Dynacord DPA 4140 Single Call and obligatory reception relays Override Bypass, Monitor output

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of 200W (connection impedance 50 ohms) with the DPA 4120, respectively 400W (connection impedance 25 ohms) with the DPA 4140. Connection is performed using the 100V output (17) (see also figure 3). In a few special cases it is also possible to operate the loudspeaker systems with 70V or 50V output voltage (see also paragraph 7).

Caution It is possible that during operation shock-hazard output voltages can be present at the POWER OUTPUT connector (>34V peak value). Thus, the connected loudspeaker groups have to be installed in accordance to applicable security standards and regulations (see also paragraph 8.5.2).

5.3SINGLE CALL and obligatory reception relays OVERRIDE BYPASS

Combined with the PROMATRIX manager DPM 4000 or other external controls it is also possible to transmit single or collective calls with obligatory reception; i. e. bridging of possibly existing volume controls of the loudspeaker systems. For details on how to connect the outputs, please refer to figure 3; for the connection of relays, please refer to paragraph 5.6 respectively the PROMATRIX handbook.

5.4POWER OUTPUT for low impedance loudspeaker systems

Switching the output to 4 ohms allows the connection of low impedance loudspeaker systems (4-16 ohms) (see also paragraph 7 and figure 3). Because of the occurring line attenuation, the distance between amplifier and loudspeaker system should not exceed 50m. Please make sure that the overall loudspeaker impedance does not decline a value of 4 ohms and that the stated power handling capacity of a single speaker system is not exceeded.

5.5MONITOR output

The MONITOR output (16) on the NRS 90225 allows the connection of an additional power amplifier for monitoring purposes. The low impedance output is electronically balanced, which offers the possibility to achieve cable lengths of up to 200 m. Connection is performed via the REMOTE CONTROL pin-connector strip (see also figure 4). For the remote control module NRS 90222, the MONITOR output is located on the REMOTE CONTROL connector (22). The PROMATRIX manager DPM 4000 switches the signal to the according the monitor channel. In case a floating output is required, the monitor output is prepared for retrofitting an output transformer; provided through the optional extension NRS 90227 (please also refer to paragraph 8.4).

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.

5.6REMOTE CONTROL connector (only NRS 90225)

The 15-pole sub-D REMOTE CONTROL pin-connector strip (16) provides several different control in-/outputs:

- Ground of the stand-by power supply

- negative pole grounded

- POWER REMOTE

- via contact to ground potential

- BATTERY REMOTE

- via contact to ground potential

- MONITOR output

- electronically balanced

- READY-message

- with floating contact

- Obligatory reception relay D-RELAY

- via contact to ground potential

- Single call E-RELAY

- via contact to ground potential

2⊥ STANDBY GROUND

3POWER REMOTE

4BATTERY REMOTE

5

D - RELAY

REMOTE CONTROL

6

E - RELAY

 

7

 

 

8

 

READY

15

9+ MONITOR

10- MONITOR

figure 4 connections on the REMOTE CONTROL pin-connector strip

6.Indicators

30

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Contents Power Amplifier DPA 4120 / DPA Performance FeaturesPage Indicators, controls and connections 12 aContents Installation UtilizationAmplifier has to be protected from Before the first operationBattery operation 24V DC InputPower Output for 100V 70V or 50V loudspeaker systems OutputsPower Output for low impedance loudspeaker systems Remote Control connector only NRSIndicators Single Call and obligatory reception relays Override BypassStandby indicator Ready indicatorProtect indicator Ground Fault indicatorEnhanced application field Standard input module NRS Remote module NRS NRS 90208 input transformer for the floating, balanced inputRe-insert the input module and tighten the locking screws B Pilot tone surveillance NRS 90224 pilot tone & ground fault surveillanceGround fault surveillance NRS 90 406 S 411 Checking the pilot tone surveillance function Checking the ground fault surveillance function Case and 19-rack-shelf system installationGround lift switch Circuit ⊥ to Chassis Switch Fuses Fuses in the DPA503 502 503 F 601 602 Battery operation DPA 4140 power amplifier 400 W Power supply NRS 90208 input transformer for floating, balanced input 13.5.2 Ground fault surveillanceExtension kits for the DPA 4120 and DPA
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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.
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