CARVIN XP4 User Manual

DELAYED LOUDSPEAKERS
DELAYED LOUDSPEAKERS
15
USING THE XP TO CORRECT DISTANCES IN LOUDSPKEAR PLACEMENTS
In a large sound system as seen at many stadiums or ampitheaters, there is usually a second set of loudspeakers that are
used to cover the back or distant seats. Since the sound from these speakers will reach the listener’s ear faster than the
sound coming from the stage, a time delay must be used to correct for the physical distance between the two speaker
systems. Without this time delay, the sound may sound cluttered and undefined. With the proper time delay, all audio
will arrive simultaneously and sound more intelligable and clearer.
Delay time is determined by the distance between your main stage loudspeakers and the rear speakers in direct relation
to the amount of time it takes sound to travel. Sound travels at a rate of 1.086 ft per millisecond therefore you will need a
1ms delay for every 1.086 feet. Use this simple formula to calculate delay time:
∆ = The delta is the distance in feet between the main speakers and secondary speakers.
1.086 = constant velocity of sound in ft per millisecond (ft/ms)
ms delay = the delay value in milliseconds that will be applied to the delay speakers.
example: ∆=250ft (distance between speakers) Divide 250 by 1.086. The result is a 230 ms delay
Next, set your XP to delay the signal with your calculated ms delay.
SET DELAY PARAMETERS
FRONT OF HOUSE SPEAKERS
REAR DELAY
SPEAKERS
Professional Amplifier Series
POWER
PROTECT
SIGNAL
CLIP
SIGNAL
CLIP
CHANNEL ONE CHANNEL TWO
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911
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2000 Watt Power Amp
DCM2000
Professional Amplifier Series
POWER
PROTECT
SIGNAL
CLIP
SIGNAL
CLIP
CHANNEL ONE CHANNEL TWO
1
2
3
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5
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911
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CHANNEL ONE CHANNEL TWO
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911
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CHANNEL ONE CHANNEL TWO
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911
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2000 Watt Power Amp
DCM2000
Professional Amplifier Series
POWER
PROTECT
SIGNAL
CLIP
SIGNAL
CLIP
CHANNEL ONE CHANNEL TWO
1
2
3
4
5
6
7
8
911
12
13
15
17
19
22
30
50
0 dB
10
1
2
3
4
5
6
7
8
911
12
13
15
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19
22
30
50
0 dB
10
CHANNEL ONE CHANNEL TWO
1
2
3
4
5
6
7
8
911
12
13
15
17
19
22
30
50
0 dB
10
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911
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CHANNEL ONE CHANNEL TWO
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2
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8
911
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22
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911
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2000 Watt Power Amp
DCM2000
ON
INPUT
CLIP
OUTPUT
EFF 1 EFF 2
EFF1 EFF2
BYPASS EFF2EFF1
STEREO
EDIT
VALUE
STEREO
5
4
3
2
1
010
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1
010
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SAVE
(SHIFT)
(COMPARE)
(GLOBAL)
XP2
TWO ENGINE DSP EFFECTS PROCESSOR
STAGE
∆ = distance between speakers measured in feet
Sound source is
delayed using
the XP to correct
for distance.
Rear speakers with time
delayed audio arrives at
the same time the front
of house audio arrives.
Power amps for
delay speakers
∆
–––– = ms delay
1.086
1. In Dual Mono mode select a delay effect program (80-89).
2. Edit the Effect Program with the following settings:
dL= ms delay value, Fr=1, Bo=1, rL=0, MIX=0. The signal will not regenerate into an echo with these settings.
Instead you will only get the delayed signal.

CARVIN XP4 Specifications

General

Brand	CARVIN
Model	XP4
Category	Recording Equipment
Language	English