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.

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B 15A back

Self-Powered version of B 15

This subwoofer has its own internal amplifier with no less than 800W output power and an own DSP with display onboard.

Cardioid subwoofer setups

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.

Starfish rubber-feet

Starfish rubber-feet

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


B 15

B 18

B 21


B 15A 5
B 15A
Frequency range (-3 dB) *: 39 Hz - 87 Hz
Frequency range (-10 dB) *: 33 Hz - 113 Hz
Coverage angles (-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



B15 SFi M
Stacking frame for mounting the M-F3A PRO on top of a B 15 or B 15A subwoofer

B15 SFI L35

B15 SFi L35
Stacking frame for mounting the L 35 on top of a B 15 or B 15A subwoofer


M20 Pole support to pole mount an M-F3A or M-F3A PRO on any B-Line subwoofer

B15 FC

B15 FC
Flightcase for B 15 or B 15A

B15 TD

B15 TD
Dolly board for B 15 or B 15A subwoofer

B15 TC

B15 TC
Transport cover for B 15 or B 15A


Amplifer rain cover for self-powered subwoofer B 15A