Rane AC 24 - Manual (Page 3)

Manual-1
AC 24
ACTIVE CROSSOVER
OPERATORS MANUAL
WEAR PARTS: This product contains no wear parts.
100
31.5
80
40
63
50
315
125
200
250
160
500
160
400
200
315
250
1.6k
630
1.0k
1.25k
800
4.0
1.25
3.15
1.6
2.5
2.0
12.5
5.0
8.0
10.0
6.3
4
2 8
4
2 8
100
31.5
80
40
63
50
315
125
200
250
160
500
160
400
200
315
250
1.6k
630
1.0k
1.25k
800
4.0
1.25
3.15
1.6
2.5
2.0
12.5
5.0
8.0
10.0
6.3
4
2 8
4
2 8 Hz
-64 0
4-WAY 4-WAY
4-WAY
kHz kHz
4-WAY 4-WAY
Hz kHz
4-WAY
kHz kHz
4-WAY
CROSSOVER
kHz Hz Hz
0 10 0 10
0 10 ms
-64 0
0 10 ms
-64 0
0 10 ms
-64 0
0 10 ms
-64 0
0 10 ms
-64 0
0 10 ms
-64 0
0 10 ms
0 10 0 10 0 10
-64 0
0 10 ms
0 10 0 10 0 10 0 10 0 10
AC 24
MID
CHANNEL
B
CHANNEL
A
LOW
FREQ FREQ FREQ FREQ
HI-MID HIGH
LEVEL LEVEL
INPUT LIMIT
OL
MONO LOW STEREO LINK
LINK LINK
DELAY
LIMIT
DELAY
LIMIT
DELAY
LIMIT
DELAY
LIMIT
DELAY
LIMIT
DELAY
LIMIT
DELAY
LIMIT
DELAY
MUTE
LEVEL LEVEL
MUTE MUTE MUTE
LEVEL
MUTE
HI-MID HIGH
HORN EQ
FREQ HI-MID HIGH
HORN EQ
POWER
MID LOW
FREQ FREQ FREQ
HI-MID HIGH
LEVEL LEVEL
INPUT
OL
MUTE
LEVEL LEVEL
MUTE
LEVEL
MUTE
M A
S
T E
R
S L
A
V E
QUICK START
The AC 24 is fully balanced with XLR connectors wired pin 2
“hot” per AES standards. Set the 3-WAY/4-WAY switch on the
rear appropriately. When in 3-WAY mode, the HI-MID controls
are inactive. The MID / HI-MID Frequency control becomes the
MID / HIGH Frequency control.
If you need a summed Mono Low Ouput, push the MONO
LOW switch on the front panel.
The FREQUENCY controls and other alignment procedures
are best set with a realtime analyzer (RTA). It’s also good to have
range specifications for the drivers used in the system. See Select
Crossover Frequencies on page Manual-4.
The DELAY controls add from 0 to 10 ms of signal delay to
each Output to assist in signal-aligning drivers. See Adjust Signal
Delay on page Manual-5.
CD HORN EQ is provided if constant-directivity horns are
used. If CD Horn EQ is not required, make sure the HORN EQ
filters are off (button out) and frequency settings are at 8 kHz. See
Set CD Horn EQs on page Manual-8.
LEVEL controls are best set using the steps provided in Set
Output Levels on page Manual-8.
The MID, HI-MID and HIGH Output LIMIT Threshold
controls are linked to preserve spectral balance. Any Output that
crosses its threshold (indicated by the indicator) will cause all
Outputs to Limit. The LOW Output is independent, and may be
linked to the others via the LIMIT LINK switch. See Set Limit-
ers on page Manual-9.
When using STEREO LINK, we recommend turning down
the Output Level controls of the SLAVE (Channel B) to mini-
mum. This prevents unwelcome surprises if the Master / Slave
function is turned off.
The SUM Outputs are useful for instrumentation devices as
indicated in the setup procedure. These may also be used for split-
band EQ and/or split-band Limiter applications. When using
these, it is important to note that CD HORN EQ and DELAYS
affect the Summed Output. If you want a flat response, do not use
Delay or CD Horn EQ when using the Sum Outputs.
The INVERT switches located on the rear panel allow you
to correct driver polarity differences without rewiring. Linkwitz-
Riley filter outputs are always in phase with correct polarity.
In agreement with IEC and AES/ANSI standards, wir-
ing convention is pin 2 positive, pin 3 negative (return), pin 1
shield chassis ground. See the “Sound System Interconnection”
RaneNote included with this manual for more information on
cabling and grounding requirements.