Micro-line array

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.

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.


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

Technical Specifications: One Module

TYPE Two-way micro-line array module
FREQUENCY RESPONSE (5) 85Hz-20kHz ± 3dB -10dB @ 76Hz
DRIVERS 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
RECOMMENDED AMPLIFIER 100W-200W in to 16 ohms
SENSITIVITY (6) 84dB at LF rising to 92dB at HF
MAXIMUM SPL (7) 104dB continuous, 110dB peak
DISPERSION (-6dB) 100º horizontal, 5º vertical
CROSSOVER 2.5 kHz 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)

Technical Specifications: Array

No. of modules 4 8 16
Sensitivity (6),(2.83V) 96dB 96dB 102dB
Impedance 4 ohms 8 ohms 4 ohms
Power handling(Watts, AES) 200 cont. 400 cont. 800 cont.
800 peak 1600 peak 3200 peak
Maximum SPL (cont./peak) 116dB/122dB 122dB/128dB 128dB/134dB
Max coveragedistance 8-12m 16-25m 25-40m
Array length 0.47m 0.94m 1.9m
Array mass 14.4kg 28.8kg 57.6kg

Technical Drawing – View

Commercial Installation

Further Information