Rane AC 24 User Manual download pdf (Page 8)

Manual-6

5. Set the Delays starting with the driver furthest back (the one

that gets zero delay) and work outward (see Figure 4).

6. Hi-Mid / High Delay alignment:

a. Place the RTA mic in Position 1 as shown in Figure 4.

b. Set reference level for AC 24 High Output:

i) UnMUTE the High Output.

ii) Adjust the High Output LEVEL control so that an

adequate pink noise level is present.

iii) Adjust the High Output LEVEL so the RTA LED,

at the Hi-Mid / High crossover frequency, is green.

iv) MUTE the High Output.

c. Set reference level for AC 24 Hi-Mid Output:

i) UnMUTE the Hi-Mid Output.

ii) Adjust the Hi-Mid Output LEVEL so the RTA LED,

at the Hi-Mid / High crossover frequency, is green.

d. Set the High Output DELAY:

i) Referring to Figure 4, note the Hi-Mid Output is the

furthest back and requires no delay.

ii) UnMUTE the Hi-Mid and High Outputs.

iii) If the level goes down, driver polarity may be wrong.

Check the driver polarity before proceeding.

iv) Adjust the High Output DELAY for maximum

signal level in the RTA band associated with the

Hi-Mid / High crossover frequency.

7. Mid / Hi-Mid Delay alignment:

a. Place the RTA mic in Position 2 as shown in Figure 4.

b. Set the reference level for Hi-Mid Output:

i) UnMUTE the Hi-Mid Output.

ii) Adjust the Hi-Mid Output LEVEL so the RTA LED,

associated with the Mid / Hi-Mid crossover frequency,

is green.

iii) MUTE the Hi-Mid Output.

c. Set the reference level for the Mid Output:

i) UnMUTE the Mid Output.

ii) Adjust AC 24 Mid Output Level so the RTA LED,

associated with the Mid / Hi-Mid crossover frequency,

is green.

d. Set Mid Output Delay:

i) Referring to Figure 4, note that the Hi-Mid Output

is the furthest back and requires no delay.

ii) UnMUTE the Mid and Hi-Mid Outputs.

iii) If the level goes down, driver polarity may be

wrong. Check the driver polarity before proceeding.

iv) Adjust the Mid Output Delay for maximum signal

level in the RTA band associated with the Mid / Hi-Mid

crossover frequency.

8. Low / Mid Delay alignment:

a. Place the RTA mic in Position 3 as shown in Figure 4.

b. Set the reference level for the Mid Output:

i) UnMUTE the Mid Output.

ii) Adjust the Mid Output LEVEL so the RTA LED

associated with the Low / Mid crossover frequency is

green.

iii) MUTE the Mid Output.

iii) Record the Low / Mid crossover frequency.

iv) MUTE the AC 24 Low Output.

d. Unmute AC 24 Hi-Mid output.

i) e 1

low-side –6 dB red LED on the RTA

indicates the Mid / Hi-Mid crossover frequency.

ii) Adjust the MID / HI-MID Frequency to just light

the 1

low-side –6 dB red LED closest to the desired

crossover frequency.

iii) Record the Mid / Hi-Mid crossover frequency.

iv) e 1

high-side –6 dB red LED on the RTA

indicates the Hi-Mid / High crossover frequency.

v) Adjust the HI-MID / HIGH Frequency to just

light the 1

high-side red LED closest to the desired

crossover frequency.

vii) Note the Hi-Mid / High crossover frequency.

e. MUTE all AC 24 Outputs.

f. Set All AC 24 Output LEVEL controls to minimum.

4. Connect the Crossover to the Ampliﬁers:

a. Ampliﬁers oﬀ.

b. Connect Crossover Outputs to appropriate ampliﬁers.

c. If you have gain controls on your amps, set these for the

desired sensitivity (input voltage required to clip the amp).

d. Do not adjust ampliﬁer sensitivity controls after you have

set crossover Output Levels.

e. Place the RTA microphone about 24 inches [60 cm] away

from the speaker stack, as close to equidistant to each driver

as possible (see Figure 4).

f. Set the RTA scale to 1 dB if available.

i. Turn on the RTA Pink Noise.

j. Turn on the ampliﬁers.

11"

15.5"

24"

POSITION 1

HI-MID = 0 ms DELAY

HIGH = 1.14 ms DELAY

MID = 0.81 ms DELAY

LOW = 0.663 ms DELAY

POSITION 2

POSITION 3

(61 cm)

(22.9 cm)

(27.94 cm)

(39.4 cm)

0 10 ms

mic

Figure 4. Delay setttings calculated using furthest driver as zero.

1 2 3 4 5 6 7 8 9 10

Comments to this Manuals

No comments

Rane AC 24 User Manual Page 8

Comments to this Manuals

Related products and manuals for Audio Rane AC 24