The Martin Audio F15

The Martin Audio F15, often found in the “Blackline” series (e.g., Blackline F15+), is a high-performance, wide-bandwidth loudspeaker system built for professional audio applications where power, clarity, and efficient deployment are crucial. This two-way passive speaker is a versatile workhorse, equally at home in live music venues, clubs, as a stage monitor, or in installed sound systems.

Key Features and Performance:

Drivers:
Low Frequency (LF): A robust 15-inch (380mm) LF driver with a 3-inch (75mm) voice coil and a lightweight neodymium magnet motor system. This driver is designed with a water-resistant cone, inside/outside coil windings for improved heat transfer, and a triple-roll surround for increased excursion. An aluminum demodulating ring helps reduce distortion and improve midrange clarity at high levels.

High Frequency (HF): A 1.4-inch (35mm) exit compression driver featuring a titanium diaphragm. This driver is engineered for controlled break-up modes, ensuring superior sonic performance and clarity at high frequencies.

Horn and Dispersion: The HF driver is mounted on a user-rotatable 80° x 50° constant directivity horn. This allows for flexible aiming and consistent sound dispersion whether the speaker is used in a vertical or horizontal orientation, ensuring even coverage for the audience.

Frequency Response and Power Handling: The F15 offers an extended frequency response typically from 55 Hz to 18 kHz (±3 dB), with usable output down to 45 Hz (-10dB). It has a rated power handling of 400 W AES (continuous) and 1600 W peak, making it suitable for high-output applications.

Crossover: An internal passive crossover network integrates the LF and HF drivers, typically at 1.2 kHz or 1.4 kHz, optimized to match the directivity of both drivers through the crossover region.

Enclosure and Versatility:
Constructed from multi-laminate birch ply, the enclosure is both durable and acoustically sound.
It features a multi-angle design, allowing it to be used effectively as a high-capacity floor monitor.
Twelve M8 threaded inserts provide versatile mounting options for wall, ceiling, or flown configurations.

An integral top hat fitting allows for standard pole mounting on speaker stands, and can also serve as a pole socket when used with a subwoofer.

Connectivity and Impedance: The F15 is a passive 8-ohm nominal impedance speaker, equipped with two Neutrik NL4 (Speakon) connectors for secure and reliable signal connection.

Applications: The Martin Audio F15 is ideal for:

Live club performances and small to medium-sized venues.

High-powered stage monitoring.

DJ and electronic music events requiring punchy bass and clarity.

Fixed installations in churches, conference rooms, and theaters.

Dimensions and Weight: Typically measuring around 471 mm (W)×690 mm (H)×443 mm (D) (18.5ins x 27.2ins x 17.5ins), and weighing approximately 30.5 kg to 33 kg (67lbs to 72.6lbs).

The Martin Audio F15 is a highly regarded loudspeaker for its blend of compact size, impressive power handling, refined sound quality, and the flexibility it offers for various professional audio setups.