D&B Audiotechnik Z0631.001 Bi8-SUB: The Compact Powerhouse for Deep Bass
Unleash the thunderous bass with the Bi8-SUB! This ultra-compact subwoofer pairs seamlessly with d&b xC, xS, and E-Series loudspeakers. Ideal for small-scale applications, it offers extended low-frequency response and high Sound Pressure Levels.
- • Compact Design: With a low height of just 170 mm, it fits perfectly into tight spaces.
- • Versatile Mounting: Can be flown horizontally or vertically using the included M8 threaded inserts.
- • Durable Build: Constructed from marine plywood with a protective metal grill and weather-resistant options.
The Bi8-SUB features two 6.5” drivers in a bass-reflex cabinet. Its frequency response ranges from 43 Hz to 170 Hz (125 Hz in 100 Hz mode). Max SPL is 122 dB, and it weighs 17 kg.
Features:
- Components 2 x 6.5'
- Dispersion omnidirectional
- SPL max 122 dB
- Weight 17 kg / 37.5 lb
Specifications:
- System data:
- Frequency response (-5 dB standard): 43 Hz - 170 Hz
- Frequency response (-5 dB 100 Hz mode): 43 Hz - 125 Hz
- Max. sound pressure:
- with 10D: 120 dB
- with D20/30D: 122 dB
- with D40/D80/40D: 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
- Pin assignment:
- 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



The Bi8-SUB is perfect for small-scale audio setups like cafes, bars, and small venues. It's designed for sound engineers and venue owners who want great bass without taking up much space. With dimensions of 170 x 436 x 580 mm and a weight of 17 kg, it's easy to install and move around. Its frequency response from 43 Hz to 170 Hz (125 Hz in 100 Hz mode) ensures powerful bass, while the max SPL of 122 dB fills the space with rich sound.