Styled in red, the SPL Crossover is an active, analog 2-way crossover to coordinate your main speakers with your subwoofer, doing so without any DSP or analog-to-digital technology at all. The unit splits your signal, diverting midrange and high-range audio to your main monitors, and leaving the lows to route to the subs. The design utilizes SPL's 120V rail technology to ensure high headroom and crystal clear performance, and makes use of switches and pots to select among crossover frequencies, phase positions, low-level, and more. It's designed to work in both 2.1 and 2.2 setups, so if you utilize stereo subwoofers, this device will be suitable for your uses.
The unit splits signal into two sections: Low and Mid-Hi, doing so at ranges from 50 to 120 Hz in 6 different steps. The roll-off frequency for the Mid-Hi section can be 12 or 24 dB for octave to better complement your set up. Time aligning the low-end is very important, and this can be done via the flip of a phase switch, or on a continuously variable basis, giving you a full 360° of phase options to select among.
A low-cut filter is on hand to roll off frequencies below 20 Hz, which can be useful in keeping power amplifiers from trying to produce virtually inaudible frequencies that can cause sonic interference—and not a lot more. You can also vary the output of the subwoofer section on this device, doing so with a range of 20 dB. With the 3.5mm Control section, you can power up to four compatible power amplifiers straight from the Crossover, sending them 12V signals to switch them from stand-by to on.