Optimal Audio

Optimal Audio Cuboid 5TX

Two-Way Passive with Transformer

Full range, 5” loudspeaker

The Optimal Audio Cuboid 5TX is a versatile full-range passive loudspeaker with an integrated transformer, designed for use in 70V/100V distributed audio systems. Ideal for retail, hospitality, and commercial spaces, it delivers clear, balanced sound with flexible installation and a sleek, professional design. 

Cuboid 5TX
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Technical Specifications

TYPE
Two-way, full range, passive 5” loudspeaker with transformer
FREQUENCY RESPONSE (when used with preset)
97Hz - 20kHz +/-3dB, -10dB @ 80Hz
DRIVERS
LF: 5.25”(133mm) coated paper, ferrite motor system. HF: 0.75” (19mm) Silk Dome, neodymium motor system
IP RATING
IP54 when used with accessory terminal cover
RATED POWER
50 W (AES) 200W (peak)
NOMINAL IMPEDANCE
SENSITIVITY (1W/1m)
88dB
MAXIMUM SPL @ 1m
105dB (cont) 111dB (peak) @ 8Ω
CROSSOVER
2.5kHz
RECOMMENDED HIGH PASS FILTER
24dB Per Octave @ 70 Hz
TRANSFORMER TAPS @ 70v
2.5, 3.75, 5, 7.5W
TRANSFORMER TAPS @ 100v
5, 7.5, 10, 15W
DISPERSION (-6dB)
130°H x 120°V
ENCLOSURE
ABS
FINISH
Paint
PROTECTIVE GRILLE
Painted Aluminium
CONNECTORS
4 pin Euroblock
PIN CONNECTIONS (INPUT)
Positive and negative in with link out terminals
FITTINGS
M4 mounting points for wall bracket
DIMENSIONS
(W)155mm x (H)255mm x (D)150mm (W)6.1” x (H)10” x (D)5.9”
WEIGHT
2.15kg (4.7lb)
RECOMMENDED SUB
Sub 10
RECOMMENDED AMP
Zone, SmartAmp

Cuboid 5TX is a full range, two way, passive 5” loudspeaker designed to give exceptional sound quality in a very small form factor, for distributed applications with high quality background music and speech reproduction.

With its attractive design and included mounting hardware, Cuboid 5TX can be fixed in either portrait or landscape orientation for simple and flexible installation. A weatherproof terminal cover is available for outdoor use, bringing the rating to IP54.

Cuboid 5TX  features a 5.25” low frequency driver and a 0.75” silk dome high frequency driver mated to a shallow wave guide for consistent HF distribution.

Each Cuboid 5TX can be run on a series of 70 or 100V taps or at low impedance. Tap selection is via a rotary switch on the rear of the cabinet.

For enhanced bass performance, Cuboid 5TX can be teamed with Sub 10, and a SmartApp or powered Zone will provide amplification, optimal sound settings as well as limiters to protect the drivers when playing at louder sound levels.

When coupled with Zone and WebApp, system set up and end user control is straight forward, and can be further supplemented by Zonepad wall controllers.

  • Discreet size, high performance
  • Portrait or landscape mounting options
  • Wall bracket included
  • Max SPL 105dB (continuous) 111dB (peak)
  • 130° horizontal x 120° vertical coverage
  • IP54 for outdoor use with accessory terminal cover
  • 8 ohm or 70/100V line operation


TYPETwo-way, full range, passive 5” loudspeaker with transformer
FREQUENCY RESPONSE (when used with preset)97Hz - 20kHz +/-3dB, -10dB @ 80Hz
DRIVERSLF: 5.25”(133mm) coated paper, ferrite motor system. HF: 0.75” (19mm) Silk Dome, neodymium motor system
IP RATINGIP54 when used with accessory terminal cover
RATED POWER50 W (AES) 200W (peak)
NOMINAL IMPEDANCE
SENSITIVITY (1W/1m)88dB
MAXIMUM SPL @ 1m105dB (cont) 111dB (peak) @ 8Ω
CROSSOVER2.5kHz
RECOMMENDED HIGH PASS FILTER24dB Per Octave @ 70 Hz
TRANSFORMER TAPS @ 70v2.5, 3.75, 5, 7.5W
TRANSFORMER TAPS @ 100v5, 7.5, 10, 15W
DISPERSION (-6dB)130°H x 120°V
ENCLOSUREABS
FINISHPaint
PROTECTIVE GRILLEPainted Aluminium
CONNECTORS4 pin Euroblock
PIN CONNECTIONS (INPUT)Positive and negative in with link out terminals
FITTINGSM4 mounting points for wall bracket
DIMENSIONS(W)155mm x (H)255mm x (D)150mm (W)6.1” x (H)10” x (D)5.9”
WEIGHT2.15kg (4.7lb)
RECOMMENDED SUBSub 10
RECOMMENDED AMPZone, SmartAmp

About Penguin Media Solutions

Penguin Media Solutions is a professional audio, video, and lighting design, installation, and maintenance company based in Brighton, UK. As an authorised Martin Audio dealer, we provide high-performance AV systems for commercial venues, hospitality, and event spaces across Brighton, London, and South-East England.

The Institute of Sound, Communications & Visual Engineers | ISCVE
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