IED's DNA78x4 digital network

For over 30 years Innovative Electronic Designs has set the standard for large-scale audio and visual paging systems. IED is proud to announce the release of the DNA78x4 digital network, 4-channel power amplifiers. The DNA78x4 series amplifiers are an integral part of the IED GLOBALCOM Communications System.

The DNA78x4 series amplifiers are designed to allow the addition of up to 4 audio zones to an existing system. They feature CobraNet digital audio input and four channels of 200 watt amplification. The internal amplifier cards are Class D (switching mode) dual channel 200W amplifiers into the rated loads (70.7 Volts into 25Ω or 100 Volts into 50Ω). Class D operation, combined with an integral switching mode power supply, offers many advantages, and the unique IED design makes full use of these benefits. They include higher efficiency, increased reliability, improved performance, and lower cost. Switching mode operation combined with high voltage power MOSFET devices make it possible to eliminate the heavy, costly, bulky transformers. IED's design is stable under all load conditions. The amplifier card has 34dB of gain from its analog input to the loudspeaker output. Attenuation is handled ahead of the power amplifier by DSP controls through software. The power amplifier has built-in voltage limiting to protect the loudspeakers being driven. In addition, a temperature sensor on the heat sink will automatically shut the amplifier during an excessive thermal event.

Each model features front panel LED indicators that reference channel power, audio signal, and fault statuses. Both 120V and 240V models are available. The DNA78x4 amplifiers are controlled with network commands for selecting input routing and configuring EQ, delay and output levels. Amplifiers may be controlled by a stand-alone GLOBALCOM configuration utility or through the GLOBALCOM System Management Center.