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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.crestronwww.crestron.com/lega

.com/lega

.com/lega.com/legal/open

l/open

l/openl/open-

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sourcsource

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soft

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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

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: To prevent damage to system

components, ensure that the amplifier is powered

off prior to changing any DIP switch setting.

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 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

LoLo-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

GainGain

INPUT SENSITIVITY

INPUT SENSITIVITY INPUT SENSITIVITY @ 8 Ω

@ 8 Ω

@ 8 Ω@ 8 Ω

VpVpeak

eak

eakeak

VVRMS

RMS

RMSRMS dBu

dBu

dBudBu

CACA-

- - -

PWPWRSFT

RSFT

RSFTRSFT 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

CACA-

- - -

PWPWRSFT

RSFT

RSFTRSFT 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 DiagramConnection Diagram

3-way Loudspeaker Driven by One Amp Channel

2 ±

NL4

1±

2 ±

NL4

1±

DSP AMP

XOVER

DSP LINE OUTPUT #2

DSP LINE OUTPUT #1

CA-PWR T-SF 1604 INPUT

CA-PWRSFT-1604 OUTPUT

LOUDSPEAKER 1

LOUDSPEAKER 2

Produktspecifikationer

Varumärke:	Crestron
Kategori:	högtalare
Modell:	Vector CD1595
Vikt:	27800 g
Bredd:	700 mm
Djup:	700 mm
Förpackningens vikt:	33400 g
Förpackningens bredd:	530 mm
Djuppackning:	670 mm
Förpackningshöjd:	745 mm
Höjd (min):	1200 mm
Höjd (max):	1340 mm
Maximal viktkapacitet:	200 kg
Antalet hjul:	5 wiel(en)
Ramfärg:	Zilver
Antal per paket:	1 stuk(s)
Ergonomisk design:	Ja
siffra:	1
Rammaterial:	Aluminium
Färg botten:	Zilver
Produkter per pall:	12 stuk(s)
Typ produkt:	Gaming leunstoel
Tiltvinkelområde:	90 - 120 °
Hjulhjul:	Ja
Max användarvikt:	200 kg
Kraangat:	700 x 700 mm
Nackstöd:	Ja
Wieldiameter:	75 mm
Spelplattformar stöds:	Universeel
Grundmaterial:	Aluminium
Typ av stol:	Zitgedeelte van mesh
Färg på sätet:	Zwart
Typ av ryggstöd:	Netrugleuning
Ryggstödets färg:	Zwart
Armstöd:	Ja
Justerbart armstöd:	Ja
Armstödsjusteringstyp:	2D-armleuning
Inklusive racinghjul/flygläge:	Nee
Zitbreedte:	510 mm
Zitdiepte:	510 mm
Justerbart nackstöd:	Ja
Sitthöjd (max):	565 mm
Sitthöjd (min):	480 mm
Ryggstödsmaterial:	Mesh, Polyvinyl chloride (PVC)
Sitsmaterial:	Polyvinyl chloride (PVC)
lutningsjusteringar:	Ja
Gaslyftsklass:	4
Ryggstödets bredd:	500 mm
Armstödshöjd (min):	240 mm
Armstödshöjd (max):	280 mm