Bi8 subwoofer

d&b audiotechnik Bi8-SUB subwoofer detailview front d&b audiotechnik Bi8-SUB subwoofer detailview rear d&b audiotechnik Bi8-SUB subwoofer detailview front hanging with accessoryd&b audiotechnik Bi8-SUB subwoofer detailview front standing
d&b audiotechnik Bi8-SUB subwoofer detailview front
d&b audiotechnik Bi8-SUB subwoofer detailview rear
d&b audiotechnik Bi8-SUB subwoofer detailview front hanging with accessory
d&b audiotechnik Bi8-SUB subwoofer detailview front standing

Bi8 subwoofer

Subwoofers

Installation specific ultra compact subwoofer

  • Components 2 x 6.5"
  • Dispersion omnidirectional
  • SPL max 122 dB
  • Weight 17 kg / 37.5 lb

Article number Z0631

Where to buy

Product description

The Bi8-SUB is an ultra compact subwoofer that pairs with the established d&b xC, xS and E-Series loudspeakers. The Bi8-SUB is the installation version of the B8 subwoofer and differs only in cabinet construction and mounting hardware. The Bi8-SUB features two 6.5” drivers housed within a bass-reflex cabinet design. Its low height (170 mm) makes it an ideal solution for small scale applications that require an extended low frequency response while still achieving high Sound Pressure Levels. The frequency response extends from 43 Hz to 170 Hz. When operating in 100 Hz mode, the upper operating frequency of the subwoofer is reduced from 170 Hz to 125 Hz.

The Bi8-SUB can be flown either horizontally or vertically. Two M8 threaded inserts are incorporated, one on each side panel to allow the attachment of a dedicated flying bracket.

The enclosure is constructed from marine plywood with an impact resistant black paint finish. The front of the cabinet is protected by a rigid metal grill backed by an acoustically transparent foam. The rear panel incorporates two NL4 connectors and a two pole screw terminal block. The Bi8-SUB is also available in Special Colour (SC) and Weather Resistant (WR) options. The Weather Resistant option provides an IP55 rating and enables operation of loudspeakers in changing ambient conditions.

Amplifiers

The following current d&b amplifiers can be used to drive the loudspeaker:

Mobile

Installation


For further information on which heritage d&b amplifiers can be used to drive the loudspeaker, please refer to the current release notes on the amplifier firmware.
System data
Frequency response (-5 dB standard)
43 Hz - 170 Hz
Frequency response (-5 dB 100 Hz mode)
43 Hz - 125 Hz
Max. sound pressure1
with 10D
with D25/5D/25D
with D40/D80/D90/40D

120 dB
122 dB
122 dB
Cabinets per amplifier channel
2
Loudspeaker data
Configuration
Ultra compact subwoofer
Nominal impedance
8 Ω
Power handling capacity (RMS/peak 10 ms)
200/800 W
Components
2 x 6.5" driver with ferrite magnet
Connections
2 x NL4 M
1 x screw terminal (ST - up to 4 mm2/AWG 11)
WR option: Faston type connector 2 x 6.3 mm, female
Pin assignment
NL4 M: 2+/2–
WR option: brown +/blue –
Dimensions / weight
Dimensions (h x w x d)
170 x 436 x 580 mm
6.7 x 17.2 x 22.8"
Weight
17 kg
37.5 lb

1 1 m, free field, SPL max peak, test signal: pink noise with crest factor 4, one speaker driven. For possible performance deviations when using multiple loudspeakers, check 5D Powershare Calculator tool.

Title
Category
File type
Size
Language
Release
 
2D DWG CAD package 1.4
2D CAD drawings
ZIP
388 MB
25.02.2025
2D DWG CAD package Release notes 1.4
2D CAD drawings
PDF
626 KB
English
25.02.2025
3D DWG CAD package release notes 1.5
3D CAD drawings
PDF
346 KB
English
07.05.2026
3D DWG CAD package 1.5
3D CAD drawings
ZIP
252 MB
07.05.2026
The xS-Series brochure
Brochures
PDF
3.84 MB
English
02.05.2023
B8 / Bi8 Introductory brochure
Brochures
PDF
1.56 MB
English
30.07.2019
Bi8-SUB Datasheet 1.2
Datasheets
PDF
365 KB
English
04.05.2026
Architectural specifications Bi8-SUB 1.2
Loudspeakers
TXT
1.76 KB
English
04.05.2026
Bi8-SUB Manual 1.1
Manuals
PDF
1.72 MB
English
28.03.2019
d&b Revit Families - xS-Series - Release notes 1.3
Revit files/BIM
PDF
591 KB
30.04.2026
d&b Revit Families - xS-Series 1.3
Revit files/BIM
ZIP
43 MB
30.04.2026
d&b Revit Families - xC-Series / Bi8 1.2
Revit files/BIM
ZIP
9.47 MB
29.01.2020
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Mobile application or fixed installation? Indoors or outdoors? Large or small? d&b provides tailored-made solutions for each and every requirement. What is more, the dedicated simulation software optimizes the planning of the system installation.
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