The Klark Teknik KT-DN3600 is an industry-standard, digitally controlled two-channel programmable graphic equalizer designed for professional recording, broadcast, and live sound reinforcement. It bridges the gap between classic analog sound and modern digital precision by utilizing proprietary "MELT" hybrid filter circuits that provide exceptional headroom and dynamic range while offering the convenience of instant recall. The unit features two independent channels of 1/3-octave equalization across 30 bands, which can be operated separately or linked for stereo applications, making it a highly versatile tool for tuning complex acoustic environments.

The user interface is centered around a large, backlit "Supertwist" LCD display that provides a virtual representation of a conventional graphic equalizer, allowing for rapid and intuitive adjustments. Beyond the standard 30-band EQ, the DN3600 incorporates additional high-precision filtering tools, including sweepable high-pass and low-pass filters, as well as two variable-frequency notch filters per channel with a 1/12-octave width for surgical frequency removal. It also includes "Auto gain-ranging" technology, which automatically scales the gain of individual bands to maintain safe working headroom and prevent accidental clipping during aggressive boost or cut maneuvers.

For large-scale system integration, the DN3600 features 66 internal memories for storing complete equalizer programs with soft crossfading between settings for seamless transitions. Its robust connectivity includes a professional MIDI interface that allows a single master unit to control up to 64 slave units (such as the DN3601). The system also provides failsafe relay bypass, ensuring that the signal path remains intact in the event of power loss, and a specialized 16-pin connector for direct integration with the DN60/DN6000 Real Time Spectrum Analyzers for automated room equalization.