The B4-SUB features d&b audiotechnik's patented cardioid design, using one amplifier channel and building on CSA (cardioid subwoofer array) techniques the company began using in 2004. The cabinet houses two long-excursion neodymium drivers: a front-facing 15" driver in bass-reflex design and a 12" driver in a two-chamber bandpass design to the rear. The design reduces level behind the cabinet by more than 15dB over its operating bandwidth, providing high accuracy in its low frequency ...

General Admission

This content is free to access as a registered user on

Why register for It's simple and free, and here is what you get:

  • Daily original news covering the latest in entertainment design and technology
  • Features on the latest industry trends
  • Insights from thought leaders in the industry
  • The ability to view both pay-per-view and free recorded sessions from our live events including Master Classes, LDI and Envision

Already registered? here.