User manual RANE AC 22

[. . . ] The new AC 22 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 22 and AC 22, adjustable Delay circuits appear on the Low (& Mid when used in 3-Way mode) 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. The Low Delay circuit may be internally transplanted to the High Output when neccessary. CD horn equalization is also possible with an internal modification. See RaneNote 107 for more information regarding Linkwitz-Riley designs. 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 AC 22 Features · ¼" TRS Inputs & ¼" TS Outputs · Active Balanced/Unbalanced Inputs & Unbalanced Outputs AC 22 Features · XLR Inputs & Outputs · Fully Active Balanced Inputs & Outputs Data Sheet-1 AC 22 & AC 22 ACTIVE CROSSOVERS Parameter Crossover: Alignment . . . . . . . . . . Slopes . . . . . . . . . . Range Time Delay Adjust Range AC 22 Inputs: Type . . . . . . . . . . Connectors . . . . . . . . . . Impedance . . . . . . . . . . Maximum Level . . . . . . . . . . Gain Range AC 22 Outputs: Type . . . . . . . . . . Connectors . . . . . . . . . . Impedance . . . . . . . . . . Maximum Level . . . . . . . . . . Gain Range AC 22 Inputs: Type . . . . . . . . . . Connectors . . . . . . . . . . Impedance . . . . . . . . . . Maximum Level . . . . . . . . . . Gain Range AC 22 Outputs: Type . . . . . . . . . . Connectors . . . . . . . . . . Impedance . . . . . . . . . . Maximum Level . . . . . . . . . . Gain Range Band Muting Switches RFI Filters Infrasonic Filter Ultrasonic Filter (AC 22) Frequency Response THD+Noise IM Distortion (SMPTE) Signal-to-Noise Ratio Unit: Agency Listing . . . . . . . . . . 120 VAC model . . . . . . . . . . 230 VAC model Power Supply: Agency Listing . . . . . . . . . . 120 VAC model . . . . . . . . . . 230 VAC model . . . . . . . . . . 100 VAC model Power Supply Requirement . . . . . . . . . . Maximum Current Unit: Construction . . . . . . . . . . Size . . . . . . . . . . Weight Shipping: Size . . . . . . . . . . Weight Note: 0 dBu=0. 775 Vrms Specification Linkwitz-Riley 24 dB/octave 70-3. 6 kHz Low to High Off to +2 Active Balanced/Unbalanced ¼" TRS 20k +21 Off to +6 Active Unbalanced ¼" TS 100 +20 Off to +6 Active Balanced XLR 20k 21 Off to +6 Active Balanced XLR 200 +20 Off to +12 Yes Yes 20 Hz, 18 dB/oct. , Butterworth 40 kHz, 6 dB/oct. , Bessel 20-40 kHz 0. 02 0. 02 92 Class 2 Equipment UL & CSA CE-EMC CE-Safety UL CSA CE-EMC CE-Safety Built to JIS 18 VAC w/center tap 160 All Steel 1. 75"H x 19"W x 5. 3"D (1U) 4 lb 4. 25" x 20. 3" x 13. 75" 8 lb Limit Units Conditions/Comments Proprietary 4th-order state-variable 41-detent continuously variable pot Low & Mid Outputs 5% ms 1% 1 -0/+4 ohms dBu dB 1% 1 -0/+4 ohms dBu dB 600 ohms or greater pin 2 hot per AES standards 1% 1 -0/+4 ohms dBu dB pin 2 hot per AES standards 1% 1 -0/+4 ohms dBu dB 600 ohms or greater Low & Mid Outputs 3% 3% +0/-3 . 01 . 01 2 Hz Hz dB % % dB Linear phase +4 dBu, 20-20 kHz 60 Hz/7 kHz, 4:1, +4 dBu re +4 dBu, 20 kHz noise bandwidth National Electrical Code Exempt Class 2 equipment EMC directive 89/336/EEC Exempt per Art. The output level controls shall afford a level range of from off to +6 dB (+12 dB for the AC 22) with muting capability on the low frequency outputs. The crossover shall supply two independent channels. The unit shall be exempt from agency safety requirements and powered from a UL listed, CSA certified remote power supply (120 VAC) or CE approved (230 VAC) via a rear panel input modular plug. The unit shall be constructed entirely from cold-rolled steel, and mount into a standard 1U EIA rack. The unit shall be a Rane Corporation AC 22 or AC 22 Active Crossover. Available Accessories · SC 1. 7 Security Cover References 1. Linkwitz, "Active Crossover Networks for Noncoincident Drivers, " J. Bohn, "A Fourth-Order State-Variable Filter for Linkwitz-Riley Active Crossover Designs, " presented at the 74th Convention of the Audio Engineering Society, New York, Oct. Bohn, "Linkwitz-Riley Crossovers, " Rane Note 107, (1983). [. . . ] Bohn, "A Fourth-Order State-Variable Filter for Linkwitz-Riley Active Crossover Designs, " presented at the 74th Convention of the Audio Engineering Society, New York, Oct. Bohn, "Linkwitz-Riley Crossovers, " Rane Note 107, (1983). Bohn, "Why Not Wye?" Rane Note 109, (1984). [. . . ]