Christie LA3S User manual

Recommended
crossover and filter
settings
Christie Vive Audio systems are designed to use specialized crossover and filter settings for operation
in two-way bi-amplified, three-way tri-amplified, low frequency effects (LFE), surround high pass filter,
or bass management modes.
Use the following crossover and filter settings to ensure that your system is optimally configured.
Precautions
Keep the following points in mind when selecting the crossover and protection filter settings.
• Do not use any crossover or filter settings other than those listed, to avoid sub-optimal
performance and damage to equipment.
• Vive Audio subwoofers feature a vented box design, with extended bass shelf (EBS) tuning.
You must use a high pass protection filter, as specified in this document, to avoid operating
below enclosure tuning frequency and damaging drivers from over-excursion.
• When tuning a system, we recommend performing bulk equalization at the crossover,
balancing speaker and subwoofer output level to achieve the flattest response for the
environment and before any other equalization is applied to system.
Recommended crossover specifications
Use these specifications when selecting an electronic crossover/processor.
Specifications
Specification Description
Filter types Butterworth, Bessel and Linkwitz-Riley with a 24 dB/octave slope
Signal-to-noise ratio 105 dB (minimum), 115dB (optimal)
24 bit converters 48 kHz sample rate (minimum), 96 kHz (optimal)
Inputs/outputs Suitable number for speaker system configuration
Recommended crossover units
• Peavey Digitool Live
Recommended Crossover and Filter Settings Instruction Sheet 1
020-101405-04 Rev. 1 (06-2018)
Copyright © 2018 Christie Digital Systems USA, Inc. All rights reserved.

• Peavey Digitool MX16
• Peavey Digitool MX32
• DBX DriveRack PA+
• DBX DriveRack PA1
• DBX DriveRack 260
Recommended processors with internal crossover function included
• Dolby CP850 Atmos
• Dolby CP850 Base
LA series crossover settings
Select from the following crossover and filter settings for the LA series of speakers, depending on your
system and application.
•Bi-amped—LA1, LA2, LA3, LA4 + S115 or S215
•Tri-amped—LA5 + (2) S215
Bi-amp settings
Low frequency crossover
for subwoofer
High frequency crossover
for speaker
Relative level between speaker and
subwoofer
Subwoofers: S115 or S215
High pass filter: 4th order 24dB/
octave Butterworth at 25Hz
Low pass filter: 24 dB/octave
Bessel at 209Hz
Speakers: LA1, LA2, LA3, LA4
High pass filter: 24 dB/octave
Bessel at 111Hz
Low pass filter: Off (equal to 20
kHz on Digitool)
Relative levels between speaker and
subwoofer at electronic crossover outputs,
as a starting point, before any bulk
equalization adjustments are made:
• LA1 at 0 dB, with S115 at 0 dB
• LA2 at 0 dB, with S215 at -4 dB
• LA3 at 0 dB, with S215 at -4 dB
• LA4 at 0 dB, with S215 at 0 dB
For bi-amp systems, adjust the balance of low and high frequency crossover output levels to achieve
the flattest response for the audio system and environment before using any other equalization.
Tri-amp settings
Low frequency
crossover for
subwoofer
Mid-frequency
crossover for
speakers
High-frequency
crossover for
speakers
Relative level/delay
between speaker and
subwoofer
Subwoofers: (2) S215
High pass filter: 24dB/
octave Butterworth at
25Hz
Speaker: LA5 mid-input
High pass filter: 24 dB/
octave Bessel at 111Hz
Low pass filter: 24 dB/
octave L-R at 1.5kHz
Speaker: LA5 high input
High pass filter: 24 dB/
octave L-R at 1.5 kHz
Low pass filter: Off (equal
to 20 kHz on Digitool)
Relative levels between
speaker and subwoofers at
electronic crossover
outputs, as a starting
point, before any bulk
Recommended crossover and filter settings
Recommended Crossover and Filter Settings Instruction Sheet 2
020-101405-04 Rev. 1 (06-2018)
Copyright © 2018 Christie Digital Systems USA, Inc. All rights reserved.

Low frequency
crossover for
subwoofer
Mid-frequency
crossover for
speakers
High-frequency
crossover for
speakers
Relative level/delay
between speaker and
subwoofer
Low pass filter: 24 dB/
octave Bessel at 209Hz
equalization adjustments
are made:
• LA5 HF at 0 dB, 0.2
ms delay
• LA5 MF at 0 dB, 0 ms
delay
• (2) S215 at -3 dB, 0
ms delay
For tri-amp systems, adjust the balance of low, mid and high frequency crossover output levels to
achieve the flattest response for the audio system and environment before using any other
equalization.
LS series crossover settings
Select from the following crossover and filter settings for the LS series of speakers.
•Bi-amped—LS1, LS2
Speaker Low frequency crossover High frequency
crossover
Relative level between
speaker frequencies
LS1 High pass filter: 24 dB/octave
Butterworth at 30 Hz
Low pass filter: 24 dB/octave
Butterworth at 350 Hz
High pass filter: 24 dB/
octave L-R at 350 Hz
Low pass filter: None
LF: 0 dB
MF/HF: -2 dB to -4 dB
LS2 High pass filter: 24 dB/octave
Butterworth at 25 Hz
Low pass filter: 24 dB/octave
Butterworth at 350 Hz
High pass filter: 24 dB/
octave L-R at 350 Hz
Low pass filter: None
LF: 0 dB
MF/HF: -1 dB to -3 dB
Low frequency effects filter settings
For Low frequency effects (LFE) systems, use an in-band real-time analyzer method per SMPTE RP200
specifications.
High pass and low pass filter for LFE
subwoofer
Relative level between LFE subwoofer and
speaker
Subwoofers: S118 or S218
High pass filter: 24 dB/octave Butterworth at 20 Hz
Low Pass Filter: 24 dB/octave Bessel at 249 Hz
Per SMPTE RP200 specifications, LFE channel sound
pressure level (SPL): +10 dB above SPL of center
channel, measured in-band on an real-time analyzer,
SPL C weighted/slow response, at standard 2/3 room
length reference, after level/equalization adjustments
are made.
Recommended crossover and filter settings
Recommended Crossover and Filter Settings Instruction Sheet 3
020-101405-04 Rev. 1 (06-2018)
Copyright © 2018 Christie Digital Systems USA, Inc. All rights reserved.

High pass and low pass filter for LFE
subwoofer
Relative level between LFE subwoofer and
speaker
Approximately equal to LFE Channel SPL: +5 to +6 dB
above SPL of center channel, measured broadband, SPL
meter, C weighted/slow response, at standard 2/3 room
length reference, after level/equalization adjustments
are made.
Surround bass management crossover settings
For bass managed surround systems, adjust the balance of low and high frequency crossover output
levels to achieve the flattest response for audio system and environment, before using any other
equalization. The exception is Dolby Atmos surround systems, which do this automatically.
Speaker series Low frequency crossover for
subwoofer
High frequency crossover for
speaker
LA and LS Subwoofers: S115 or S215
High pass filter: 24 dB/octave Butterworth
at 25 Hz
Low pass filter: 24 dB/octave Butterworth at
80 Hz
Speakers: LA3S, LA3C, LA4S, LA4C, LA5S,
LS1S, LS2S, LS3S, LS4S, and LS5S
High pass filter: 24 dB/octave Butterworth
at 80 Hz
Low pass filter: Off (equal to 20 kHz on
Digitool)
Adjust the relative level of the speaker and subwoofer for the flattest response for the audio system
and environment that it is installed in.
For all Dolby Atmos system installations, the relative level between speaker and subwoofer is set
automatically by the Dolby provided calibration system.
In general, a subwoofer provides approximately +2.5 dB to +3 dB SPL of additional output used with a
surround speaker in a system.
Surround high pass filter settings (optional)
The LA series and LS series surround speakers can be used with full range input signals, or with bass
management.
However, when bass management is not used, we recommend using an optional high pass filter for
optimal efficiency and performance.
Speakers High pass filter Low pass filter
LA3S, LA3C, LA4S, LA4C, LA5S and
LA5C, as well as LS1S, LS2S, LS3S,
LS4S, and LS5S
24 dB/octave Butterworth at 40 Hz None
Technical support
Technical support for Christie products is available at:
• North and South America: [phone] or [email protected]
Recommended crossover and filter settings
Recommended Crossover and Filter Settings Instruction Sheet 4
020-101405-04 Rev. 1 (06-2018)
Copyright © 2018 Christie Digital Systems USA, Inc. All rights reserved.

• Europe, Middle East, and Africa: [phone] or [email protected]
• Asia Pacific: [phone] or [email protected]
Recommended crossover and filter settings
Recommended Crossover and Filter Settings Instruction Sheet 5
020-101405-04 Rev. 1 (06-2018)
Copyright © 2018 Christie Digital Systems USA, Inc. All rights reserved.