O-Line Installed Sound


Micro-line array

Where to Buy or Rent

The O-Line delivers consistent audio coverage with unprecedented accuracy in a wide variety of architectural environments, using only one amplifier channel per array in many applications. By utilising a complement of unique, Martin Audio designed drivers, and mechanical alignment techniques, simple EQ and Limiting is the only processing required. A powerful software application provides extremely accurate intercabinet and array angles, in order to achieve optimum coverage over a predefined area. O-Line's aesthetically pleasing cabinet is finished in neutral light grey.


  • Scalable micro line array for maximum deployment flexibility
  • Software optimised array configuration for focussed sound energy
  • Sidelobe-free vertical dispersion from the high frequency section
  • Ideal for high-quality music reproduction as well as speech
  • Architecturally sympathetic design for discreet deployment


  • Churches
  • Museums
  • Sports venues, Conference centres
  • Theatres, Auditoria, Shopping malls, Transport terminals
  • Concert halls, Bars, Restaurants, Lecture theatres

Each O-Line array is constructed by connecting together multiple array modules. Up to 24 modules can be connected where both high output and vertical focussing down to low/mid frequencies are required. Smaller numbers of modules (down to 4) can be used for shorter-throw applications, where vertical focussing of these frequencies is less important.

Rather than applying DSP to a traditional column, O-Line's vertical beam-forming is achieved by physically articulating individual array modules to curve the array. The actual array configuration for a specific venue is determined by powerful, patent pending optimisation software which makes intelligent judgements about the ‘goodness’ of the array’s SPL distribution against objective target functions.

O-Line uses a line of five custom-designed dome tweeters, with a spacing of only 21mm between each element. The result is sidelobe-free vertical dispersion from the high frequency section.

The ‘cones’ of the custom-designed LF drivers are sculpted from an ultra-light, stiff material and precisely follow the ideal contour of the HF horn walls (patent pending). This provides constant horizontal directivity from low mid, right up to extreme high frequencies.

User guide Brochure Measurement Data
Module Configuration
One Module 4 8 12 Show All
One Module
TYPE Two-way micro-line array module
FREQUENCY RESPONSE (5) 85Hz-20kHz ± 3dB, -10dB @ 76Hz
DRIVER 2 x 3.5" (87mm)/1" (25mm) voice coil LF drivers
5 x 0.55" (14mm) soft dome tweeters
RATED POWER (2) 50W AES, 200W peak
SENSITIVITY (8) 84dB at LF rising to 92dB at HF
MAXIMUM SPL (9) 104dB continuous, 110dB peak
DISPERSION (-6dB) 100º horizontal, 5º vertical
CROSSOVER 2.5kHz passive
ENCLOSURE 4 litre ported cabinet, moulded in ABS
FINISH Light grey
PROTECTIVE GRILLE Light grey perforated steel
CONNECTORS 4 pole socket
PIN CONNECTIONS +/- in, +/- link out
FITTINGS Captive inter-connecting bracket assembly
6 x M8 fixings for wall and flying brackets
DIMENSIONS (W) 246mm x (H) 115mm x (D) 198mm
(W) 9.7ins x (H) 4.5ins x (D) 7.8ins
WEIGHT 3.6kg (7.9lbs)
4 Modules
Sensitivity (6)
Power handling(Watts, AES)
  • 200 cont.
  • 800 peak
Maximum SPL (cont./peak) 116dB/122dB
Max Coverage Distance 8-12m
Array length 0.47m
Array mass 14.4kg
8 Modules
Sensitivity (6)
Power handling(Watts, AES)
  • 400 cont.
  • 1600 peak
Maximum SPL (cont./peak) 122dB/128dB
Max Coverage Distance 16-25m
Array length 0.94m
Array mass 28.8kg
16 Modules
Sensitivity (6)
Power handling(Watts, AES)
  • 800 cont.
  • 3200 peak
Maximum SPL (cont./peak) 128dB/134dB
Max Coverage Distance 25-40m
Array length 1.9m
Array mass 57.6kg
Martin Audio O-Line Tech Drawing
Technical Drawings for O-Line.

All information is Copyright. Martin Audio Ltd.



Flying Bracket Kit


Wall Bracket Kit for 8-16 x O-Line


Wall Bracket Kit for 4 x O-Line


Bottom Plate

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Copyright Martin Audio Ltd.
Subject to change without notice.
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