Optimal Audio

Optimal Audio Cuboid 6TX

Two-Way Passive with Transformer

Full-Range 6.5" Loudspeaker

The Optimal Audio Cuboid 6TX is a versatile full-range passive loudspeaker with an integrated transformer, designed for use in 70V/100V distributed audio systems. Ideal for commercial environments such as hospitality, retail, and leisure spaces, it delivers clear, detailed sound with flexible installation and reliable performance. 

Cuboid 6TX
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Technical Specifications

TYPE
Two-way, full range, passive 6.5” loudspeaker with transformer
FREQUENCY RESPONSE (when used with preset )
90Hz - 20kHz +/-3dB, -10dB @ 70Hz
DRIVERS
LF: 6.5”(165mm) coated paper, ferrite motor system, HF: 1” (25.4mm) Silk Dome, neodymium motor system
IP RATING
IP54 when used with accessory terminal cover
RATED POWER
60 W (AES) 240W (peak)
NOMINAL IMPEDANCE
SENSITIVITY (1W/1m)
89dB
MAXIMUM SPL @ 1m
107dB (cont) 113dB (peak) @ 8Ω
CROSSOVER
3.4kHz
RECOMMENDED HIGH PASS FILTER
24dB Per Octave @ 50 Hz
TRANSFORMER TAPS @ 70v
3.75, 7.5, 15, 30W
TRANSFORMER TAPS @ 100v
7.5, 15, 30, 60W
DISPERSION (-6dB)
130°H x 120°V
ENCLOSURE
ABS
FINISH
Black and White finish
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)200 x (H)320 x (D)190mm (W)7.9” x (H)12.6” x (D)7.5”
WEIGHT
3.82kg (8.4lb)
RECOMMENDED SUB
Sub 10
RECOMMENDED AMP
Zone, SmartAmp

Cuboid 6TX is a full range, two way, passive 6.5” 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 6TX 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 6TX features a 6.5” low frequency driver and a 1” silk dome high frequency driver mated to a shallow wave guide for consistent HF distribution.

Each Cuboid 6TX has an improved 60w transformer which enables the delivery of premium sound when installed on 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 6TX can be teamed with Sub 10, and a SmartAmp 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 107dB (cont) 113dB (peak)
  • 130° horizontal x 120° vertical coverage
  • IP54 for outdoor use with accessory terminal cover
  • 8 ohm or 70/100V line operation


TYPE Two-way, full range, passive 6.5” loudspeaker with transformer
FREQUENCY RESPONSE (when used with preset ) 90Hz - 20kHz +/-3dB, -10dB @ 70Hz
DRIVERSLF: 6.5”(165mm) coated paper, ferrite motor system, HF: 1” (25.4mm) Silk Dome, neodymium motor system
IP RATINGIP54 when used with accessory terminal cover
RATED POWER60 W (AES) 240W (peak)
NOMINAL IMPEDANCE
SENSITIVITY (1W/1m)89dB
MAXIMUM SPL @ 1m107dB (cont) 113dB (peak) @ 8Ω
CROSSOVER3.4kHz
RECOMMENDED HIGH PASS FILTER24dB Per Octave @ 50 Hz
TRANSFORMER TAPS @ 70v3.75, 7.5, 15, 30W
TRANSFORMER TAPS @ 100v7.5, 15, 30, 60W
DISPERSION (-6dB)130°H x 120°V
ENCLOSUREABS
FINISHBlack and White finish
PROTECTIVE GRILLE Painted Aluminium
CONNECTORS4 pin Euroblock
PIN CONNECTIONS (INPUT) Positive and negative in with link out terminals
FITTINGSM4 mounting points for wall bracket
DIMENSIONS (W)200 x (H)320 x (D)190mm (W)7.9” x (H)12.6” x (D)7.5”
WEIGHT3.82kg (8.4lb)
RECOMMENDED SUB Sub 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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