Rane AC 24A User Manual

Cross-over Crossover.

Our new AC 24 combines the power of Rane DSP

AC 24

Since HF
compression
drivers trade
even response
for wider dis­persion, we’ve
included 2 kHz­8 kHz Horn EQ
for High and
Hi-Mid bands.

Inside, a univeral
power supply
automatically
switches to any
local voltage.

dB

LOW

0

10

20

Typical 4-way
crossover appli­cation. Dial it
into the AC 24
without hooking
up a computer
or (dare we say
it?) dragging
or dropping
anything.

We wrote the book! Buy your

technical glossary and PC/
Mac CD-ROM. Available at
www.rane.com

copy of our
Pro Audio
Reference.
320 pages of
RaneNotes,

®

with straightforward easy-to-use analog controls.

ith rotary
knobs on the

W

front and formidable
digital signal process­ing power inside, the
AC 24 does things no
other stereo 4-way
crossover can.

It gives you the
precision of 24 dB/
octave slopes — yet
maintains perfect
filter phase accuracy.

Link switch applies
the same limiting to
all channel bands.

Or apply different
limiting to each band.
LEDs show the status.

MID

Thank you Siegfried Linkwitz (and Mr. Riley,
too). They came up with the filter design,

we pioneered its use in pro audio. Maintaining
Linkwitz-Riley crossover’s phase accuracy
at 24 dB per octave is no easy feat using analog
components. It also requires proper delay for
each transducer. That’s the beauty of the AC 24
24 –— it does its work in the digital domain,
maintaining perfect filter phase accuracy and
allowing the easy addition of individual delays.

HIGH MID

Rane Corporation 425-355-6000

Mukilteo Washington USA

All rotary controls
merely send data to
the internal DSP
(instead of actually
being in the signal
path), so they don’t
affect sound quality.

Hi-Mid / High crossover
point (4-way mode) is
variable from 1.25 kHz
to 12.5 kHz.

0 ms to 10 ms delay
control on each band.

HIGH

Mute switches on each
band.

Mid / High crossover
point is variable from
160 Hz to 1.6 kHz.

3-Way / 4-Way modes.

he AC 24’s

T

internal DSP lets

us include a 0 ms to

10 ms delay on each

band so you can
time-compensate
your drivers.

Individual/linkable
limiters let you crank
out maximum SPLs.
Separate dual-band
CD Horn EQs
optimize compres­sion driver frequency
response.

All this with perfect
phase accuracy, higher
reliability than
analog units and top
notch RFI immunity.

Visit our website
or call us for more
information on the
digital crossover for
people who still like
to get their hands on
real knobs.

•

•

•

•

•

•

•

•

•

•

www.rane.com

When you press the
Stereo Link button, the
left channel becomes the
master and the right chan­nel becomes the slave;
LEDs show the status.

Separate left and right
input controls with
overload LED.

Low Frequency Mono
button.

AC 24

4th-Order, 24 dB/
octave Linkwitz­Riley alignment

Stereo 4-Way or
3-way operation

Independent (dual­mono) or linked,
(stereo) operation

Split-band limiters
Driver alignment

delay
Separate Hi-Mid

and High Filter CD
horn EQs

Invert switch for
each filter output

Stereo or mono low
output

Summed output
Universal internal

power supply