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APPLICATION NOTE
DOC 8370A (2052535)
09.18
Certain Crestron products contain open source software. For specific information, visit
www.crestron
www.crestron
www.crestron
www.crestronwww.crestron.com/lega
.com/lega
.com/lega
.com/lega.com/legal/open
l/open
l/open
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-- -
-
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sourc
sourc
sourc
sourcsource
e
e
ee soft
soft
soft
softsoftware
ware
ware
wareware
.
Crestron, the Crestron logo, Avia, and Vector are either trademarks or registered trademarks of Crestron Electronics, Inc., in the UnitedCrestron States and/or other countries. Neutrik and
speakON are either trademarks or registered trademarks of Neutrik AG in the United States and/or other countries. Other trademarks, registered trademarks, and trade names may be used in
this document to refer to either the entities claiming the marks and names or their products. Crestron disclaims any proprietary interest in the marks and names of others. Crestron i s not
responsible for errors in typography or photography. ©2018 Crestron Electronics, Inc.
Page 1 8 of
Crestron Performance Audio Systems: Powersoft Amplifiers
Powersoft Duecanali and Quattrocanali power amplifiers— - - - -CA PWRSFT 1604 and CA PWRSFT 2404,
respectively—are designed to meet the high-power requirements of large audio systems. Both amplifiers offer
a range of applications from basic background music and paging, to larger sound reinforcement systems in
auditoriums, meeting places and other large gathering spaces.
These amplifiers are extremely versatile and may be used in low impedance performance systems. The
compact, 1 RU housing and supplied mounting rails for 19’’ racks simplify installation while addressing space
concerns. For high-impedance distributed systems, refer to Application Note (Doc. 8371) at
www.crestron.com/manuals.
For additional amplifier wiring and operational details, refer to the CA- - - - PWRSFT 1604 and CA PWRSFT 2404
product manual at www.crestron.com/manuals.
Connections
To accommodate a variety of applications each
amplifier includes several terminal block
connectors. Depending on the attached
loudspeaker, additional connectors may be required
for terminations at the loudspeaker end.
Configurations
Each channel on a Powersoft amplifier can be
independently configured for high-impedance
(Hi- - -Z) distributed systems or low impedance (Lo Z)
operation.
The amplifiers are configured for operations using
DIP switches on the rear panel. Additional DIP
switches configure High-Pass Filters (HPF) on each
channel.
WARNING:
WARNING:
WARNING:
WARNING:WARNING: To prevent damage to system
components, ensure that the amplifier is powered
off prior to changing any DIP switch setting.
NOTE
NOTE
NOTE
NOTENOTE:
:
:
:: Refer to the product manual for details on
wiring and additional DIP switch configurations.
Select Low Impedance Operation
All amplifier channels are
factory- -Z configured for Lo
operation. Additionally, the
high-pass filter is disabled
(HPF Off
HPF Off
HPF Off
HPF OffHPF Off) and the gain is set
to 32 dB. To set a channel for
low-impedance operation,
the channel mode switch
must be set to Lo
Lo
Lo
LoLo-Z
-Z
-Z
-Z-Z.
Set Gain
The CA- -1604 PWRSFT
and CA- -PWRSFT 2404
have four amplifier gain
settings. The gain level
is set from the GAIN
section of the CONFIG
DIP switches.
Depending on the
capabilities of the
headend equipment driving the amplifier, you may
choose to modify the amplifier’s input sensitivity.
Most contemporary audio systems include a DSP
upstream of the amplifier input. The DSP’s analog
output gain settings are configured to achieve
operational levels aligned with amplifier gain to
prevent the DSP or amplifier from distorting the
signal.
The amplifier should have sufficient Maximum
Power per channel to meet or exceed the
loudspeaker’s power rating.
APPLICATION NOTE
DOC 8370A (2052535)
09.18
Page 2 8 of
Using an amplifier that is too underpowered
relative to the loudspeaker’s power handling
capacity may result in a clipped signal. A clipped
signal creates harmonics, or DC voltages, that may
cause damage to connected loudspeakers or other
equipment.
To avoid clipping, set the DSP‘s Maximum Output
Level to a level that is greater than the amplifier’s
Maximum Input Level. In this case, the amplifier
would distort before the DSP’s digital- -to analog
converter is overdriven.
A good system design requires system components
configured for optimum gain when feeding the next
component downstream (also known as gain
staging). When configured correctly, this ensures
that the complete signal path from acoustic input
at the microphone- -to loudspeaker output (also
known as the system gain structure) is optimized.
To optimize gain staging with the amplifier, the
Crestron Avia™ s Audio tool include an Output Gain
object with level control that configure s the digital
level feed to the D/A converter. An analog gain
control is provided after the D/A converter for Full
Scale ( ) FS output to drive the amplifier input.
Crestron recommends a gain setting of 26 dB when
using Crestron Avia DSPs. Additional amplifier gain
settings are shown below for use with other DSPs.
Gain
Gain
Gain
GainGain
INPUT SENSITIVITY
INPUT SENSITIVITY
INPUT SENSITIVITY
INPUT SENSITIVITY INPUT SENSITIVITY @ 8 Ω
@ 8 Ω
@ 8 Ω
@ 8 Ω@ 8 Ω
Vp
Vp
Vp
VpVpeak
eak
eak
eakeak
V
V
V
VVRMS
RMS
RMS
RMSRMS dBu
dBu
dBu
dBudBu
CA
CA
CA
CACA-
-
-
- - -
-
-
--
PW
PW
PW
PWPWRSFT
RSFT
RSFT
RSFTRSFT 1604
1604
1604
16041604
26 5.7 4.0 14.2
29 4.0 2.9 11.2
32 2.9 2.0 8.2
35 2.0 1.4 5.2
CA
CA
CA
CACA-
-
-
- - -
-
-
--
PW
PW
PW
PWPWRSFT
RSFT
RSFT
RSFTRSFT 2404
2404
2404
24042404
26 4.9 3.5 13.0
29 3.5 2.5 10.0
32 2.5 1.7 7.0
35 1.7 1.2 4.0
APPLICATION NOTE
DOC 8370A (2052535)
09.18
Page 3 8 of
3- Way System Configuration,
Single Amplification
The following example shows a DSP- 1280 and
CA- -1604 2- PWRSFT channel amplifier driving two
3- s. way loudspeaker
Equipment List:
(1) C - restron Avia DSP 1280 12x8 Digital Signal
Processor
(1) CA- -1604 PWRSFT Powersoft Duecanali 1604,
2- Channel Power Amplifier
(2) Vector CD896 ™ Performance Loudspeakers,
Dual 8” 2- Way Coaxial + Low Frequency Drivers
(2) Two conductor speaker wires-
(2) Neutrik® NL4 loudspeaker connectors
The DSP 1280two balanced outputs of the - feed
the two inputs of the CA- -PWRSFT 1604 amplifier.
The amplifier’s outputs terminate to Neutrik
speakON® NL4 connectors at the loudspeakers. The
NL4 power ’s pair #1 ± terminals deliver to the
loudspeaker second . Each loudspeaker features a
NL4 connector ) (wired in parallel to provide a signal
pass-through to an additional loudspeaker.
Connection Diagram
Connection Diagram
Connection Diagram
Connection DiagramConnection Diagram
3-way Loudspeaker Driven by One Amp Channel
2 ±
NL4
1±
2 ±
NL4
1±
DSP AMP
HF
LF
LF
XOVER
DSP LINE OUTPUT #2
DSP LINE OUTPUT #1
CA-PWR T-SF 1604 INPUT
G
-
+
G
-
+
2+
2G
2-
1+
1G
1-

Produktspecifikationer

Varumärke: Crestron
Kategori: högtalare
Modell: Vector CD1565-RH

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