The Klark Teknik DN370 is a professional 3U, dual-channel, 30-band, 1/3-octave graphic equalizer designed for demanding live sound, broadcast, installed sound, and studio applications. This particular unit has spent nearly all of its life rack-mounted in a smoke-free studio, has seen very little use, and has never been part of a rental inventory or subjected to the rigors of constant touring. It is fully functional and in excellent cosmetic condition, showing only a few very minor rack marks from installation.

Built upon Klark Teknik’s renowned proportional-Q filter technology, the DN370 delivers the smooth, transparent, and remarkably musical sound quality that has made Klark Teknik signal processors a trusted choice of professional engineers worldwide. Unlike many graphic equalizers that can become harsh, brittle, or phasey when making significant adjustments, the DN370 maintains the clarity, openness, depth, and natural balance of the original program material. It allows you to make substantial tonal corrections while preserving the musical integrity of the source, making it equally effective for system tuning and critical listening applications.

Building on the legendary DN360 platform, the DN370 expands Klark Teknik’s classic graphic EQ concept into a much more comprehensive system processor. Beyond its dual 30-band graphic equalizers, it incorporates sweepable high-pass filters, sweepable low-pass filters, and two fully variable notch filters per channel. This combination provides an exceptional range of filtering options—from broad system voicing and tonal shaping to the precise removal of feedback, loudspeaker resonances, and room anomalies with minimal impact on adjacent frequencies.

The proportional-Q graphic filters provide smooth, predictable equalization across the frequency spectrum, while the variable notch filters offer highly surgical correction when needed. Together they give engineers the flexibility to perform both musical equalization and precision system optimization without compromising transparency. With generous headroom, exceptionally low noise, and highly repeatable filter response, the DN370 inspires confidence in demanding professional applications.

Long-throw 45 mm oil-damped faders provide exceptionally smooth operation and precise, repeatable adjustment. The selectable ±6 dB or ±12 dB operating range allows either fine-detail system tuning or broader corrective equalization, making the DN370 equally comfortable in concert touring, houses of worship, performance venues, permanent installations, and professional recording facilities.

Features

• 3U rack-mount chassis
• Dual-channel, 30-band, 1/3-octave graphic equalizer
• Klark Teknik proportional-Q filter design
• Smooth, transparent, highly musical analog signal path
• 45 mm oil-damped precision faders
• Sweepable high-pass filters
• Sweepable low-pass filters
• Two fully variable notch filters per channel
• Selectable ±6 dB / ±12 dB operating range
• High-headroom, ultra-low-noise analog circuitry
• Independent bypass switching
• Balanced XLR inputs and outputs
• Rugged steel chassis built for years of dependable professional service

The DN370 combines transparent analog equalization with an exceptional variety of filtering tools in a single professional processor. Whether you’re voicing a concert PA, optimizing stage monitors, correcting room acoustics, or integrating high-quality analog processing into your system, it offers the precision, flexibility, and musicality that have made Klark Teknik one of the most respected names in professional audio.

The unit will be carefully packed for safe shipment, includes a standard IEC power cord, and is ready for many years of reliable service. Please review the photos for cosmetic condition, and feel free to contact me with any questions.