GROUND Lift Switch, Power On And Remote Control

CIRCUIT T TO

CHASSIS SWITCH

GROUNDED

UNGROUNDED

POWER

POWER REMOTE +

+24V ON

0V OFF

CH A

CH B

LIMIT

SIGNAL

PROTECT

POWER

GROUND Lift Switch

The ground lift switch helps is a perfect means for eliminating possible ground noise loops. In case the power amplifier is operated together with other equipment inside of a rack shelf system, the switch should be set to its GROUNDED position. When using the power amplifier together with other equipment that operates on different ground potentials, the switch should be set to UNGROUNDED.

Power On And Remote Control

When the power amplifier is operated via power remote start (standard ope- ration) an external 24 V power source has to be connected to the POWER REMOTE terminal strip and the mains switch has to be set to its OFF-positi- on. When correctly connected and with a present supply voltage, the power amplifier is operational. The fans run for approximately 2 seconds and the POWER ON-LED on the front panel lights. The mains switch POWER on the rear of the appliance bridges the mains relay. It is meant for service pur- poses only. This allows to operate the power amplifier without the presence of an external 24 V power source. The current consumption at the POWER REMOTE input is approximately 25mA.

Limit Indicator

The indicator lights whenever the integrated limiter is activated. While short blinking means no problem, the continuously lit LED indicates that the vo- lume level needs to be reduced to prevent the connected loudspeaker sys- tems from being damaged by overload.

The audio limiters are capable of controlling overdrive levels of up to 20 dB. Most other power amplifiers without integrated limiters begin to clip, generating nasty distortion that not only attacks your ears but also lead to damaging the connected loudspeaker systems by overload. The limiters are activated only in case of the occurrence of non-linear conditions within the power amplifier; e. g. signal clipping at the operation voltage limit. The limit- ers do not affect the power amplifier’s overall dynamic range.

Signal Indicator

This indicator is lit when the audio signal exceeds –30 dB. In case short- circuits resulting from broken loudspeaker cables are detected or one of the power amplifier’s protection circuits is activated, the signal indicator is dimmed.

PROTECT

The PROTECT-LED lights whenever one of the power amplifier’s protection circuits – thermal overload, RF, DC, Back-EMF – is activated. In PROTECT mode all loudspeaker lines and output transformers are disconnected via relays and the power amplifier’s audio inputs are short-circuited to prevent the connected loudspeaker systems from being damaged. When the power amplifier enters the PROTECT mode please examine first whether the appli- ance is overheated. If this is the case, the front and rear ventilation louvres are possibly covered, the nominal load impedance has fallen below the spe- cified minimum value, or a short-circuit occurred at the power output.

When switching the power amplifier on, the PROTECT-LED lights for appro- ximately 2 seconds. This is normal. It signals that the protection circuitry is in working order.

Power ON Indicator

This LED lights when the power amplifier is connected to the mains and its power switch is set to the ON-position. If the indicator does not light alt- hough the power amplifier is switched on, the appliance is not connected to the mains or the primary fuse is blown.

DPA 4260, DPA 4245 specifications

Dynacord, a renowned name in professional audio equipment, has established a reputation for delivering high-performance amplifiers that meet the rigorous demands of live sound and installation applications. The DPA 4260 and DPA 4245 models stand out in their lineup, featuring advanced technologies and robust characteristics that set them apart in the competitive audio landscape.

The Dynacord DPA 4260 is a powerful four-channel amplifier that offers an impressive output of up to 2,600 watts, designed to drive a wide range of speakers effortlessly. One of its main features is the implementation of a sophisticated DSP (Digital Signal Processing) technology, which provides comprehensive control over audio parameters such as EQ, crossover, delay, and limiter settings. This allows users to optimize the sound output for various environments, ensuring clarity and fidelity in the audio performance.

In addition to DSP, the DPA 4260 is equipped with an advanced Power Factor Correction (PFC) system. This technology not only enhances the amplifier's efficiency but also ensures stable performance even under varying load conditions. The amplifier's robust build quality and efficient heat dissipation design make it suitable for extended operation in demanding venues.

On the other hand, the Dynacord DPA 4245 is another impressive model offering a slightly lower output of 1,400 watts but packed with its unique set of features. Like the DPA 4260, it benefits from the same DSP capabilities, allowing for detailed sound manipulation and tuning. This is particularly useful for sound engineers looking for precision in their audio setups.

The DPA 4245 also showcases versatility in its operation, featuring a selection of operating modes to accommodate different configurations, including bridge mode for driving larger loads. Its lightweight design makes it easy to transport and install without compromising on power or performance.

Both models come with comprehensive connectivity options, ensuring compatibility with various audio systems and setups, facilitating seamless integration into existing infrastructures. The front panel allows for easy monitoring, featuring LED indicators that display operational status and signal integrity.

In conclusion, Dynacord's DPA 4260 and DPA 4245 amplifiers exemplify cutting-edge technology and robust construction in the world of professional audio. With their powerful outputs, advanced DSP capabilities, and flexible configurations, these amplifiers are designed to meet the demands of professionals seeking reliable and high-quality audio solutions in live sound reinforcement and installation applications. Whether for touring, installations, or events, these amplifiers ensure a professional sound experience.