Product Details ACS-55T
ACS-55T is an ADORN two-way ceiling loudspeaker for commercial background and foreground music. The design provides speech intelligibility and even coverage in hotels, concourses, shops, restaurants and other architectural spaces.
The 5.25-inch LF driver and 0.75-inch silk-dome tweeter produce a specified maximum of 113 dB peak at one metre. Its reflex-loaded enclosure reaches 62 Hz at the −10 dB point. The deeper back can provides greater internal volume to maximise low-frequency output.
The broad 150° conical pattern supports even coverage with fewer loudspeakers where room geometry permits. This complements the deeper enclosure where extended music reproduction is required.
A rotary switch behind the powder-coated steel grille selects the 70/100 V transformer tap or 16-ohm low-impedance operation. Four or more units can share one amplifier channel where its load rating permits. Independent auto-resetting thermal fuses protect the LF and HF sections.
The UL 94V-0-rated ABS baffle is fitted to a zinc-plated steel back can. Tile rails and a C-ring are included. The bezel-free grille uses a bayonet fitting for removal without tools, with a paintable white RAL9016 finish that matches the on-wall range.
Martin Audio lists UL 1480A, UL 2043 and CSA C22.2 No. 205-17 compliance for ACS-55T.
Explore the Martin Audio ADORN range at B-Star for the available system options.
Technical Specifications ACS-55T
ACOUSTICS |
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| TYPE | Compact passive two-way bass-reflex ceiling loudspeaker |
| FREQUENCY RESPONSE (1) | 98Hz-20kHz ± 3dB -10dB @ 62Hz |
| 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 |
| SENSITIVITY (4) | 90dB / 1W(4V) / 1m |
| MAXIMUM SPL (9) | 113dB peak |
| NOMINAL IMPEDANCE | 16Ω |
| DISPERSION AT −6 dB | 150° conical up to 7kHz |
| CROSSOVER | 3kHz passive (LF and HF auto-resetting fuses) |
TRANSFORMER AND SYSTEM ELECTRONICS |
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| TRANSFORMER TAPS | 70V: 30w / 15w / 7.5w / 3.75w 100V: 30w / 15w / 7.5w |
| RECOMMENDED HIGH-PASS FILTER | 65Hz 24dB/oct |
| RECOMMENDED AMPLIFIER | VIA2004 (for low-impedance operation) |
CONNECTIONS |
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| CONNECTORS | Ceramic connector (in and link) located behind fire-retardant steel cover |
ENCLOSURE, MOUNTING AND ENVIRONMENT |
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| ENCLOSURE | UL 94V-0 rated ABS baffle with steel backcan |
| FINISH | Baffle and grille: RAL9016 white Backcan: zinc plated |
| PROTECTIVE GRILLE | Perforated steel, powder-coated, bayonet fitting |
| INCLUDED ACCESSORIES | 2 tile rails; C-ring backing plate; cut-out template |
| CEILING INSTALLATION SAFETY STANDARDS | Certified compliant: UL 1480A, UL 2043, CSA C22.2 No. 205-17 |
DIMENSIONS AND WEIGHT |
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| 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 |
| CUT-OUT DIMENSIONS | 222mm (8.74”) diameter |
| WEIGHT | 3kg (6.6lbs) |
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