AC 23S Active Crossover

• Stereo 2- or 3-Way, or Mono 4- or 5-Way
• Linkwitz-Riley Alignment with 24 dB per Octave Slopes
• Adjustable Driver Alignment Delays
• Infrasonic, Ultrasonic and RFI Filters
• Low & Mid Output Muting (3-Way)
• Mono Sub Output Option
• Constant-Directivity Horn EQ Option
• Input & Output Level Controls
• Fully Active Balanced XLR Inputs & Outputs
• Internal Universal Power Supply (100-240 VAC)
• General Description
  The Rane AC 23S Active Crossover can be configured as a stereo 
  2- or 3-way, or a mono 4- or 5-way. It employs 4th-order Linkwitz-Riley filter alignments to minimize phase difficulties in the 
  critical crossover region. The AC 23S uses XLR connectors with 
  active balanced Inputs and Outputs.
  Simply put, a Linkwitz-Riley alignment is two cascaded 2ndorder Butterworth filters exhibiting identical phase characteristics on their low-pass and high-pass outputs. This characteristic 
  guarantees in-phase outputs at all frequencies. In-phase outputs 
  are mandatory for proper acoustic summing of common signals 
  from adjacent drivers in the crossover region. An added benefit of 
  this topology is steep 24 dB per octave rolloff slopes. A slope of 
  this magnitude guarantees drivers designed to produce a specific 
  range of frequencies, and no more, will not be driven past their 
  limits, thereby minimizing distortion and driver fatigue.
  To further guarantee the transparent operation of the 
  AC 23S, adjustable Delay circuits appear on the Low & Mid  
  Outputs of each Channel to compensate for any physical misalignment of the drivers. Time correction ensures the mechanical 
  phase alignment of adjacent drivers will be acoustically correct, 
  thus maintaining the integrity of the electrical phase alignment 
  of the crossover’s filters. 
  In 2- or 3-way stereo mode, the low outputs may be mono'ed 
  by moving an internal jumper. Constant directivity (CD) horn 
  equalization is possible with an internal modification. See the 
  manual for details.
  See the RaneNote Linkwitz-Riley Crossovers for more infor