Martin Audio C4.8T Bedienungsanleitung

The Martin Experience

C4.8T, C.6.8T, C8.1T

User’s Guide

Installation Guide

Martin Audio Ceiling Loudspeakers C4.8T, C6.8T, C8.1T

Description

Martin Audio C4.8T, C6.8T and C8.1T ceiling loudspeakers are all 2-way designs using

soft dome tweeters for the widest dispersion and excellent off-axis performance. All

models have perforated steel grilles, UL94 V-0 baffle materials, steel back cans and

feature rising clamp connectors that accept up to 2.5sqm conductors.

Unpacking

Thank you for purchasing a Martin Audio ceiling loudspeaker system. Every Martin

Audio product is built to the highest standard and thoroughly inspected before it leaves

the factory. After unpacking, examine the product carefully. Inform your dealer if transit

damage is found. We suggest that you retain the original packaging so that the system

can be repacked at a future date if necessary. Martin Audio and its distributors cannot

accept responsibility for product damaged through the use of non-approved packaging.

Compliance

These products conform to:

EMC Directive 89/336/EEC

Low Voltage Directive 73/23/EEC

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 Signaling Speakers.

SUITABLE FOR USE IN AIR HANDLING SPACES

See page 3 for recommended ceiling hole sizes >>

A steel cover plate with a clamped cable entry protects the input

connector against fire in accordance with BS5839: Part 8, Section

10.3.

All models are fitted with a thermal fuse to prevent the loudspeaker

from short circuiting and disabling other loudspeakers in its group

under the influence of fire.

Model Drivers Dispersion

C4.8T 4” (100mm) LF 180deg

0.75” (19mm) HF

C6.8T 6.5”(165mm) LF 150deg

0.75” (19mm) HF

C8.1T 8”(200mm) LF 90deg

1” (25mm) HF

The exceptionally wide mid-high dispersion of the Martin Audio

C4.8T and C6.8T makes them particularly suitable for low ceilings.

Voltage & power settings

All models are 16ohms direct or via line transformers selected with a

baffle-mounted switch for 100V or 70V operation as follows:

Baffle switch Baffle switch location

(C6.8T shown)

Model 16ohm 100V operation 70V operation

C4.8T 40W 25W, 12.5W, 6W 25W, 12.5W, 6W, 3W

C6.8T 75W 40W, 20W, 10W 40W, 20W, 10W, 5W

C8.1T 125W 60W, 30W, 15W 60W, 30W, 15W, 7.5W

Note that all models are protected with a PTC (positive temperature coefficient) device and

will quieten, if overdriven. The PTC device will reset itself once the signal is reduced to a

more sensible level.

Installation

Ceiling loudspeaker with C-bracket

and tile rails (foreground)

Please note carefully

Martin Audio ceiling loudspeakers must be installed by experienced ceiling

loudspeaker installation personnel using the full installation kit provided

The installer must check with all relevant local, national and international electrical,

fire and building safety authorities to ensure that all regulations are being complied

with

Every ceiling loudspeaker must be fitted with a steel safety wire between its rear

can safety tag and a suitable overhead supporting structure to provide backup

support in the event of ceiling damage

When installed in an air handling space the steel cover platesmust be sealed

to the loudspeaker back canswith firestop putty or a suitable alternative to ensure

plenum tight enclosure of the electrical connections

Step 1

Cut the ceiling hole as follows using the template provided:

C4.8T 178mm dia cut-out

C6.8T 224mm dia cut-out

C8.1T 308mm dia cut-out

Suitable hole cutting methods will depend on the ceiling structure,

local conditions, personnel, equipment etc and must be determined

by the installer.

Step 2

Place a tile rail either side of the ceiling hole and clip the C-bracket

over the upright edges of the tile rails.

Note the rail orientations –outwards for the C4.8T and C6.8T,

inwards for the C8.1T.

C4.8T & C6.8T rail orientation C-bracket clipped over rail

(rails placed outwards)

C8.1T rail orientation C-bracket clipped over rail

(rails placedinwards)

Note that the tile rail ends may be reshaped to suit your particular

ceiling structure.

Tile rail end

Step 3

Screw the C-bracket to the tile rails with the screws provided.

C-bracket screwed to tile rail

Step 4

Place the loudspeaker into the ceiling hole (and through the centre of

the C-bracket) from the underside. Align the loudspeaker so that an

imaginary line between the woofer and tweeter runs along the

corridor or concourse. This provides the smoothestsound coverage.

2-way ceiling loudspeaker orientation

Make sure that the C4.8T and C6.8T swivel-tabs do not coincide with

the C-bracket gap.

Loudspeaker in place.

Note swivel-tab positionsbefore fully tightening

It is permissible for one of the five C8.1T swivel-tabs to coincide with

a C-bracket gap in order to maintain driver orientation.

Step 5

Screw the loudspeaker to the C-bracket by tightening the screws

from the underside of the baffle.

Tightening the swivel-tab screws

Step 6

Connect your pre-installed amplifier cable to the ceiling loudspeaker.

Amplifier power input is via a 4-pin rising clamp plug providing

+ and –inputs and + and –Loop Through connections at the top

of the loudspeaker can.

Input & Loop Through connector

The input and loop connectors must be fireproofed using the steel

cover and screws provided. This cover has a 0.75” (19mm) knockout

and a clamped cable entry.

Ceiling loudspeaker rear can

–fireproof steel cover fitted

Step 7

Fit a steel safety wire between its rear can safety tag and a suitable

overhead supporting structure to provide backup support in the event

of ceiling damage.

Safety tag location

Step 8

Push the grille into position ensuring that the grille is properly located

in the baffle slots.

Locate grille tags into slots

Your Martin Audio ceiling loudspeaker is now ready for use.

Warranty

Martin Audio ceiling loudspeaker products are warranted against

manufacturing defects in materials or craftsmanship over a period of

5 years from the date of original purchase.

During the warranty period Martin Audio will, at its discretion, either

repair or replace products which prove to be defective provided that

the product is returned in its original packaging, shipping prepaid, to

an authorised Martin Audio service agent or distributor.

Martin Audio Ltd. cannot be held responsible for defects caused by

unauthorised modifications, improper use, negligence, exposure to

inclement weather conditions, act of God or accident, or any use of

this product that is not in accordance with the instructions provided

by Martin Audio. Martin Audio is not liable for consequential

damages.

This warranty is exclusive and no other warranty is expressed or

implied. This warranty does not affect your statutory rights.

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