Crestron Powersoft CA-PWRSFT-1604 Application Note

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: To prevent damage to system
components, ensure that the amplifier is powered
off prior to changing any DIP switch setting.
NOTE: Refer to the product manual for details on
wiring and additional DIP switch configurations.
Certain Crestron products contain open source software. For specific information, visit www.crestron.com/legal/open-source-software.
Crestron, the Crestron logo, Crestron Avia, and Vector are either trademarks or registered trademarks of Crestron Electronics, Inc., in the United 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 is not
responsible for errors in typography or photography. ©2018 Crestron Electronics, Inc.
Select Low Impedance Operation
All amplifier channels are
factory-configured for Lo-Z
operation. Additionally, the
high-pass filter is disabled
(HPF 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-Z.
Set Gain
The CA-PWRSFT-1604
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 1 of 8