Martin Audio Blackline F15 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.


2way passive 15" system high power PA/monitor system

Wide-bandwidth system

The high power Blackline F15+ is a high performance, wide-bandwidth system in a compact and efficient package. Extended frequency response is provided by a new 15” (380mm) LF driver and a new 1.4” (35mm) exit compression driver mounted on a rotatable 80° x 50° constant directivity HF horn. The new LF driver features a tough, water resistant cone and a lightweight, high BL, neodymium motor system with inside/outside coil windings for improved heat transfer. An aluminium demodulating ring reduces distortion and improves midrange clarity at high levels and increased excursion is available via a triple roll surround and deep motor structure. The new HF driver utilises a titanium diaphragm with controlled break-up modes for improved sonic performance at high frequencies and the crossover design and LF cone profile have been optimised to match the directivity of the HF horn and LF section through the crossover region.

A Martin Audio M3+ or DX1.5 Electronic Controller is available to provide F15+/subwoofer crossover and limiter facilities.


Wide-bandwidth system

User rotatable 80° x 50° horn

Top hat fitting for speaker stand mounting

1.4” (35mm) exit compression driver

Five year limited warranty


Live club performance

High powered stage monitoring

Club installs

TYPE Compact, two-way passive

FREQUENCY RESPONSE (5) 55Hz-18kHz ± 3dB -10dB @ 45Hz

DRIVERS 15” (380mm)/3” (75mm) voice coil, neodymium magnet LF driver

1.4” (35mm) exit HF compression driver

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



MAXIMUM SPL (9) 126dB continuous, 132dB peak


DISPERSION (-6dB) 80 ° horizontal, 50 ° vertical

CROSSOVER 1.4 kHz passive

ENCLOSURE 68 litre, multi-laminate birch ply

FINISH Textured black paint

PROTECTIVE GRILLE Black perforated steel

CONNECTORS 2 x Neutrik NL4

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

FITTINGS 12 x M8 threaded inserts

1 x mounting pole socket

2 x pocket handles

DIMENSIONS (W) 471mm x (H) 690mm x (D) 443mm

(W) 18.5ins x (H) 27.2ins x (D) 17.5ins

WEIGHT 30.5 kg (67lbs)