Martin Audio C6.8T

Ceiling Series


Designed to offer performance features not normally associated with install ceiling product, the Ceiling Series brings Martin Audio innovation and sound quality to this market sector. Providing smooth articulate sound with high intelligibility this range of products proves that sonic performance need not be sacrificed to meet the requirements of a life safety system.

Consisting of the C4.8T, C6.8T and C8.1T, the Ceiling Series provides solutions for a wide range of installation scenarios. Each loudspeaker is housed in a steel backcan and have been designed in accordance with IEC60849 / EN60849 and are UL2043 and UL1480 certified. With a 16 ohm impedance, the use of multiple units in low impedance systems is greatly simplified. They are also fitted with a high specification transformer enabling power selection for either 70V or 100V operation via a front mounted rotary switch.

From low ceiling corridors to high atriums, the solution is Martin Audio Ceiling Series – high performance, unobtrusive, reliable and easily installed.

Martin Audio C8.T

* Full-range 6.5" system with integral can

* Ceiling mounted, two-way vented enclosure

Featuring a 6.5" (165mm) bass driver and a 0.8" (19mm) dome tweeter, The C6.8T is ideal for flush mounted applications where full frequency performance and wide dispersion are required from a compact, ported enclosure. The side-by-side arrangement of the drive units maintains smooth response up to 75° off-axis and makes the C6.8T perfectly suited for use in low ceilings, where its broad coverage means that fewer units will be required to deliver premium sound over the required listening area. The C6.8T features a 4-point mounting system for ease of installation and a rising clamp plug and socket permit easy pre-wiring with up to 2.5mm2 conductors.

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.




Two-way high performance flush mounting ceiling speaker

6.5" (165mm) UL94V-0 carbon fibre loaded polypropylene cone bass driver

Very wide dispersion – 150° conical up to 7kHz

High & low impedance operation – transformer included

106dB continuous max SPL @ 1 metre

75W power handling – 16 ohm (40W transformer)

Polyswitch and thermal fuse protection

Steel backcan

UL2043 & UL1480


Fixed installations in ceiling and walls

Low ceiling environments

Technical Specification


TYPE Ceiling mounted, two-way vented enclosure


-10dB @ 70Hz

DRIVERS 6.5" (165mm) UL94V-0 PP bass driver

0.8" (19mm) dome tweeter

RATED POWER (2) 75W AES, 300W peak



MAXIMUM SPL (4) 106dB continuous, 112dB peak


DISPERSION (-6dB) 150° conical up to 7kHz

CROSSOVER 4kHz passive

ENCLOSURE Steel backcan

FINISH Bezel & grille – white UV resistant


Backcan – zinc plated

PROTECTIVE GRILLE Perforated steel

CONNECTORS Rising clamp plug and socket

ACCESSORIES (included) 40W 70/100V line transformer

Tile rails

C bracket

Paint mask

Cut-out template


100V – 40W, 20W, 10W

70V – 40W, 20W, 10W, 5W

DIMENSIONS (OD) 260mm x (D) 181mm

(OD) 10.2ins x (D) 7.1ins

CUT-OUT DIAMETER 224mm (8.83 ins)

WEIGHT 3.5kg (7.7lbs)


Architectural Specifications


The loudspeaker shall be a two-way, in-ceiling system consisting of a 6.5” 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 150° conical up to 7kHz. The on-axis frequency response shall be 90Hz-20kHz +/- 3dB and the loudspeaker shall produce a maximum SPL of 112dB peak calculated at 1 metre. Power handling shall be 75W AES, 300W 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 260mm x 181mm (10.2ins x 7.1ins). Weight shall be 3.5kg (7.7lbs).

The loudspeaker shall be the Martin Audio C6.8T.