Legacy LXR2A 3Way Stereo Electronic Crossover Network with Bass Boost Selectable 45/80120Hz Subwoofer Bass Boost Control Low Pass: 50, 90 & 180 Hz Midrange Bandpass Between 50/90/180Hz and 2/4/6KHz High-Pass 2/4/6kHz Crossover Slopes: 12dB/Octave