X18Bi - 18'' Subwoofer

The Beta Three® X18Bi is a subwoofer loudspeaker designed to be used with the X-Series full range loudspeakers for high performance systems. They are excellent for live, rental and portable sound reinforcement applications. The Xi Series delivers extraordinary performance at unmatched value.  


  • Single 18"phase inverted subwoofer.
  • Computer aided design to optimize frequency and phase response.
  • Frequency response range: 36Hz - 2kHz (-3dB).
  • Sensitivity 97dB, MAX.SPL 121dB/127dB(PEAK).
  • Rated power 500W, 2000W (PEAK).


X18Bi Application

X18Bi Installation

X18Bi Parts

X18Bi Cases

X18Bi Collocation



Filename Version Language Size Updated
β3_X18Bi_PA_Chinese_Manual β3_X18Bi_PA_Chinese_Manual 1 β3_X18Bi_PA_Chinese_Manual  575.39KB 2018-07-12 02:25:39
β3_X18Bi_PA_English_Manual β3_X18Bi_PA_English_Manual 1 β3_X18Bi_PA_English_Manual  357.78KB 2018-07-12 02:25:39