Rane AC 24 User Manual
AC 24
CROSSOVER
4
HORN EQ
4
8.0
6.3
5.0
4.0
3.15
2.5
2.0
HI-MID HIGH
1.0k
800
630
500
400
315
250
MIDLOW
200
160
125
100
80
63
50
28
FREQHI-MID HIGH
kHz kHz
28
MUTE
10.0
12.5
kHzHzHz
1.25
1.6
MUTE
1.25k
1.6k
160
200
250
315
FREQ FREQ FREQ
31.5
40
MUTE
B
CHANNEL
4-WAY
0 10 ms
0 10 ms
0 10 ms
0 10 ms
DELAY
DELAY
DELAY
DELAY
4-WAY
AC 24
CROSSOVER
LIMIT
-64 0
LIMIT
-64 0
LIMIT
-64 0
LIMIT
-64 0
INPUT
POWER
LEVEL
LEVEL LEVEL
LEVELLEVEL
OL
0 10 0 10 0 10 0 10 0 10
SLAVE
4
HORN EQ
4
8.0
6.3
5.0
4.0
3.15
2.5
2.0
4-WAY 4-WAY
HI-MID HIGH
1.0k
800
630
500
400
315
250
MID
200
160
125
100
80
63
50
LOW
28
FREQ
kHzkHz
HI-MID HIGH
28
MUTE
10.0
12.5
4-WAY 4-WAY
1.25
1.6
1.25k
1.6k
Hz kHz
160
200
MUTE MUTEMUTE
250
315
Hz
FREQ FREQ FREQ
31.5
40
MUTE
A
CHANNEL
4-WAY
0 10 ms
0 10 ms
0 10 ms
0 10 ms
A
STE
R
M
MONO LOW STEREO LINK
LIMIT
-64 0
-64 0
-64 0
LIMIT
LIMIT
0 10 0 10 0 10
LEVEL
LEVEL LEVEL
DELAY
DELAY
DELAY
LINK LINK
LIMIT
DELAY
LEVELLEVEL
-64 0
OL
INPUT
0 10 0 10
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, registers, stoves, or other apparatus (including ampliers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. e wide blade or third prong is provided for your safety. If the provided plug does not
t into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord and plug from being walked on or pinched particularly at plugs, convenience receptacles, and the point where it exits from
the apparatus.
11. Only use attachments and accessories specied by Rane.
12. Use only with the cart, stand, tripod, bracket, or table specied by the manufacturer, or sold with the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been damaged in any way, such as power supply
cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does
not operate normally, or has been dropped.
15. e plug on the power cord is the AC mains disconnect device and must remain readily operable. To completely disconnect this apparatus from
the AC mains, disconnect the power supply cord plug from the AC receptacle.
16. is apparatus shall be connected to a mains socket outlet with a protective earthing connection.
17. When permanently connected, an all-pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in the electrical installation of the building.
18. If rackmounting, provide adequate ventilation. Equipment may be located above or below this apparatus, but some equipment (like large power
ampliers) may cause an unacceptable amount of hum or may generate too much heat and degrade the performance of this apparatus.
19. is apparatus may be installed in an industry standard equipment rack. Use screws through all mounting holes to provide the best support.
WARNING: To reduce the risk of re or electric shock, do not expose this apparatus to rain or moisture. Apparatus shall not be exposed to dripping
or splashing and no objects lled with liquids, such as vases, shall be placed on the apparatus.
NOTE: is equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. ese
limits are designed to provide reasonable protection against harmful interference in a residential installation. is equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment o and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
CAU TION: Changes or modications not expressly approved by Rane Corporation could void the user's authority to operate the equipment.
is Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
WARNING
To reduce the risk of electrical shock, do not open the unit. No user
serviceable parts inside. Refer servicing to qualied service personnel.
e symbols shown below are internationally accepted symbols that warn
of potential hazards with electrical products.
is symbol indicates that a dangerous voltage
constituting a risk of electric shock is present within
this unit.
is symbol indicates that there are important
operating and maintenance instructions in the
literature accompanying this unit.
OPERATORS MANUAL
AC 24
ACTIVE CROSSOVER
LOW
CHANNEL
0100 10
INPUT
A
0 10 ms
-640
OL
MUTE
DELAY
LIMIT
LEVELLEVEL
MID
100
80
125
63
160
50
200
40
250
MUTE MUTEMUTE
31.5
315
Hz
FREQ FREQ FREQ FREQ
0 10 ms
DELAY
-640
LIMIT
LINK LINK
010010 010
LEVEL LEVEL
HI-MID HIGH
500
400
630
315
800
250
1.0k
200
1.25k
160
1.6k
Hz kHz
4.0
3.15
5.0
4-WAY 4-WAY
2.5
6.3
2.0
8.0
1.6
10.0
MUTE
1.25
12.5
4-WAY 4-WAY
0 10 ms
DELAY
-640
LIMIT
0 10 ms
DELAY
-640
LIMIT
LEVEL
HORN EQ
4
28428
kHzkHz
HI-MID HIGH
4-WAY
MONO LOW STEREO LINK
QUICK START
e 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. e 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.
e 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.
e 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.
e MID, HI-MID and HIGH Output LIMIT reshold
controls are linked to preserve spectral balance. Any Output that
MIDLOW
100
80
125
63
160
50
200
40
CHANNEL
M
S
A
L
S
A
T
V
E
E
R
0100 10 010010 010
INPUT
B
0 10 ms
-640
OL
MUTE
DELAY
LIMIT
LEVELLEVEL
250
31.5
315
FREQ FREQ FREQ
0 10 ms
DELAY
-640
LIMIT
LEVEL LEVEL
500
400
315
250
200
160
HI-MID HIGH
3.15
2.5
2.0
1.6
MUTE
1.25
0 10 ms
DELAY
-640
LIMIT
4.0
kHzHzHz
630
800
1.0k
1.25k
1.6k
5.0
6.3
8.0
10.0
MUTE
12.5
010 ms
DELAY
-640
LIMIT
LEVEL
HORN EQ
4
28428
kHz kHz
FREQ
HI-MID HIGH
4-WAY
AC 24
CROSSOVER
POWER
crosses its threshold (indicated by the indicator) will cause all
Outputs to Limit. e 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. is prevents unwelcome surprises if the Master / Slave
function is turned off.
e SUM Outputs are useful for instrumentation devices as
indicated in the setup procedure. ese may also be used for splitband 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.
e INVERT switches located on the rear panel allow you
to correct driver polarity differences without rewiring. LinkwitzRiley filter outputs are always in phase with correct polarity.
In agreement with IEC and AES/ANSI standards, wiring 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.
4-WAY
WEAR PARTS: is product contains no wear parts.
Manual-1
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