1): 117Hz-20kHz ± 3dB -10dB @ 79Hz
• DRIVERS:
  • 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): 90dB / 1W(4V) / 1m
• MAXIMUM SPL (9): 113dB peak
• NOMINAL IMPEDANCE: 16Ω
• DISPERSION (-6DB): 150° conical up to 7kHz
• CROSSOVER: 3kHz passive (LF and HF auto-resetting fuses)
• TRANSFORMER TAPS:
  • 70V: 30w / 15w / 7.5w / 3.75w
  • 100V: 30w / 15w / 7.5w
• RECOMMENDED HIGH-PASS FILTER: 65Hz 24dB/oct
• ENCLOSURE: UL 94V-0 rated ABS baffle with steel backcan
• FINISH: Baffle and grille: RAL9016 white Backcan: zinc plated
• GRILLE: Perforated steel, powder-coated, bayonet fitting
• CONNECTORS: Ceramic 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 100mm, (D) Inc. Grille 118mm
  • (OD) 9.7in x (D) Back Can 3.95in, (D) Inc. Grille 4.65in
• WEIGHT: 2.8kg (6.2lbs)