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Manual-2 – Rane AC 24 User Manual

Page 4

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Manual-2

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

1

9

9

3

4

3

4

3

4

3

5

6

8

9

9

7

7

7

7

2

2

2

2

11 10 1

9

9

3

4

3

4

3

4

3

5

6

8

9

9

7

7

7

7

2

2

2

2

12

FREQ

FREQ

FREQ

LEVEL

MONO LOW

STEREO LINK

LIMIT

LINK

LIMIT

LIMIT

LIMIT

DELAY

DELAY

DELAY

DELAY

MUTE

MUTE

MUTE

LEVEL

LEVEL

LEVEL

LEVEL

MUTE

HI-MID

HIGH

FREQ

FREQ

FREQ

LEVEL

POWER

LIMIT

LINK

LIMIT

LIMIT

LIMIT

DELAY

DELAY

DELAY

DELAY

MUTE

MUTE

MUTE

LEVEL

LEVEL

LEVEL

LEVEL

MUTE

HI-MID

HIGH

1

Channel INPUT LEVEL controls and OL indicator:

Set the overall Levels of Channels A and B without altering the relative

settings of the Low, Mid, Hi-Mid and High frequency Outputs. The range is 80 dB, and maximum gain is 6 dB. The OL warn-

ing indicator lights 4 dB before clipping. Audio taper is down 16 dB at the center of rotation (dot 5). Unity gain is the white dot

between dots 7 and 8.

2

Low, Mid, Hi-Mid and High Output LEVEL controls:

Sets the signal Level going to each of the Crossover Outputs. The Hi-Mid

control is inactive in 3-Way Mode. Refer to ‘Setting the Output Level Controls’ on page Manual-7. Audio taper is down 16 dB at

the center of rotation (dot 5). Unity gain is the white dot between dots 7 and 8.

3

Low, Mid, Hi-Mid and High Output MUTE switches:

When pressed to the in position, all signal is removed from the respective

frequency Output. This eases tune-up procedures as described beginning on page Manual-4.

4

Crossover FREQUENCY controls

: Set the crossover frequencies between the Low, Mid, Hi-Mid and High frequency Outputs.

The Hi-Mid control is inactive in 3-Way Mode. Refer to ‘Select Crossover Frequencies’ on page Manual-4.

5

Hi-Mid Output CD HORN EQ and engage switches:

When the switch is pressed to the in position, the CD Horn EQ is active

when the AC 24 is in 4-Way mode. If CD Horn EQ is not required, make sure the HORN EQ filters are off and frequency settings

are at 8 kHz. Refer to ‘Set CD Horn EQs’ on page Manual-7.

6

High Output CD HORN EQ and engage switches:

When the switch is pressed to the in position, the CD Horn EQ is active. If

CD Horn EQ is not required, make sure the HORN EQ filters are off and frequency settings are at 8 kHz.

7

Output LIMIT controls and indicators:

These are Thresholds for each of the Output Limiters, with a range of 0 to -64 dBFS. To

maintain spectral accuracy, Mid, Hi-Mid and High frequency Outputs are linked, so that any signal that crosses a Threshold will

limit all three Outputs equally (see 8). The independent Threshold indicators show which band is the source of the limit condition.

Refer to ‘Setting Limiters’ on page Manual-8.

8

Low Output LIMITER LINK switch:

The Limiter for the Low Output is independent of the Mid, Hi-Mid and High frequency

Output Limiters. This is often desirable to prevent “pumping” or modulating higher frequencies. Depressing this switch “links” the

Low Limiter to the other limiters. Refer to ‘Set Limiters’ on page Manual-8.

9

Low, Mid, Hi-Mid and High Output DELAY controls

: Add from 0 to 10 ms of signal Delay to each of the Crossover Outputs

(10 ms = 135 inches = 11.313 feet = 3.429 meters). This allows a driver to be electronically phase-aligned with a driver whose dia-

phragm is situated behind the other. Refer to ‘Adjust Signal Delay’ on page Manual-5.

0

STEREO LINK switch:

This switch links CHANNEL A as the MASTER to CHANNEL B as the SLAVE, useful in stereo ap-

plications. In this mode, the MASTER (A) controls all of the SLAVE’s (B) DSP functions, leaving Channel B’s controls inactive.

When using the Stereo Link, we recommend setting the SLAVE (B) Outputs to minimum. This prevents unwelcome surprises if the

STEREO LINK switch is turned off.

q

MONO LOW Output switch:

Sums the Outputs of Channels A and B, appearing at the Channel A LOW Output.

w

POWER indicator:

When this yellow LED is lit, you guessed right — the unit is on and ready.