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Manual-1

AC 23

ACTIVE CROSSOVER

OPERATORS MANUAL

AC 23 CONNECTION

Balanced/Unbalanced Inputs

The ¼" Input jacks on the AC 23 are TRS (tip-ring-

sleeve). We recommend connecting the AC 23 with a bal-

anced cable from the balanced output of a mixer or equalizer.

If a balanced output is not available, and the cable run is

less than ten feet (three meters), inserting an unbalanced ¼"

TS (tip-sleeve) plug works in most situations.

Unbalanced Outputs

The ¼" Output jacks on the AC 23 are unbalanced TS

(tip-sleeve). We recommend that cables to the amplifiers be

no longer than ten feet (three meters).

See the “Sound System Interconnection” RaneNote

included with this manual for more information on cabling

and grounding requirements.

QUICK START

This is an automatic crossover! By automatic, we mean that the AC 23 is smart enough to know whether you want to

run it as a two channel crossover, or as a single channel unit. It knows by the way the plugs are inserted how your system is

to be configured. However, just because it is automatic, doesn’t mean that it will not automatically confuse you when you

try to connect it in a bench test situation. Note: Labels above the controls refer to the unit being operated in the 2- or 3-

Way Stereo mode. Labels below the controls refer to the unit being operated in the 4- or 5-Way Mono mode.

Plugging a signal into the CHANNEL 1 INPUT and nothing into the CHANNEL 2 INPUT tells the unit that you are

running a single channel system in Mono 4- or 5-Way mode, and therefore sets the unit up to be a single channel device.

This can lead one to think that there are some dead channels in the unit when looking for output in places where there

shouldn’t be any. The even more automatically confusing part is the way that the Output connectors decide whether the unit

is a 4-Way or 5-Way crossover. It is actually rather straightforward.

To test the unit as a Mono 4-Way, first slide the CHANNEL 1 and 2 switches on the back to 3-WAY. Connect the

INPUT source to CHANNEL 1 only. Following the labels below the jacks, look at SUB OUT, then look at LOW OUT,

now go back to MID OUT, and then proceed to the HIGH OUT. So far, so good.

To test the AC 23 as a Mono 5-Way, the only precaution required is there must be a “dummy” plug (¼" unconnected

plug) inserted into the HI MID OUT to program the crossover properly. When you reach the point where you want to

measure the output of the channel with the dummy in it, simply remove it and insert your test output plug in that location.

When operating the AC 23 as a Stereo 3-Way, follow the diagram on page Manual-5, reading the labels above the jacks

and controls. To drive both Channels with a mono signal, connect only to the CHANNEL 2 INPUT. This approach is the

same as if you used a wye cable to both Inputs.

The AC 23B is available as a fully balanced output version equipped with XLR connectors (for inputs and outputs)

instead of the ¼" jacks. If you are connecting to balanced amplifiers from the AC 23 or are running crossover output cable

lengths greater than 10 feet (or 3 meters), we highly recommmend you purchase an AC 23B.

Never connect anything except an RS 1 or other approved Rane AC power supply to the thing that looks like a

telephone jack on the rear. This is an 18 VAC center-tapped power unit. Consult the Rane factory for replacement or

substitution.

WEAR PARTS: This product contains no wear parts.

1 2 3 4 5 6 ... 17 18

Resumo do Conteúdo

Página 1 - OPERATORS MANUAL

Manual-1AC 23ACTIVE CROSSOVEROPERATORS MANUALAC 23 CONNECTIONBalanced/Unbalanced InputsThe ¼" Input jacks on the AC 23 are TRS (tip-ring-sleeve).

Página 2 - Manual-2

Manual-10OPERATING INSTRUCTIONSSelecting Crossover FrequenciesMost speaker manufacturers supply low and/or highfrequency cut-off points for each drive

Página 3 - Manual-3

Manual-11STEP BY STEP PROCEDUREA 3-Way mode consisting of High, Mid and Low driversis used here as an example. For other configurations, use thesame p

Página 4 - Manual-4

Manual-12until the display shows +3 dB (red). The amount ofdisplacement correction available from the Delaydepends on the actual crossover frequency:

Página 5 - Manual-5

Manual-134. Now press in the MID MUTE switch on the crossover sothat the tone is removed from the mid driver. Withoutre-adjusting either the meter or

Página 6 - Manual-6

Manual-14 Delay vs. Frequency TableIf you do not have the equipment necessary to electroni-cally align the system as described in previous sections, y

Página 7 - IMPORTANT NOTE

Manual-15Setting the Output Level ControlsChoosing the crossover frequencies was the easy part.Now it gets real fun. The idea is to set the output Lev

Página 8 - Manual-8

Manual-16Setting Levels Using an SPLMeter & Pink Noise GeneratorThe MUTE switches on the AC 23 make using an SPLmeter an easy and relatively accur

Página 9 - Manual-9

Manual-17occasionally there is a need to delay the CD horn as itsdiaphragm is usually in front of the other drivers in theenclosure (see Fig. 5). If y

Página 10 - Time Delay Adjustment

Manual-18Monoing the Low FrequencyOutputsIt is now possible to mono the Low Frequency Outputs ofthe AC 23 by an internal jumper modification. This req

Página 11 - Time Delay Adjustment Using

Manual-2FRONT PANEL: STEREO 2-WAY CONFIGURATIONObserve the labels screened above the controls for stereo operation.NOTE: In the 2-Way mode, the AC 23

Página 12 - Manual-12

Manual-3Observe the labels above the Inputs and Outputs for Stereo operation.햲 CHANNEL 1 INPUT: These ¼" Inputs accept either balanced TRS (tip-

Página 13 - Manual-13

Manual-4FRONT PANEL: STEREO 3-WAY CONFIGURATIONObserve the labels screened above the controls for stereo operation.햲 POWER switch: Two guesses.햳 POWER

Página 14 - Manual-14

Manual-5REAR PANEL: STEREO 3-WAY INSTALLATIONObserve the labels above the Inputs and Outputs for Stereo operation.햲 CHANNEL 1 INPUT: These ¼" Inp

Página 15 - Analyzer

Manual-6Observe the labels screened below the controls for mono operation.햲 POWER switch: Two guesses.햳 POWER indicator: When this yellow LED is lit,

Página 16 - Modification

Manual-7헂 Hl MID LEVEL control: This controls the Level of signal going to the Hi Mid Output only in 5-Way Mode. **NOTE TO4-WAY MONO USERS: An interna

Página 17 - Manual-17

Manual-8REAR PANEL: MONO 4-WAY AND MONO 5-WAY INSTALLATIONObserve the labels below the Inputs and Outputs for mono operation.햲 MONO INPUT: These ¼&quo

Página 18 - Equalization Modification

Manual-9REAR PANEL: ALTERNATE MONO 4-WAY INSTALLATIONNote: The internal switching in the AC 23 will result in a Mono 4-Way configuration with the cros

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