Contents | Dynacord DPA 4140, DPA 4120 guide

19	CIRCUIT ⊥ TO CHASSIS SWITCH	B locking screws INPUT MODULE
20	DC INPUT 24V = (battery)
21	IDENT ADDRESS switch
22	REMOTE CONTROL connectors
23	STATUS indicator

A locking screws power supply printed board


	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 ⊥ TO 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

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.