Martin Audio Blackline F215 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 2x15" system high power dual bass PA system


Two-way passive reflex with dual bass drivers

The Blackline F215+ is a two-way passive, trapezoidal enclosure with dual 15” (380mm)/3” (75mm) voice coil low frequency drivers and a 1.4” (35mm) exit titanium diaphragm compression driver, mounted on a proprietary, rotatable, 80° x 50° constant directivity horn.

Below 250Hz, both LF drivers operate together to produce low frequencies, whilst above 250Hz, only the upper LF driver is used to reproduce the midrange up to the crossover point. This technique avoids the uneven response which would occur if both drivers were allowed to operate together over the midband.

Each of the two new LF drivers 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 improves the midrange performance at high levels and increased excursion is available via a triple roll surround and deep motor structure.

The F215+ can be used with or without a controller. Use of the M3+ or DX1.5 will enhance the low frequency performance of the system and provide high quality limiters to protect the F215+ from being overdriven.



Very high SPL from a full range passive enclosure

Extended low frequency performance from dual

15” (380mm) low distortion drivers

User rotatable 80°x 50° horn

1.4” (35mm) exit titanium dome compression driver

Five year limited warranty


Live sound reinforcement

Drum monitor

Nightclub installations

Sidefill monitor


TYPE Two-way passive reflex with dual bass drivers.

FREQUENCY RESPONSE (5) 45Hz-18kHz ± 3dB -10dB @ 40Hz

DRIVERS 2 x 15” (380mm)/3” (75mm) voice coil,

neodymium magnet LF drivers

1.4” (35mm) exit HF compression driver

RATED POWER (2) 800W AES, 3200W peak



MAXIMUM SPL (9) 130dB continuous, 136dB peak


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

CROSSOVER 1.4 kHz passive

ENCLOSURE 180 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 M10 threaded inserts

4 x 4” (100mm) castors

3 x pocket handles

DIMENSIONS (inc wheels) (W) 560mm x (H) 1066mm x (D) 496mm (627mm)

(W) 22ins x (H) 42ins x (D) 19.5ins (24.7)

WEIGHT 59 kg (130lbs)