The B17i is a compact installation subwoofer in a symmetrically vented enclosure, equipped with one 18" long excursion driver.

The fully symmetrical enclosure design enables identical performance with all set-up variations. Also directional sub arrays with partly reversed subwoofers are unrestrictedly possible in all combinations. Whether upright or crosswise, stacked on top of each other or side- by-side.

The B17i comes with i-series standard screw terminal connections
at the rear with optional speakONTM and cable gland available. Four recessed M10 threads allow multiple mounting options via brackets or steel wires.

Clubs, bars, restaurants, theatres, Conference rooms or churches & TV studios

Key features

  • Installation subwoofer in a compact, symmetrically vented enclosure
  • 18" long excursion chassis with 4" voice coil and 2400 W program power capacity
  • 4 × M10 screw threads for mounting of swivel bracket and eyebolt
  • Equipped with i-series screw terminal; speakONTM and cable gland optional
  • Coherent phase response with all TW AUDiO subwoofers
  • Operation with dedicated TW AUDiO presets on Lab.gruppen PLM/D or Powersoft K/X series

B17i The compact installation subwoofer.

Technical data

Drivers1 × 18" LF
Frequency range37 Hz - 110* Hz
Power capacity program / peak2400 / 4800 W
Impedance8 Ω
Sensitivity 1 W / 1 m96 dB
SPL max / 1 m132 dB
Connectionscrew terminal IN± | LINK±
Optional connectionsspeakON™ NL4
cable gland
Dimensions (H × W × D)500 × 600 × 600 mm
19.7 × 23.6 × 23.6 in [19.69 × 23.62 × 23.62 × 0.93 × 0.93 in]
Weight34 kg | 75 lbs [75 lbs]
FinishWarnex texture paint
OptionsRAL colors, polyurea coating (black)
*With dedicated presets a frequency of up to 200 Hz can be achieved.



B17i manual EN (PDF - File)
14. July 2022 - Revision 2.0
B17i_Datasheet_EN_1.0 (PDF - File)
14. February 2019 - Revision 1.0


B17i DXF 2D (ZIP - File)
30. June 2023 - Revision 1
B17i PDF Drawings (PDF - File)
7. March 2023 - Revision 1


BS17i (GLL - File)
26. January 2022 - Revision 1.3

Accessories B17i

References B17i

High energy at Jalou with TW AUDiOs M10

Originally launched in Newcastle Upon Tyne, the nightclub-style bar recently spearheaded a planned country-wide expansion by opening in York. Now, both Jalou sites have been completed with powerful but precise sound reinforcement courtesy of TW AUDiO.
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Office Ludwigsburg
Osterholzallee 140 - 2 / D-71636 Ludwigsburg