B 15A

B 15A is our new multi-purpose active subwoofer model designed to serve a wide variety of applications.

It features a punchy 15″ speaker, either in an active (B 15A) or passive built (B 15).

This active version is equipped with an 800 Watt class-D amp with integrated DSP crossover.


B 15A

Port design

Aerodynamic port design reduces distortion and airflow noise. The unique asymmetric shape reduces port noise drastically by (-35 dB).
B 15A

Octopus feet

The so called “octopus feet” are made from some flexible rubber/plastic material, which provides good slip resistance.

Cardioid subwoofer setups

Due to the intelligent stacking design and the front* and rear sockets, it is possible to operate our B-Line subwoofers as a cardioid setup without any problems.


* B 15A and B 15A W do not have any front sockets.
B 15A


Model:B 15A / B 15A W
Frequency Range (-3 dB)* 39 Hz - 87Hz
Frequency Range (-10 dB)* 33 Hz - 113 Hz
Coverage (-6dB) [H x V] Omnidirectional
Maximum Peak SPL** 136 dB
System Type 1-Way Active System
Transducers 1 x 15" Driver
Enclosure Type Vented Box
Type Single Channel
Class-D with SMPS
Output Power 800 W
Protection Short Circuit
Connectors Input Signal: Balanced XLR 3-Pin Female
Link Output: Balanced XLR 3-Pin Male
Power Input: PowerCON® 20A
Power Link Output: OowerCON® 20A
Wiring Pin 1: Ground
Pin 2: Positive
Pin 3: Negative
Input Sensitivity +14 dBu (3.88 V)
+4 dBu (1.23 V)
0 dBu (0.775 V) 0 dBV (1 V) -10 dBV (0.316 V)
DSP 48 kHz/24-bit with Extended Dynamics
Processing Latency: 1.1 ms
Processing Factory and User Presets
Directivity Control
Phase Inversion
Input Sensitivity
User Controls Power: On/Off Switch
DSP: Display with Digital Encoder
Product Dimensions [H x W x D] (Including Rigging) 520 x 495 x 654 mm
Net Weight 34 kg
Packaging Dimensions [H x W x D] 613 x 550 x 733 mm
Total Weight 37.1 kg
Cabinet 15 - 18 mm Plywood
Cabinet Finishing Black or White Polyurea Coating
Grille Powder Coated Perforated Steel
Hardware 2 SE Audiotechnik® Ergonomic Handles
4 Rubber Feet and Top Slots for Stacking
M20 Pole Thread
Stacking Two-Point SE Audiotechnik® Stacking System
Stacking Frame for M-F3A PRO B15 SFi M
Stacking Frame for L35 B15 SFi L35
Pole Bar SPS20
Flight Case B15 FC
Transport Dolly B15 TD
Transport Cover B15 TC
Amplifier Rain Cover P801DL RC

* Measured with [...] preset
** Measured with 12 dB Crest factor Pink Noise, half space

All product specifications are subject to change without prior notice.


B 15A

B 15 Dollyboard

Dollyboard for B 15 and B 15A subwoofer

B 15 Dollyboard

B 15A

M-F3A SPS 20

M20 Pole support to mount M-F3A PRO (or M-F3A) on top of our subwoofers.

M-F3A SPS 20


Engineering Data Sheet


EU declaration of conformity - Active Loudspeakers

EU declaration of conformity - Rigging and Accessories