The C4.8T is an extremely compact, two-way flush mount loudspeaker designed to deliver high performance and high intelligibility in a wide range of applications. The unit consists of a 4" (100mm) bass driver with a UL rated, carbon fibre loaded polypropylene cone and a 0.8" (19mm) dome tweeter mounted side by side on the baffle. This configuration easily outperforms coaxial stalk-mounted tweeter or single driver arrangements in terms of wide dispersion and smooth off-axis frequency response. The exceptionally wide dispersion of the C4.8T makes it particularly suitable for installation in low ceilings where significantly fewer units will be required to cover a particular area.
These products comply with UL2043 Fire Tests for Heat & Visible Smoke Release for Discrete Products and their Accessories Installed in Air Handling Spaces.
Listed UL1480 General Signalling Speakers.
SUITABLE FOR USE IN AIR HANDLING SPACES
|TYPE||Ceiling mounted, two-way vented enclosure|
|FREQUENCY RESPONSE (1)||100Hz-20kHz
-10dB @ 80Hz
(100mm) UL94V-0 PP bass driver
0.8" (19mm) dome tweeter
|RATED POWER (2)||40W AES, 160W peak|
|MAXIMUM SPL (4)||100dB continuous, 106dB peak|
|NOMINAL IMPEDANCE||16 ohms|
|DISPERSION (-6dB)||180° conical up to 10kHz|
& grille – white UV resistant
Backcan – zinc plated
|PROTECTIVE GRILLE||Perforated steel|
|CONNECTORS||Rising clamp plug and socket|
70/100V line transformer
100V – 25W, 12.5W, 6W
205mm x (D) 131mm
(OD) 8.1ins x (D) 5.1ins
|CUT-OUT DIAMETER||178mm (7.01 ins)|
The loudspeaker shall be a wide-dispersion, two-way, in-ceiling system consisting of a 4” low frequency transducer and a 0.8” dome high frequency transducer mounted in a ported enclosure. The enclosure shall comprise a pressed steel backcan with a UL94V-0 fire-rated moulded baffle. The transducers shall be protected by a removable, perforated steel grille.
Input connection shall be made via a four-pin rising-clamp plug and socket with loop-through capability to enable pre-wiring with up to 2.5mm2 cable prior to installation. The connector shall be protected from fire by a steel cover with a clamped cable entry. An attachment tag on the backcan shall enable direct attachment to the building structure as a secondary support.
The loudspeaker shall include a steel support ring and tile rails.
Dispersion shall be 180° conical up to 10kHz. The on-axis frequency response shall be 100Hz-20kHz +/- 3dB and the loudspeaker shall produce a maximum SPL of 106dB peak calculated at 1 metre. Power handling shall be 40W AES, 160W peak.
The loudspeaker shall be equipped with a transformer for 70V or 100V line operation, with taps selected by a rotary switch on the front baffle. The switch shall also provide for 16 ohm low impedance operation of the loudspeaker.
Dimensions (OD x D) shall be 205mm x 131mm (8.1ins x 5.1ins). Weight shall be 2.6kg (5.7lbs).
The loudspeaker shall be the Martin Audio C4.8T.