Rane AC 23B Operator's 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.
The AC 23B is a fully balanced version of the popular AC 23 and is equipped with 3-pin (XLR-type) connectors instead
of the standard ¼" TRS jacks. A STEREO/MONO switch has been added to the AC 23B and should be set appropriately.
Switching jacks are not provided. All other specifications and operation are identical.
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 INPUT, LOW OUT, MID OUT, and HIGH
OUT, with the same for CHANNEL 2. The fact that the AC 23B is a multiple function unit means the outputs are switched
around in Mono mode. 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 HI MID OUT and then
proceed to the HIGH OUT. An internal jumper 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 neverthe-
less, a fact it remains. Pity. See page Manual-6 for Mono 4-Way configuration.
CAUTION: Never connect anything except an approved Rane Power supply to the thing that looks like a red tele-
phone 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.
AC 23B CONNECTION
In agreement with IEC and AES/ANSI standards, AC 23B
wiring convention is pin 2 Positive, pin 3 Negative (return),
pin 1 Signal ground (for unbalanced use), with the connector
case or shell tied to chassis ground.
Balanced Operation
Use only when driving from a true balanced source and
driving to a true balanced destination—either transformer
coupled or active drive. Connect the input to pins 2 and 3 with
pin 2 positive. Do not connect pin 1. Terminate the shield to
the case or shell. Connect the output to pins 2 and 3 with pin
2 positive. Do not connect pin 1. Connect the shield to the
case or shell.
WEAR PARTS: This product contains no wear parts.
OPERATORS MANUAL
ACTIVE CROSSOVER
Unbalanced Operation
Connect the input between pins 2 and 1 with pin 2
positive and pin 1 Signal ground. Short pin 3 to pin 1.
Terminate the shield to the case or shell. Connect the output
between pins 2 and 1 with pin 2 Positive. Leave pin 3 open—
do not short it to pin 1. Connect the shield to the case or shell.
Combination Operation
For combined balanced and unbalanced operation, use
whichever half of the above instructions apply for each end.
See the "Sound System Interconnection" RaneNote
included with this manual for more information on cabling
and grounding requirements.
AC 23B
Manual-1