Martin Audio ACS-40TS-W 4-Inch Passive Two-Way Ceiling Speaker, White, Pair

As part of the ADORN commercial loudspeaker series, the ACS-40TS is an ultra-compact, two-way ceiling speaker designed for background and foreground applications that require premium performance and cost competitiveness.

Comprising a 4” (100mm) LF driver and a 0.75” (19mm) silk- dome tweeter, the ACS-40TS produces 108dB peak output at 1 meter and has a high-fidelity sonic character ideal for both music and speech reproduction. Its ported design delivers strong bass that extends down to 73 Hz.

The very wide 180° conical coverage of the ACS-40TS 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 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 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 (RAL9016) to match ADORN on-wall loudspeakers and may also be painted to blend with any décor.

Key Features

• High performance two-way ceiling speaker
• 4” (100mm) LF driver and 0.75” (19mm) HF dome tweeter
• Very wide 180° 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

Technical Specifications

TYPE
Ultra-compact, passive two-way ceiling speaker, ported bass reflex
FREQUENCY RESPONSE (1)
106Hz-20kHz ± 3dB
-10dB @ 73Hz
DRIVERS
LF: 4” /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)
40W AES, 160W peak
RECOMMENDED AMPLIFIER
VIA2004 (for low-impedance operation)
SENSITIVITY (4)
86dB / 1W(4V) / 1m
MAXIMUM SPL (9)
108dB peak
NOMINAL IMPEDANCE
16Ω
DISPERSION (-6DB)
180° conical up to 10kHz
CROSSOVER
3.5 kHz passive (LF and HF auto-resetting fuses)
TRANSFORMER TAPS
70V: 20w / 10w / 5w / 2.5w
100V: 20w / 10w / 5w
RECOMMENDED HIGH-PASS FILTER
75Hz 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) 221mm x (D) Back Can 97mm, (D) Inc. Grille 115mm
(OD) 8.7in x (D) Back Can 3.81in, (D) Inc. Grille 4.51in
HOLE CUT-OUT DIMENSION
197mm (7.75”) diameter
WEIGHT
2.2kg (4.8lbs)