The THE15 SUB PRO PASSIVE SEALED convinces in every aspect, whether in high-profile home theater systems or the editors of renowned worldwide magazines. Awesome performance paired with excellent sound quality dressed in an amazingly compact enclosure - these are the main traits of this successful and award-winning Subwoofer.

The custom built 15-inch high-tech woofer is equipped with an extremely strong neodymium magnet and 4" Voice-coil. This motor offers exceptional high acceleration and control with a linear stroke of record-breaking 36mm.

Thus, this unique driver even moves significantly more air than bigger standard 18" subwoofers. Its bass impact and authority are really stunning.

Remarkable with which timing and resolution the THE15 SUB PRO plays also the lowest lows right to the point. With these outstanding features it is ideally suited for all music or cinema applications and modern 3D sound formats such as Dolby Atmos, Auro 3D or DTS:X. The qualities of this powerhouse also enhances high-quality stereo high-end systems. THE15 SUB PRO – A high-tech Sub – compact, fast, abyssal and impressive.

Technical Data

Speaker type

15" custom-built forward-firing woofer, 4” voice-coil, neodymium motor


18 mm excursion each direction (90 mm linear), voice coil remaining in homogeneous magnetic field, linear and lowest distortion

Passive | Active


Recommended amplifiers 

1Ch DSP + 1 Amplifier are required. Recommended Amplifier:  70 Vrms, 99 Vpk, 17,5 A; equivalent to 1200W@4 Ohms with correct RMS & Peak limiting & compression settings.

Recommended ASCENDO amplifiers  

(With additional external 1CH DSP: AIA2-1404, AIA2-2704, AIA2-6004, AIA4-6004), DSP4-10K2  




Measurement data
130 dB @ 63 Hz peak"

Frequency range

Measurement data
55 Hz - 500 Hz /   -3 dB
27 Hz - 500 Hz / -15 dB"


93 dB  / 1W/m

Power handling 

1500 W


8 Ω  

Air volume displacement 

1,4 L / in comparison 15" standard cinema subwoofer 0,62 L

Directivity horizontal x vertical in Deg°


Input terminal

Neutrik Speakon


Internally braced birch ply and MDF


16,73 " | 425 mm


18,50 " | 470 mm

Hight with feet 

19,49 " | 495 mm

Depth without grill 

18,90 " | 480 mm

Depth with plug

21,26 " | 540 mm


62,83 lbs | 28,5 kg


Structural paint black

Custom colour options 

Piano lacquer, colour of choice, matt or other finishes upon request

Shape customization 

Upon request 


Floor standing with feet


Technical modifications subject to change without further notice