The BST Cross21 is a 3-way active crossover with two adjustable cut-off frequencies and a separate subwoofer output with balanced inputs/outputs and comes with a 1U rack mount case.
The Cross21 features a low-pass filter with an adjustable cut-off frequency from 50-250Hz whereas the mid/high-pass filter has an adjustable cut-off frequency from 250Hz-6 kHz. The low-cut filter rolls off the low bass frequencies at 30Hz at -12dB per octave.
The Cross 21 crossover features level controls on all outputs as well as using balanced XLR inputs and outputs for easy connectivity.
Sub control: 50-250Hz (-24/10dB)
Low/high controls: 250Hz-6KHz (-24/10dB)
Input impedance: 100KOhms
Output impedance: 220 Ohms
Low cut filters: 20Hz/3dB (12dB/octave)
Frequency response: 20Hz - 25KHz
Dimensions: 483x44x146mm
S/N ratio: >95dB
Weight: 2Kg