AC 23S Active Crossover

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)

AC 23S Active Crossover

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 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 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.

AC 23S Literature

Each unit is shipped with a booklet containing all of the above, the RaneNote "Sound System Interconnection," Declaration of Conformity, and Rane's 2+ Year Warranty information.

AC 23S Support

How can I get my AC 23 crossover point below 190 Hz in 2-way stereo mode?

The AC 23 is not designed for 2-way operation below 190 Hz. You can "fake it" by using a summing Y-cable (check out Why Not Wye?) on the mids and highs in 3-Way mode. This allows you to use the Low/Mid (70 - 1 khz) filter for the lows. If you're really adventurous, you can modify the filter limits...download this PDF note on Crossover Modifications.

My AC 23 doesn't have the 2-way / 3-way switches on the rear panel, how can I run it in 2-way mode?

Earlier AC 23 units did not offer 2-way mode operation. They run 3-way stereo, 4-way mono and 5-way mono only. Externally combining a pair of signals -- mids and highs or mids and lows -- provides a means to achieve 2-way functionality. As above, the summing Y-cable is used to mix two signals together, (see Why Not Wye?).

My AC 23 is in 3-way mode but there are no highs in channel 2 and no mids in channel 1.

The AC 23 has switching jacks and must have connectors plugged into every jack (as shown in the AC 23 manual) for the configuration being used. This is the most common call we get. Try plugging connectors into all of the outputs, then verify their operation.

If the above doesn't answer your question:
Phone the Rane Factory at 425-355-6000, 8:30 AM to 5 PM PST, Monday to Friday.
Email is answered most weekdays from the Rane Factory Contacts.
The Rane Forum may have the answer you need.
USA Service and Warranty is listed by State.
International Service is listed by Country.

Other Rane Crossovers

For the best crossover in a DSP solution, see the HAL System.

Model

Analog Inputs

Analog Outputs

RAD inputs

RAD outputs

Total Inputs

Total Outputs

HAL1x

8

8

8

8

16*

16*

HAL2

8

8

8+2

8+2

18

18

HAL3

2

6

2

2

4

8

*A HAL1x can be expanded to 512 inputs and 512 outputs.

AC 23S Active Crossover