The requirements imposed upon modern power amplifiers are enormous: they are expected to combine very high power, minimal weight, outstanding audio performance, absolute reliability,

remote monitoring and control, and networking.

In order to realize power levels of 2500 W / 4 Ω, power amplifiers must be able to supply peak output voltages between 180 V and 200 V. This requirement limits the number of plausible topologies to two:

Class D and Dynacord's Linear Grounded Bridge Class-H.

After extensive research, the Dynacord engineering department decid- ed against the use of Class D designs: the besetting evils of Class D technology – primarily, distortion and a clear load-dependence in the frequency response – cannot be overcome, even by modern designs, and the result is an un-wanted discoloration of the output signal.

Linear push-pull designs with Class-H topology are acceptable solu- tions for output levels up to 1500 W / 4 Ω and are used in many Dynacord power amplifiers. The limitation of the Class-H push-pull approach is the 250 V specification of typical audio power transistors and their second breakdown restrictions. Even exceeding the speci- fied peak voltage or the second breakdown limit for a short period leads directly to failure of the power transistors and the power ampli- fier. The use of exotic 350V-specified transistors presents no reliable solution in view of their second breakdown behaviour, their perform- ance and also their availability.

Higher power classes require different solutions! Dynacord's Linear Grounded Bridge designs (e.g. L 2400/P3000) have proven extreme- ly reliable over many years as well as outstanding in terms of audio performance. One of the key advantages of Grounded Bridge solu- tions is the considerable reduction in 'voltage stress' for the power transistors. This permits the design of high-power power amplifiers with peak output voltages in excess even of 200 V. A logical step in the direction of lowering power dissipation while increasing the out- put power at the same time was the development of a linear Grounded Bridge topology using Class-H technology with a three- stage switching, floating power supply. The use of an extremely sta- ble switching power supply makes a decisive contribution to the very low weight of these power amplifiers: 7 kW packed into 2 rack- spaces and weighing less than 15 kg!

PowerH power amplifiers are ready for integration into IRIS-Net™- based audio systems and networks. Retrofittable remote control modules, e.g. the RCM-26, make possible complete system supervi- sion and remote control combined with digital controller functions including ultra-precise FIR filters and optimised loudspeaker protec- tion algorithms

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Dynacord PowerH Series manual Remote monitoring and control, and networking
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PowerH Series specifications

The Dynacord PowerH Series is an exceptional line of powered loudspeakers designed to meet the rigorous demands of professional audio environments. Built for performance, this series is particularly favored for live sound applications, installation settings, and dynamic performances. The PowerH Series combines cutting-edge technology with impactful sound engineering, providing a solution for sound technicians and performers alike.

At the core of the PowerH Series is its robust, high-performance amplification system. Each speaker is equipped with a state-of-the-art Class D amplifier, ensuring high efficiency and minimal distortion at elevated volume levels. This allows the system to deliver clear, powerful sound across various frequency ranges, from thumping bass to crisp high frequencies. The amplifier is matched perfectly with custom-designed transducers, contributing to the series' remarkable frequency response and dynamic range.

One of the standout features of the PowerH Series is its intelligent DSP (Digital Signal Processing). This technology optimizes the speaker's performance in real time, enabling intelligent loudspeaker management including FIR filtering, which ensures minimal phase distortion. Additionally, the DSP offers various pre-set modes tailored for specific applications such as live sound, playback, and more. Users can also customize settings through a user-friendly interface, making it easy to adapt the speakers to different acoustic environments.

Moreover, the PowerH speakers are built ruggedly, with a durable wooden enclosure that not only enhances visual appeal but also improves resonance control. The robust construction ensures that the speakers can withstand the rigors of touring and installation use. Lightweight and easy to transport, they feature ergonomic handles that allow for simple maneuverability.

Connectivity options are plentiful, including XLR, TRS, and RCA inputs which make it easy to interface with mixers, amplifiers, and other sound gear. The series also includes comprehensive output options for linking multiple speakers, facilitating scalable sound setups for larger venues.

In conclusion, the Dynacord PowerH Series exemplifies a blend of innovative technology, practical design, and superior sound quality. Whether for a concert stage, corporate event, or installation in a venue, these powered loudspeakers are engineered to deliver remarkable audio experiences, setting a standard in the professional audio industry. With their advanced features and reliable performance, the PowerH Series continues to be a favored choice among audio professionals worldwide.
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