Dynacord Comprehensive Guide to DPA 4140 Setup and PROMATRIX Integration
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Output Transformer NRS 90227

figure 6 printed board assembly 81338 showing the input transformer NRS 90208 and the output transformer NRS 90 227

Input Transformer NRS 90208

Output Transformer 90 227

figure 7 printed board assembly 81339 showing the input transformer NRS 90208 and the output transformer NRS 90 227

8.5NRS 90224 pilot tone & ground fault surveillance

The extension NRS 90224 is meant for insertion. It includes a 19 kHz tone generator and a selective 19 kHz receiver with evaluation stage for pilot tone surveillance. Also incorporated is a monitoring circuit with fault storage and display driver, to guard the cable network connected to the output.

8.5.1 Pilot tone surveillance:

Integration of the extension NRS 90224 provides continuous self-monitoring of the amplifier. This gets accomplished in the way that an extremely low-level 19 kHz pilot tone signal is introduced to the signal path following the input level control LEVEL. After passing the amplifier stages, the pilot tone signal is filtered out at the output and the result is evaluated. If the measured signal declines the pilot tone's predetermined threshold at the output or is not present at all, the READY indicator (7) dims and the READY fault message relay drops. When using the INPUT MODULE NRS 90225, the fault message is output as collective fault message with the floating contact of the READY fault message relay via the REMOTE CONTROL connector (16). When using the REMOTE MODULE NRS 90222, error occurrence is monitored and output by the PROMATRIX manager DPM 4000 (for further details, please refer to the PROMATRIX handbook).

8.5.2 Ground fault surveillance:

When installing and operating 100V-loudspeaker networks, compliance to the VDE regulation DIN VDE 0800 is mandatory. Especially, if 100V-loudspeaker networks are included in alarm system applications, all security standards have to be in accordance to the security class 3 standard.

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Contents Performance Features Power Amplifier DPA 4120 / DPAPage 12 a Indicators, controls and connectionsContents Utilization InstallationAmplifier has to be protected from Before the first operationInput Battery operation 24V DCOutputs Power Output for 100V 70V or 50V loudspeaker systemsRemote Control connector only NRS Power Output for low impedance loudspeaker systemsIndicators Single Call and obligatory reception relays Override BypassReady indicator Standby indicatorProtect indicator Ground Fault indicatorEnhanced application field Standard input module NRS NRS 90208 input transformer for the floating, balanced input Remote module NRSRe-insert the input module and tighten the locking screws B Ground fault surveillance NRS 90224 pilot tone & ground fault surveillancePilot tone surveillance NRS 90 406 S 411 Checking the pilot tone surveillance function Case and 19-rack-shelf system installation Checking the ground fault surveillance functionGround 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 Extension kits for the DPA 4120 and DPA 13.5.2 Ground fault surveillanceNRS 90208 input transformer for floating, balanced input
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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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