Name: C4.8T
Rating: 4.7 (23 reviews)

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.

Features

Two-way high performance flush mounting ceiling speaker
4" (100mm) UL94V-0 carbon fibre loaded polypropylene cone bass driver
Very wide dispersion – 180° up to 10kHz
High & low impedance operation – transformer included
Fireproofed rising clamp plug and socket for easy pre-wiring
100dB continuous max SPL @ 1 metre
Steel backcan
Tile rails and C bracket included
UL2043 & UL1480

Applications

Fixed installations in ceiling and walls
Low ceiling environments

C4.8T's 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

Links

User guide Datasheet Measurement Data Settings [v1.9]

Specification

TYPE	Ceiling mounted, two-way vented enclosure
FREQUENCY RESPONSE (5)	100Hz-20kHz ± 3dB -10dB @ 80Hz
DRIVER	4" (100mm) UL94V-0 PP bass driver 0.8" (19mm) dome tweeter
RATED POWER (2)	40W AES, 160W peak
SENSITIVITY (8)	86dB
MAXIMUM SPL (9)	100dB continuous, 106dB peak
NOMINAL IMPEDANCE	16Ω
DISPERSION (-6dB)	180° conical up to 10kHz
CROSSOVER	5kHz passive
ENCLOSURE	Steel backcan
FINISH	Bezel & grille – white UV resistant (Overpaintable) Backcan – zinc plated
PROTECTIVE GRILLE	Perforated steel
CONNECTORS	Rising clamp plug and socket
ACCESSORIES (included)	25W 70/100V line transformer Tile rails C bracket Paint mask Cut-out template
VOLTAGE TAPS	100V – 25W, 12.5W, 6W 70V – 25W, 12.5W, 6W, 3W
DIMENSIONS	(OD) 205mm x (D) 131mm (OD) 8.1ins x (D) 5.1ins
CUT-OUT DIAMETER	178mm (7.01 ins)
WEIGHT	2.6kg (5.7lbs)

Architectural Specs

Martin Audio C4.8T

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.

Technical Drawings & 3D Models