Contents

 

Performance Features

23

 

Indicators, controls and connections

25

1.

Utilization

.....................................................................................................................................................

27

2.

Installation

27

3.

Before the first operation

27

 

3.1

Mains operation

27

 

3.2

Battery operation 24V DC

28

4.

INPUT

28

5.

Outputs

29

 

5.1

POWER OUTPUT

29

 

5.2

POWER OUTPUT for 100V (70V or 50V) loudspeaker systems

29

 

5.3

SINGLE CALL and obligatory reception relays OVERRIDE BYPASS

29

 

5.4

POWER OUTPUT for low impedance loudspeaker systems

29

 

5.5

MONITOR output

30

 

5.6

REMOTE CONTROL connector (only NRS 90225)

30

6.

Indicators

.....................................................................................................................................................

30

 

6.1

STANDBY indicator

30

 

6.2

READY indicator

30

 

6.3

PROTECT indicator

30

 

6.4

GROUND FAULT indicator

30

 

6.5

Aussteuerungskontrolle und CLIP-Anzeige

31

7.

Switching the output voltage

31

8.

Enhanced application field

32

 

8.1

General input module NRS 90225

32

 

8.2

Remote module NRS 90222

32

 

8.3

NRS 90208 input transformer for the floating, balanced input

33

 

8.4

NRS 90227 output transformer for the floating, balanced monitor output

33

 

8.5

NRS 90224 pilot tone and ground fault surveillance

35

 

8.5.1

Pilot tone surveillance

35

 

8.5.2

Ground fault surveillance

35

9.

19"-case and 19“-rack shelf system installation

38

10.

Ground lift switch CIRCUIT ATO CHASSIS SWITCH

38

11.

Fuses

38

 

11.1 Fuses in the DPA

38

 

11.2 Fuses in the DPA

38

12.

Power amplifier specifications

42

 

12.1 DPA 4120 power amplifier 200 W

42

 

12.2 DPA 4140 power amplifier 400 W

43

13.

Extension specifications

44

 

13.1 NRS 90225 general input module

44

 

13.2 NRS 90222 remote module

44

 

13.3

NRS 90208 input transformer for floating, balanced input

44

 

13.4

NRS 90227 output transformer for floating, balanced monitor output

44

 

13.5

NRS 90224 pilot tone and ground fault surveillance

44

14.

Block diagrams

67

 

14.1 Power amplifiers DPA 4120 / DPA 4140

67

 

14.2 NRS 90225 general input module

68

 

14.3 NRS 90222 remote module

69

 

14.4

NRS 90224 pilot tone and ground fault surveillance

70

15.

Warranty

72

26

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Dynacord DPA 4140, DPA 4120 owner manual Contents

DPA 4120, DPA 4140 specifications

The Dynacord DPA 4120 and DPA 4140 are powerful amplifier solutions designed for professional audio applications. These models are ideal for live sound reinforcement, permanent installations, and various audio distribution requirements.

Both DPA 4120 and DPA 4140 are part of the Dynacord DPA series, which is renowned for delivering high-quality sound and reliability in demanding environments. The DPA 4120 provides a robust 1200 watts of power per channel at 4 ohms, while the DPA 4140 ups the ante with an impressive 1400 watts per channel at the same impedance, making them suitable for driving a wide range of speaker systems.

One of the standout features of both amplifiers is the incorporation of advanced DSP (Digital Signal Processing) technology. This technology offers precise control over sound performance, allowing users to tailor settings to meet specific venue acoustics or personal preferences. The DSP includes functions such as equalization, crossover adjustments, delay, and limiting, ensuring optimal sound delivery in any setting.

Durability is another hallmark of the Dynacord DPA series. The amplifiers feature a rugged, lightweight design, ideally suited for touring and rental companies. The internal architecture includes a sophisticated cooling system that allows for extended operation under high-demand conditions without overheating.

Both models are equipped with a range of connectivity options, including XLR inputs and Speakon outputs, facilitating seamless integration with various audio systems. The amplifiers support both analog and digital input sources, ensuring compatibility with modern audio setups.

In terms of sound quality, the DPA 4120 and DPA 4140 are engineered with low distortion levels and high efficiency, achieving high-performance audio output while maintaining clarity and detail across all frequencies. The amplifiers also feature a robust power supply that delivers consistent performance, even during peak use scenarios.

User-friendly controls and monitoring options are also inherent in the design of these amplifiers. An intuitive front panel interface allows for easy adjustment of settings, while LED indicators provide real-time feedback on performance and operational status.

In summary, the Dynacord DPA 4120 and DPA 4140 offer exceptional power, sound quality, and advanced features, making them excellent choices for audio professionals seeking reliable and powerful amplification solutions. Their combination of performance, durability, and versatility serves to meet the needs of various professional audio applications, solidifying their place in the competitive landscape of audio amplifiers.