technical specifications BF121
general•High-output, direct-radiating 12” subwoofersystem•

Long-excursion double-spider 12” woofer with 4”
voice-coil•

Optimal drive performance with ALC amplified
loudspeaker controller•

SIS™ pre-wired for very high damping and further
reduced distortion•

Low impedance for efficient amplifier loading•

Front-positioned NL4 connector for easy cardioid
connection

description
The BF121 is a high-performance subwoofer system,
delivering tight and accurate bass response with very
low distortion. It features a single 12” long-excursion
woofer, with double-spider suspension and 4” voicecoil in a bass-reflex configuration.
The direct-radiating woofer is mounted in a ventedchamber, with large bass reflex port for excellent
breathing capacity, increasing overall output while
minimising port-compression.

phase and filtering matching with all Alcons topsystems, including cardioid projection control presets.
The additional front-positioned NL4 connector caters
for easy “reverse connection” in cardioid arrays.
The 4 ohms system impedance, makes for a very
efficient amplifier loading; Thus enabling maximum
output from a single, very compact configuration.

The double baffle board and the combination ofcomplex internal panel lay-out with extensive bracing
brings a rigid structure with a high enclosure stiffness
from a relatively low-weight package.

The BF121 is SIS™ pre-wired: Through the Signal
Integrity Sensing circuit of the ALC, the cable-lengthand connector resistance between the BF121 and ALC
is dynamically compensated (system damping factor
10.000), further reducing distortion, while increasing
response accuracy.

For full system performance, the BF121 is driven
and controlled by the ALC amplified loudspeakercontroller; Driven by the ALC, the BF121 delivers
maximum sound quality and output power withlong-term operation reliability. The integrated factory
presets in the drive processor of the ALC offer gain,

The BF121 is available in road-version and installation(“i”) version, without handles, wheel dolly board andM20 threaded stand mount flange. It is finished in
Durotect™ scratch-resistant coating; Through theArchitect Color Option™ program, the BF121 can befinished in any RAL™ color.

030919 • Due to Alcons Audio’s continuous R&D, all specifications are subject to change without prior notice.

evolutionary audio solutions™

technical specifications BF121
dimensional drawing

technical specifications
Frequency response

40 Hz - 300 Hz(+/- 3 dB)

Sensitivity nominal

33 Hz -		(+/- 10 dB)

Sensitivity nominal

94 dB (40 - 100 Hz)

Nominal impedance

4 ohmsRecommended drive

Sentinel3 min.

500

400

500

Nominal SPL peak
500

500

641

123 dB (Sentinel3 40 - 100 Hz)
128 dB (Sentinel10 40 - 100 Hz)
133 dB (comparative)

400

Dispersion H x V641

physical specifications
Systemsubwoofer, front loadedDrivers LF

1x AW12.4-4 12”, ventedConnectors

3x Speakon NL4 input/link (2 rear, 1 front)

Physical dimensions

A:Alcons Audio
De Corantijn 69
1689 ANZWAAGThe Netherlands

E:
W:
T:
F:

info@alconsaudio.com
www.alconsaudio.com+31 (0)229 28 30 90+31 (0)229 28 30 99

omni / (hyper) cardioid in array with processing

030919 • Due to Alcons Audio’s continuous R&D, all specifications are subject to change without prior notice.

mm		inches

Height400 		

15.7

Width500		

19.7

Depth500		

19.7

Weight (approx.)kg		lb

BF 12135,5		78.3

BF 121i

29,5		65.0

Warranty

6 years limited

evolutionary audio solutions™