6 0 10 LEVEL 4 8 2 MONO MASTER 2 CH 1 MASTER 6 8 MUTE 2 1k SUB / LOW FREQUENCY 70 6 0 10 LEVEL 3W: LOW / MID 2W: INACTIVE 240 400 200 600 6 4 150 750 100 850 900 2 8 80 MIN MAX DELAY 4 SUBWOOFER 0 10 LEVEL 4 LOW 2W: INACTIVE 8 MID MUTE MID 2W: LOW 2 MIN MAX DELAY 4 7.0k FREQUENCY 4W: MID / HIGH 5W: MID / HIGH-MID 190 2 4 6 CH 2 MASTER 0 10 0 10 LEVEL LEVEL MONO 4W OR 5W: INACTIVE 3W: MID / HIGH HIGH 2W: LOW / HIGH 1.0k 700 2.0k 550 6 4 6 2.8k 475 4.5k 350 5.
IMPORTANT SAFETY INSTRUCTIONS For the continued safety of yourself and others we recommend that you read the following safety and installation instructions. Keep this document in a safe location for future reference. Please heed all warnings and follow all instructions. Do not use this equipment in a location where it might become wet. Clean only with a damp cloth. This equipment may be installed in an industry standard equipment rack.
OPERATORS MANUAL AC 23B ACTIVE CROSSOVER CH 1 LOW 2W: INACTIVE MASTER 4 6 2 4 8 6 2 0 10 LEVEL MONO MASTER 4 8 0 10 LEVEL 2 MUTE 6 3W: LOW / MID 2W: INACTIVE 240 400 600 200 4 750 150 100 850 900 2 8 80 MIN MAX DELAY SUBWOOFER 70 1k FREQUENCY SUB / LOW MID 2W: LOW 6 0 10 LEVEL 4 8 6 2 MUTE MID MIN MAX DELAY 3W: MID / HIGH HIGH 2W: LOW / HIGH 1.0k 700 2.0k 550 4 6 2.8k 475 4.5k 350 5.8k 2 8 250 8 190 7.
FRONT PANEL: STEREO 2-WAY CONFIGURATION Stereo 2-Way labels in this row. CH 1 LOW MASTER 4 2W: INACTIVE 6 2 4 8 2 0 10 LEVEL MONO MASTER 1 6 4 8 0 10 LEVEL 6 2 MUTE MIN MAX DELAY SUBWOOFER * MID 3W: LOW / MID 2W: INACTIVE 240 400 200 600 4 150 750 100 850 900 2 8 80 70 1k FREQUENCY 2W: LOW 6 4 8 0 10 LEVEL SUB / LOW 6 2 MUTE MIN MAX DELAY MID 2 3 4 3W: MID / HIGH HIGH 2W: LOW / HIGH 1.0k 700 2.0k 550 4 6 2.8k 475 4.5k 350 5.8k 2 8 250 8 7.
REAR PANEL: STEREO 2-WAY INSTALLATION 1 Right Input 2 Left Input Stereo 2-Way labels in this row. AC 23B POWER HIGH OUT 7 8 LOW-3W / OMIT-2W ACN 001 345 482 CHANNEL 2 IN STEREO 3W / 2W CHANNEL 2 STEREO 3W 2W 260mA CLASS 2 EQUIPMENT MID-3W / LOW-2W MADE IN U.S.A. RANE CORP.
FRONT PANEL: STEREO 3-WAY CONFIGURATION Stereo 3-Way labels in this row. CH 1 LOW MASTER 4 2W: INACTIVE 6 2 4 8 2 0 10 LEVEL MONO MASTER 1 6 4 8 0 10 LEVEL 6 2 MUTE MIN MAX DELAY SUBWOOFER 3 4 5 MID 3W: LOW / MID 2W: INACTIVE 240 400 200 600 4 150 750 100 850 80 900 2 8 70 1k FREQUENCY 2W: LOW 6 8 0 10 LEVEL SUB / LOW 6 4 6 2 MUTE MIN MAX DELAY MID 7 8 9 3W: MID / HIGH HIGH 2W: LOW / HIGH 1.0k 700 2.0k 550 4 6 2.8k 475 4.5k 350 5.8k 2 8 250 8 190 7.
REAR PANEL: STEREO 3-WAY INSTALLATION 1 Right Input Left Input 2 Stereo 3-Way labels in this row. AC 23B POWER HIGH OUT LOW-3W / OMIT-2W CHANNEL 2 IN ACN 001 345 482 STEREO 3W / 2W CHANNEL 2 STEREO 3W 2W 260mA CLASS 2 EQUIPMENT MID-3W / LOW-2W MADE IN U.S.A. RANE CORP.
FRONT PANEL: MONO 4-WAY AND 5-WAY CONFIGURATION Mono 4-Way and 5-Way labels in this row. CH 1 LOW MASTER 4 2W: INACTIVE 6 2 4 8 2 0 10 LEVEL MONO MASTER 1 6 4 8 0 10 LEVEL 6 2 MUTE MIN MAX DELAY SUBWOOFER 2 3 4 MID 3W: LOW / MID 2W: INACTIVE 240 400 200 600 4 150 750 100 850 900 2 8 80 70 1k FREQUENCY 2W: LOW 6 8 0 10 LEVEL SUB / LOW 5 4 6 2 MUTE MIN MAX DELAY MID 6 7 8 3W: MID / HIGH HIGH 2W: LOW / HIGH 1.0k 700 2.0k 550 4 6 2.8k 475 4.5k 350 5.8k 2 8 250 8 7.
t HlGH-MID MUTE switch: Removes all signal from the High-Mid Output when pressed to the in position. This control is disabled in 4-Way mode. y HlGH-MID DELAY control: This control adds from 0 to 2 ms of time Delay to the High-Mid Output only. This control is disabled in 4-Way mode. u HlGH-MID/HIGH crossover frequency selector: This control sets the crossover Frequency between the High-Mid and High Frequency Outputs. This control is disabled in 4-Way mode.
REAR PANEL: MONO 4-WAY AND MONO 5-WAY INSTALLATION 1 Input Mono 4- and 5-Way labels in this row. AC 23B POWER HIGH OUT LOW-3W / OMIT-2W CHANNEL 2 IN STEREO 3W / 2W CHANNEL 2 STEREO 3W 2W 260mA CLASS 2 EQUIPMENT MID-3W / LOW-2W MADE IN U.S.A. RANE CORP.
REAR PANEL: ALTERNATE MONO 4-WAY INSTALLATION Input Patch Cable 1 Mono 4- and 5-Way labels in this row. AC 23B POWER HIGH OUT LOW-3W / OMIT-2W CHANNEL 2 IN ACN 001 345 482 STEREO 3W / 2W CHANNEL 2 STEREO 3W 2W 260mA CLASS 2 EQUIPMENT MID-3W / LOW-2W MADE IN U.S.A. RANE CORP.
OPERATING INSTRUCTIONS Selecting Crossover Frequencies Most speaker manufacturers supply low and/or high frequency cut‑off points for each driver, especially if these are supplied in a system. These cut‑off frequencies are based on each driver’s performance at and beyond this point, with a certain safety margin to accommodate more gentle filter roll‑offs and resultant higher output beyond the recommended performance range.
Time Delay Adjustment Using Realtime Analyzer & Pink Noise This method outlines the use of a realtime analyzer, pink noise generator and flat response microphone to set crossover time delay. Some references will be made to the Rane RA 30 realtime analyzer for those with the intelligence and good taste to use one of these regularly. The procedure applies to virtually any analyzer system.
Time Delay Adjustment Using SPL Meter & Tone Generator Now that good quality realtime analyzers are becoming more affordable and easier to use, there are few reasons why one of these should not be regularly used in any sound system. If an analyzer is simply not available, an accurate delay setting can be obtained by using an SPL meter (obtainable at most local electronics stores, the best is the Rane RA 30) and some kind of variable tone generator.
Delay vs. Frequency Table If you do not have the equipment necessary to electronically align the system as described in previous sections, you may use the table below to obtain a rough and approximate phase alignment of your drivers. Measure the horizontal displacement between the voice coils of the two adjacent drivers sharing the same crossover point, then find the column in the table nearest your actual displacement.
Setting the Output Level Controls Choosing the crossover frequencies was the easy part. Now it gets real fun. The idea is to set the output Level controls on the crossover so that the entire speaker system has a uniform, flat response. Unfortunately, the room in which the speakers are placed has a habit of always getting into the act, so things get messy. As a result there seems to be two schools of thought regarding the use of active crossovers.
Setting Levels Using an SPL Meter & Pink Noise Generator The MUTE switches on the AC 23B make using an SPL meter an easy and relatively accurate means of tuning a system. The Rane RA 30 has everything you need, an SPL meter and a pink noise source. If you can’t get one of those right now, obtain a good SPL meter and a pink noise generator from a local electronics store. You may also use a sweep or tone generator in place of a pink noise source.