JL Audio CR-1

The CR-1 is the crossover JL Audio built because every other solution to the subwoofer integration problem was a compromise. Digitally controlled analog signal path — the precision of digital attenuation and control without digital conversion artifacts in the audio signal. Two independent banks of Linkwitz-Riley filters: a low-pass for the subwoofer, a high-pass for the main speakers, both tunable from 30 to 150Hz on the front panel. Crossover slope selectable between 12 and 24dB per octave. A ±12dB balance control between satellite and subwoofer levels. Separate damping controls for each filter bank. The case for the CR-1 is simple: most preamplifiers don't have a subwoofer output, and the ones that do use a fixed crossover point that doesn't account for what the main speakers actually do in the room. The CR-1 goes in the signal path between the preamplifier and the power amplifier — balanced or unbalanced — and gives you continuous, front-panel control over where the crossover happens, how steeply it rolls off, and how the subwoofer level sits relative to the mains. THD+N below 0.002% at full output. Input and output impedances matched for any amplifier and preamplifier combination.