6.5Level meter and CLIP indicator

The green LED-indicators -13dB and 0dB (1) together with the red CLIP-LED (2) allow to monitor the output level, effectively avoiding overdrive conditions that lead to distortion and overload at the power outputs which could damage the connected loudspeaker systems.

-If the red CLIP-LED (2) shortly lights during program peaks, maximum non-distorted modulation is achieved.

-Continuous lighting or blinking of the red CLIP-LED (2) signals overdrive. In this case the input level has to be reduced.

-If the green LED indicator (1) does not light or is only briefly lit with the red CLIP-LED blinking at the same time, this signals the encountering of an overload or short-circuit condition at the output. In this case the impedance of the connected load has to be checked.

Caution During normal operation the red CLIP-LED should only light briefly and shortly!

7.Switching the output voltage (only to be performed by a qualified service technician!)

The DPA 4120 and DPA 4140 amplifiers allow the connection of 50V, 70V, 100V or low-impedance loudspeaker systems (4 ohms). They are factory-preset to an output voltage of 100 V. Switching the output voltage to 4 ohms, 50V or 70V can be performed by changing the bridge B411 on the power amplifier printed board assembly 84187 (DPA 4120) or 84175 (DPA 4140):

Caution Before opening the appliance, make sure to disconnect the mains and/or battery power source!

-To open the appliance, the top panel has to be removed.

-The bridge B411 (yellow wire) has to be removed from the contact B407 and re-attached to the desired contact (see table 1) (see also figure 8 respectively figure 9).

-he coding-bridges S405 and S406 for the output recognition have to be inserted according to the illustration in figure 5.

(the inserted coding-bridge is marked in black)

-The top panel has to be re-attached.

Note

By using a waterproof marker pen and after switching the output voltage, the newly set value

 

has to be marked in the filed "OUTPUT VOLTAGE" on the rear panel of the appliance.

 

 

output

bridge

 

B411 to

100 V

B407

70 V

B408

50 V

B409

4 ohms

B410

table 1 bridge B411 settings switching the output voltage

figure 5 coding-bridges S405 / S406 settings output recognition OUTPUT CONFIG

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 loudspeakers have to be installed in accordance to applicable security standards and regulations (see also paragraph 8.5.2).

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Dynacord DPA 4120, DPA 4140 owner manual Level meter and Clip indicator
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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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