Martin Audio Blackline S12 Plus

Blackline+ systems are synonymous with exceptional sound quality and reliability and have become the benchmark for premium live music venues, nightclubs and installations worldwide.

All low frequency drivers used in the two-way systems now benefit from the addition of aluminium demodulation rings to minimise the variation in voice coil inductance as the coil moves in the gap. The result is improved midrange clarity and reduced intermodulation distortion at high excursions, ensuring that the sound balance and quality is maintained even at high levels.

In the development of the Blackline+ Series, special attention has also been given to matching the directivity of the low frequency drivers to the HF horns in the crossover region. This has been achieved by careful choice of LF cone profiles, together with improvements in the crossover design.

Blackline+ – superior by design.


Direct radiating 12" ultra-compact sub

The Blackline S12+ is an extremely compact sub-bass system. It has been designed for use with the F8+ and F10+ full-range loudspeakers in situations where extended low frequency output and increased system headroom are required. When used with an F8+ or F10+, it will extend the response of the complete system to below 50Hz.

The S12+ is provided with a top hat fitting that can be used to pole mount an F8+ or F10+ above the enclosure.


Very compact sub-bass system

Long excursion 12" (300mm) driver

Active/passive operation

Top hat fitting for pole mounting F8+/F10+

Five year limited warranty


Club sound reinforcement

Theatre sub-bass

AV presentations

TYPE Compact, sub-bass system

FREQUENCY RESPONSE (1) 52Hz-150Hz ± 3dB -10dB @ 43Hz

DRIVERS 12” (300mm)/3” (75mm) voice coil LF driver

RATED POWER (2) 400W AES, 1600W peak


SENSITIVITY (3) 100dB (half space)

MAXIMUM SPL (9) 126dB continuous,

132dB peak (half space)



CROSSOVER 120Hz active/passive low pass filter

ENCLOSURE 55 litre, multi-laminate birch ply

FINISH Textured black paint

PROTECTIVE GRILLE Black perforated steel

CONNECTORS 2 x Neutrik NL4

PIN CONNECTIONS LF+,- : 1+,1- , Link thro’: 2+,2-

FITTINGS 1 x mounting pole socket 2 x pocket handles

DIMENSIONS (W) 398mm x (H) 571mm x (D) 364mm

(W) 15.6ins x (H) 22.5ins x (D) 14.3ins

WEIGHT 20kg (44lbs)