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SPECIFICATIONS:

SYSTEM:

POWER HANDLING: 25 watts continuous, 50watts program,

100watts peak

Recommended amplifier: 5-50 watts

Impedance: Selectable 4 or 16 ohms nominal

Frequency response (-10dB): 55Hz-20kHz

Frequency response (+/-3dB): 70Hz-20kHz

Sensitivity: 84dB/1watt/1meter

Max SPL: 104dB

Coverage: 110*90

Directivity (Q): 5.34

Transformer: 30-15-7.5-3.75 watt taps @ 70volt and 30-15-

7.5watts @ 100volt.

TRANSDUCERS:

LF Driver: 4” Cone

HF Driver: 1” Dome tweeter

Crossover Frequency: 2.2kHz

PHYSICAL:

Type: Two way passive ported design

Material: ABS baffle, powder coated aluminium grill, steel

backcan

Connector: Terminal strip

Dimensions (WxD): 252mm (dia) x 219mm

Nett Weight: 2.75kg

ARCHITECTURAL SERIES
DIFFUSE (DUAL) TWO WAY ENCLOSURE

KEY FEATURES:

Two way ported round ceiling loudspeaker with 4” LF, 1” soft dome 

tweeter and passive crossover

50watts program, 100watts peak

Selectable 4ohm or 16ohm low impedance setting. Switch accessible 

from below.

Integral 30/15/7.5/3.75watt tap line transformer

Integral three point mounts swivel out from the loudspeaker to allow 

simple installation from below the ceiling.

Back box, ‘C’ clamp included

Optional mud ring and mounting plate with integral electrical back box 

and conduit knockouts

APPLICATIONS:

Corporate Meeting Rooms

Classrooms

Training Rooms

Restaurants

Retail Outlets

Hotels

Health Clubs

DESCRIPTION:

The QUAD Industrial CONCOURSE C4 is a two way round ceiling speaker  with a 

4” LF, 1” soft dome tweeter and passive crossover. The Concourse C4 is intended 

for small room applications requiring high quality speech reinforcement and/or 

background music.

The CONCOURSE C4 has switch settings for 4 and 16 ohm low impedance, 

allowing efficient use of amplifier power and parallel looping connections with no 

transformer losses or signal degradation.

For distributed applications, the CONCOURSE C4 has an integral transformer 

rated at 30-15-7.5-3.75 watt taps @ 70volts and 30-15-7.5 watt taps @100volts. 

The CONCOURSE C4 includes a back box and ‘C’ ring for weight distribution on 

ceiling finishes. In addition, the C4 has an optional mud ring and ceiling tile 

mounting (with integral terminal box containing conduit knockouts).

All components (including grill) are attached to a steel tether, which in 

turn is attached to an external anchor point.

CONCOURSE C4

Concourse C4 version3  19/3/04  11:01 am  Page 1

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