B 15A

B 15A old 3

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 old 4

Port design

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

Octopus feet

The so called “octopus feet” are made from some flexible rubber/plastic material, which provides good slip resistance.
B 15A old 5
B 15A old 6

Cardioid 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 old 7
B 15A
Frequency range (-3 dB) *: 39 Hz - 87 Hz
Frequency range (-10 dB) *: 33 Hz - 113 Hz
Coverage (-6dB) [H x V]: Omnidirectional
Maximum Peak SPL**: 136 dB
System type: 1-way self-powered system
Crossover frequency: -
Transducers: 1 x 15" driver
Enclosure type: Vented box
Type: Single channel, class-D with SMPS
Output power: 800 W
Protection: Short circuit, overheating, overcurrent
Connectors: Input signal: balanced XLR 3-pin female
Link output: balanced XLR 3-pin male
Power input: powerCON® 20A
Power link output: powerCON® 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, EQ, delay, 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 recesses for stacking
M20 pole thread
Stacking: Two-point SE Audiotechnik® stacking system
Splay angles: -
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
All product specifications are subject to change without prior notice. * Measured with MF3AP preset
** Measured with 12 dB Crest factor Pink Noise, half space

* Half-space (1 W / 1 m)
** max. SPL peak = Sensitivity + 10 x log10 (RMS Power) + 12 dB Crest Factor
*** Peak Power = Average Power + 6 dB Crest Factor

- All product specifications are subject to change without prior notice. -


B 15A old 8

B 15 TD

Dolly Board for B 15 and B 15A subwoofer

B 15 Dolly Board

B 15A old 9

SPS 20

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

SPS 20


Engineering Data Sheet


EU declaration of conformity - Self-Powered Loudspeakers

EU declaration of conformity - Rigging and Accessories