Rane AC22 Active Electronic Crossover Sold Out.

The Rane AC22 is a late 1980s USA manufactured unit that can be used in STEREO as a Two Way crossover, or in MONO as a Three Way crossover.  It can be used for professional PA applications as part of a Biamped or Triamped PA rack, for Biamplified Recording Studio monitors, or in a high end biamplified home stereo system. 

Here are some Features and Specifications from RANE:

AC 22 & AC 22B ACTIVE CROSSOVERS

Features

• Stereo 2-Way or Mono 3-Way
• Linkwitz-Riley Alignment with 24 dB per Octave Slopes
• Adjustable Delays
• Mono Subwoofer Switch and Output
• Infrasonic, Ultrasonic, and RFI Filters
• Low Output Muting (2-Way)
• Input & Output Level Controls
• UL/CSA/CE and 100/120/230 VAC Remote Power Supplies

Full Specification pdf can be seen here.