8.Enhanced application field

8.1Standard input module NRS 90225

This input module for the power amplifiers DPA 4120 and DPA 4140 is meant for insertion at the power amplifiers' rear. It provides the following functions:

lockable XLR input connector

XLR output connector; to patch the input signal through

gain control; to be adjusted using a screwdriver

mains remote ON/OFF

battery remote ON/OFF

control of the D- and E-relays

fault messages via the READY relay contact:

-thermal overload of the mains transformer

-thermal overload of the power amplification stage

-ground fault (optional; only with installed NRS 90224)

-pilot tone signal (optional; only with installed NRS 90224)

MONITOR output; electronically balanced

input transformer for floating, balanced input; optional

output transformer for floating, balanced monitor output; optional

The input module is meant to be used with the power amplifiers DPA 4120 and DPA 4140. The module allows to control and monitor the operation of the power amplifiers using conventional equipment or (with reservations) by the PROMATRIX manager DPM 4000.

Caution: Before installing the input module NRS 90225, you have to unplug the mains connector as well as a presumably connected battery cord.

Before installing the input module, it is necessary to remove the two locking screws B on the rear panel of the appliance. For installation the printed board assembly first has to be inserted into the guiding rails. After carefully pushing the module in it has to be locked by using the two screws mentioned before.

Note: Functioning changes in the models DPA 4120 (starting with serial numbers: 100 11) and DPA 4140 (starting with serial numbers: 100 11) in association with the input module NRS 90225: To achieve reliable attenuation of switching noise (knacks), the monitor output stays muted as long as the READY-relay is not pulled. Because of circuit design reasons this causes that the monitor output is also muted even when a ground-fault appears at the main output.

8.2Remote module NRS 90222

This input and remote module for the power amplifiers DPA 4120 and DPA 4140 is meant for insertion at the power amplifiers' rear. It provides the following functions:

lockable XLR input connector

XLR output connector; to patch the input signal through

input level; can be set via a programmable audio level control

MUTE (via level control)

mains remote ON/OFF

battery remote ON/OFF

control of the D- and E-relays

surveillance and fault messaging via the PROMATRIX manager DPM 4000 corresponding to IEC 849

-thermal overload of the mains transformer

-thermal overload of the power amplification stage

-ground fault (optional; only with installed NRS 90224)

-pilot tone signal (optional; only with installed NRS 90224)

-measurement of the output voltage / level

-measurement of the output current

-surveillance of the connected loads via current/voltage measurement

MONITOR output; electronically balanced

monitoring: input/output signals can be assigned to the monitor bus

input transformer for floating, balanced input (optional)

output transformer for floating, balanced monitor output (optional)

pilot tone signal ON/OFF (optional)

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Dynacord DPA 4140, DPA 4120 owner manual Enhanced application field Standard input module NRS, Remote module NRS

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.