Available: Used

The Rane AC 23 Active Crossover can be configured as a stereo 2- or 3-way, or a mono 4- or 5-way. It employs 4thorder Linkwitz-Riley filter alignments to minimize phase difficulties in the critical crossover region. The AC 23 uses ¼" TRS connectors with balanced/unbalanced Inputs and unbalanced Outputs. The AC 23B uses XLR  connectors with active balanced Inputs and Outputs.

Simply put, a Linkwitz-Riley alignment is two cascaded 2nd-order 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 23, 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. CD horn equalization is now possible with an internal modification. Time Delay can also be internally transplanted to the Mid and High Outputs if desired.


  • Stereo 2- or 3-Way, Mono 4- or 5-Way
  • Linkwitz-Riley Alignment with 24 dB per Octave Slopes
  • Adjustable Delays
  • Infrasonic, Ultrasonic and RFI Filters
  • Low & Mid Output Muting (3-Way)
  • Input & Output Level Controls
  • UL/CSA/CE and 100/120/230 VAC Remote Power Supplies
  • XLR Inputs & Outputs
  • Fully Active Balanced Inputs & Outputs


Crossover: Alignment

  • Linkwitz-Riley (Proprietary 4th-order state-variable)
  • Slopes: 24 dB/Octave
  • Range (3-way): 70-1 kHz Low to Mid (41-detent continuously variable pot)
  • Range (3-way): 190-7 kHz Mid to High (as above)
  • Range (2-way): 190-7 kHz Low to High (as above)

Time Delay Adjust Range:

  • Off to +2 (Low & Mid Outputs only)


  • Impedance: 20k
  • Maximum Level: +21
  • Gain Range: Off to +6
  • Type: Active Balanced
  • Connectors: XLR


  • Type: Active Balanced
  • Connectors: XLR
  • Impedance: 200
  • Maximum Level: +20 (600 ohms or greater)
  • Gain Range: Off to +12

Band Muting Switches: Yes (Low & Mid Outputs only)

RFI Filters: Yes

Infrasonic Filter: 20 Hz, 18 dB/Oct, Butterworth

Ultrasonic Filter:

  • 40 kHz, 18 dB/Oct, Bessel (Linear phase)

Frequency Response: 20-40 kHz

THD+Noise: 0.02

IM Distortion (SMPTE): 0.02

Signal-to-Noise Ratio: 92

Unit: Agency Listing: 120 VAC model

  • Class 2 Equipment National Electrical Code
  • UL & CSA

Power Supply Requirment: 18 VAC w/center tap

Maximum Current: 750

Unit: Construction: All Steel

Size: 1.75" H x 19" W x 5.3" D (1U)

Weight: 5 lbs


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