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Manual-1

AC 23B

ACTIVE CROSSOVER

OPERATORS  MANUAL

QUICK START

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.

Set the STEREO/MONO switch appropriately. The fact that the AC 23B is a multiple function unit means the outputs

are switched around in Mono mode.

To operate the unit in Stereo 3-Way mode, be sure the rear panel switches are set for STEREO 3-WAY. Following the

labels 

above

 the controls and jacks in logical order, you will find Channel 1 Master Input LEVEL, LOW Output, MID

Output, and HIGH Output, with the same for Channel 2.  If you need a summed Mono Low Ouput, see ‘Monoing the Low
Outputs’ on page Manual-7.

To use the unit as a Mono 5-Way, first check that the CHANNEL 1 and 2 switches are set to 3-WAY, and the other

switch is set to MONO. Connect the INPUT source to CHANNEL 1 

only

. Following the labels 

below

 the jacks, look at

SUB OUT, then look over at LOW OUT, now go back to MID OUT, then over to HIGH-MID OUT and then proceed to
the HIGH OUT. An internal switch determines 4 or 5-Way mode. Our apologies to 4-Way users: We must ship the units in
the 5-Way mode since normal Stereo 3-Way operation demands it: a fact not the least bit obvious, but nevertheless, a fact
it remains. Pity. See page Manual-6 for Mono 4-Way configuration.

In agreement with IEC and AES/ANSI standards, AC 22B wiring convention is pin 2 Positive, pin 3 Negative (return),

pin 1 chassis ground. See the “Sound System Interconnection” RaneNote included with this manual for more information
on cabling and grounding requirements.

CAUTION: Never connect anything except an approved Rane Power supply to the thing that looks like a red

telephone jack on the rear of the AC 23B.

 This is an 18 VAC center tapped power input. Consult the Rane factory for a

replacement or substitution.

WEAR PARTS:

 This product contains no wear parts.

MONO 4W OR 5W: INACTIVE

MID

MONO MASTER

SUBWOOFER

SUB / LOW

HIGH

LOW

LOW / MID

4W: MID / HIGH

5W: MID / HIGH-MID

4W: INACTIVE

5W: HIGH-MID / HIGH

4W: INACTIVE

5W: HIGH-MID

10

0

2

4

8

6

10

0

2

4

8

6

10

0

2

4

8

6

10

0

2

4

8

6

10

0

2

4

8

6

10

0

2

4

8

6

10

0

2

4

8

6

10

0

2

4

8

6

MAX

MIN

2

4

8

6

MAX

MIN

2

4

8

6

MAX

MIN

2

4

8

6

MAX

MIN

2

4

8

6

100

80

1k

900

850

150

200

240

750

600

400

190

250

7.0k

5.8k

550
475
350

700

2.0k
2.8k
4.5k

1.0k

190

250

7k

5.8k

550
475
350

700

2.0k
2.8k
4.5k

1.0k

100

80

1k

900

850

150

200

240

750

600

400

3W: MID / HIGH

2W: LOW / HIGH

3W: LOW / MID

2W: INACTIVE

2W: INACTIVE

3W: MID / HIGH

2W: LOW / HIGH

3W: LOW / MID

2W: INACTIVE

2W: INACTIVE

2W: LOW

ACTIVE

CROSSOVER

70

70

2W: LOW

LEVEL

LEVEL

MUTE

LEVEL

LEVEL

MUTE

FREQUENCY

DELAY

DELAY

LEVEL

FREQUENCY

FREQUENCY

LEVEL

DELAY

MUTE

FREQUENCY

LEVEL

DELAY

MUTE

LEVEL

AC 23B

CH 2

MASTER

CH 1

MASTER

POWER

FREQUENCY

LOW

MID

LOW

MID

HIGH

HIGH

Summary of Contents for AC 23B

Page 1: ...it remains Pity See page Manual 6 for Mono 4 Way configuration In agreement with IEC and AES ANSI standards AC 22B wiring convention is pin 2 Positive pin 3 Negative return pin 1 chassis ground See t...

Page 2: ...ng Crossover Frequencies on page Manual 10 HIGH LEVEL control Sets the Level of signal going to the High frequency Output only Channel 2 MASTER LEVEL control Sets the overall Level of Channel 2 withou...

Page 3: ...still active and may be used as additional subwoofer outputs STEREO MONO switch Set this switch to the STEREO out position POWER input connector Use only a model RS 1 or other power supply approved by...

Page 4: ...MUTE switch Removes all signal from the Mid Frequency Output when pressed to the in position MID DELAY control Adds from 0 to 2 ms of time Delay to this Channel s Mid Output MID HIGH crossover frequen...

Page 5: ...equency amp and the CHANNEL 2 HIGH OUT to the right channel input of the high frequency amp MID OUTPUTS Connect the CHANNEL 1 MID OUT to the left channel of the mid frequency amp and the CHANNEL 2 MID...

Page 6: ...the Mid and High Mid Outputs NOTE Both the CHANNEL 1 HIGH LEVEL control and CHANNEL 2 MASTER LEVEL control are automatically bypassed when the AC 23B is switched to MONO on the back panel Adjusting th...

Page 7: ...turned off Remove the top cover of the AC 23B 2 Locate the 4 WAY 5 WAY switch see diagram 3 Move the switch from the 5 WAY position to 4 WAY 4 Replace the cover The AC 23B is now set for Mono 4 Way M...

Page 8: ...o the input of the subwoofer or bass bin amplifier LOW OUTPUT Connect the LOW OUT to the input of the low frequency mid bass amp MID OUTPUT Connect the MID OUT to the input of the mid frequency amplif...

Page 9: ...een Channels HlGH OUTPUT Connect the HIGH OUT to the input of the high frequency amplifier STEREO MONO switch Be sure this switch is in the STEREO out position Yes STEREO A Mono circuit is created whe...

Page 10: ...first into the realm of time delay and how to adjust it it might help to spend a moment here to re affirm why on earth this delay is really necessary For a short course on time delay Linkwitz Riley a...

Page 11: ...id driver at a comfortable volume 3 With a healthy but not uncomfortable volume of noise from the mid driver set the analyzer DISPLAY LEVEL control so the LED s corresponding to the high crossover fre...

Page 12: ...ophone until it is vertically midway between the mid and low drivers Repeat steps 2 through 5 using the crossover LEVEL control MUTE switch and next DELAY control You may start each series of steps 2...

Page 13: ...ill do not obtain a 3 dB reading you will have to physically move the high driver farther forward until the SPL meter reads 3 dB The amount of displacement corrections available from the delay depends...

Page 14: ...knob setting will then be the closest for your system For example if you have a two way system crossed over at 800 Hz with the compression driver voice coil located about 9 behind the woofer voice coi...

Page 15: ...d methods of setting the crossover output Levels Setting Levels Using a Realtime Analyzer NOTE If you are running two Channels tune up only one Channel at a time 1 Set all LEVEL controls on the crosso...

Page 16: ...se 1 Run pink noise into the crossover Inputs through the mixer or directly as is convenient 2 Make sure all crossover output LEVEL controls are turned all the way down and all amplifier level control...

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