Dynacord DPA 4260 Stereo Amplifier Manual

DESCRIPTION

Especially designed for permanent installations, the DPA-Series power amplifiers offer performance-con- sistent and reliable operation of PA-systems with 2 individual loudspeaker lines, each. Therefore, DPA-Series power amplifiers are most suitable for company intercom, alarm and background music transmission installations in offices and commercial areas, congregation and sport centers, schools, houses of worship, hotels, hospitals, shopping malls and super markets, cruise ships, and other similar applications.

Each power amplifier incorporates two high-performance output transformers. Next to 100 V, 70 V, and 25 V floating outputs, the direct outputs provide the possibility to also drive loudspeaker systems with low-impedance down to a minimum of 4 ohms. Simultaneous operation of low-impedance speaker systems and floating loudspeaker lines on a single output channel of the power amplifiers is possible as well.

The integrated 45 Hz LO-cut filter with 18 dB/oct. slope protects the connected loudspeaker lines from unwanted ultra-low frequencies.

Comparator circuitry constantly monitors the input and output signals of the power amplifiers and activates their internal limiters whenever non-linear operation is encountered which reliably protects the connected loudspeaker systems against overload conditions and clipping, saturation of the power supply transfor- mers, and overvoltage at the outputs. The DPA-Series power amplifiers’ transmission and sound qualities are absolutely superb. The employed comprehensive dimensioned power supply units with low-interfe- rence toroidal transformers ensure that the stated nominal performance specifications are accomplished, even in most demanding and critical installations. Since the DPA-Series power amplifiers do not employ V/I-Foldback-Limiter circuits, operation on complex loads up to ±90° phase angles is possible without a problem.

Quick optical information on the power amplifiers’ momentary operational status is provided through easily readable LED indicators, individually showing whether a channel is ready for operation, a signal is present at the output, if any of the limiter circuits and/or one of the protection circuits has been activated.

The inputs are electronically balanced and carried out as XLRF-type and as binding post clamping connectors as well. Parallel linking the two connector types at the input provides the possibility to utilize the carried-through signals to feed additional power amplifiers, without the necessity for special split-cab- les. Both inputs can be optionally retrofitted with input transformers. Through Input Routing switches it is possible to configure the DPA-Series power amplifiers for stereo, parallel-monaural, or bridged-mode operation.

The dB-scaled level controls – extremely precise and good to operate potentiometers – are located on the rear of the appliances. A Ground-Lift switch which helps eliminating ground noise loops by separating the amplifier circuit ground from the common ground of the enclosure is also to be found on the rear panels. Conveniently connecting the loudspeaker lines to the power amplifiers is provided through a binding post strip, where all voltages – 25 V, 70 V, 100 V – and the low-impedance output are present on individual screw-clamp connectors. The rear panel service mains switches allow turning the power amplifiers’ power on directly. Using the provided power remote input, remote-start is also possible.

Consistent thermal stability of the power amplifiers is obtained through extremely silent running fans which are automatically switched stepwise depending on the amplifiers’ operation mode. The front-to-rear air circulation guarantees trouble-free operation in rack-shelf enclosures of any size.

Several other features of the DPA-Series power amplifiers are revealed within this owner’s manual. Therefore, please take the time to carefully and entirely read the provided information.

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.