0 LEVEL 10 OL 0 LEVEL 31.5 10 -64 LIMIT 0 125 160 LINK 400 315 160 200 250 0 DELAY 10 ms MUTE MID 0 LEVEL 10 -64 LIMIT 0 315 250 Hz FREQ 100 40 0 DELAY 10 ms MUTE 80 200 63 50 Hz FREQ 500 MUTE 3.15 2.5 1.25 1.6 2.0 0 LEVEL 10 -64 LIMIT 0 0 DELAY 10 ms 1.25k 1.6k 4-WAY HI-MID 1.0k 630 800 4-WAY kHz FREQ 4.0 2 0 DELAY 10 ms MUTE HIGH 0 LEVEL 10 -64 LIMIT 0 12.5 10.0 8.0 5.0 6.
IMPORTANT SAFETY INSTRUCTIONS 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7. Do not block any ventilation openings. Install in accordance with manufacturer’s instructions. 8. Do not install near any heat sources such as radiators, registers, stoves, or other apparatus (including amplifiers) that produce heat. 9.
OPERATORS MANUAL AC 24 ACTIVE CROSSOVER LOW 80 100 63 200 40 CHANNEL MUTE 31.5 A MID 125 160 50 250 Hz 400 315 160 FREQ 630 800 HI-MID 4-WAY 1.0k 200 MUTE 315 500 250 1.25k Hz 4.0 1.25 FREQ HIGH 5.0 6.3 4 HORN EQ LOW 4 10.0 kHz 0 DELAY 10 ms 2 kHz 8 2 kHz CHANNEL 8 0 DELAY 10 ms MUTE 31.5 B HI-MID FREQ HIGH MID 125 160 200 40 MUTE 12.5 FREQ 0 DELAY 10 ms 100 50 4-WAY 0 DELAY 10 ms 80 63 8.0 1.6 MUTE 1.6k 3.15 2.5 2.
3 4 3 4 3 4 3 5 6 3 4 3 4 3 4 3 5 6 MUTE FREQ MUTE FREQ MUTE FREQ MUTE HI-MID HIGH MUTE FREQ MUTE FREQ MUTE FREQ MUTE HI-MID HIGH HIGH 4 HIGH 4 LOW 80 100 63 50 200 40 CHANNEL MUTE 31.5 A MID 125 160 250 Hz 400 315 160 FREQ 630 800 HI-MID 4-WAY 1.0k 200 MUTE 315 500 250 1.25k Hz 4.0 1.25 FREQ 5.0 6.3 HORN EQ LOW 4 10.0 kHz 0 DELAY 10 ms 2 kHz 8 2 kHz CHANNEL 8 0 DELAY 10 ms MUTE 31.
AC 24 8 6 5 4 3 2 8 6 5 4 7 2 SUM HIGH HI-MID MID LOW INPUT SUM HIGH HI-MID MID LOW INPUT 4-WAY 4-WAY MADE IN U.S.A. RANE CORP.
The goal is to design a 3-way or 4-way system with the flattest possible response and good dispersion. Two practical methods for crossover setup follow: 1. Use relatively low levels of pink noise and close microphone placement (18 to 36 inches)[45 to 90 cm] to minimize the effects of room acoustics. Once the system is tuned, lock the crossover behind a security cover. 2. Use measurement tools designed to analyze installed systems.
• This allows delay compensation for distances ranging from 0.0 to 135 inches (11.3 feet) [343 cm]. • The resolution of the adjustment is about 0.6 inch [1.5 cm]. Important Note: The horizontal location of a driver is determined by the front of the voice coil. Method One, Step-by-Step 1. Identify the driver that is the furthest away from the front of the stack. This driver gets zero delay. The horizontal displacement of all other drivers is measured relative to this driver. 2.
iii) Record the Low / Mid crossover frequency. iv) MUTE the AC 24 Low Output. d. Unmute AC 24 Hi-Mid output. i) The 1st low-side –6 dB red LED on the RTA indicates the Mid / Hi-Mid crossover frequency. ii) Adjust the MID / HI-MID Frequency to just light the 1st low-side –6 dB red LED closest to the desired crossover frequency. iii) Record the Mid / Hi-Mid crossover frequency. iv) The 1st high-side –6 dB red LED on the RTA indicates the Hi-Mid / High crossover frequency.
c. Set the reference level for the Low Output: i) UnMUTE the Low Output. ii) Adjust the Low Output LEVEL so the RTA LED associated with the Low / Mid crossover frequency, is green. d. Set the Low Output Delay: i) The Mid Output Delay was previously set and must not be changed. ii) UnMUTE the Low and Mid Outputs. iii) If the level goes down, driver polarity may be wrong. Check the driver polarity before proceeding.
39.4" (1 meter) mic POSITION 4 mic POSITION 3 6. Realtime Analyzer setup: a. Place the RTA mic on axis, 1 meter away from the Low driver as shown in Figure 5, Position 1. b. Set the RTA SPL Filter to C-Weighting. c. Turn on the Pink Noise. 7. Make sure the Pink Noise Level coming into the crossover is able to light the red OL indicator. mic POSITION 2 mic POSITION 1 Figure 5. Setting Output Levels with a calibrated mic. STEP FIVE: Setting Limiters Each AC 24 Crossover Output has a Limiter.
