Klark Teknik DN360 Graphic Equaliser User Manual

Introduction

This manual provides comprehensive instructions for the Klark Teknik DN360 Dual 30 Band, 1/3 Octave Analogue Graphic Equaliser. Designed for professional audio applications, the DN360 features classic Proportional-Q equalisation for precise frequency response control, making it an essential tool for sound engineers and audio professionals. Please read this manual thoroughly before operation to ensure proper use and to maximize the performance and longevity of your unit.

Key Features

• Classic Proportional-Q equalisation for optimum control of frequency response
• 18 dB/octave low-cut filter per channel to eliminate unwanted subsonic frequencies
• 30 mm oil-damped precision faders with centre detent
• Channel bypass and graphic EQ scale selection switches
• Power-off bypass relays

Important Safety Information

Always observe the following safety precautions to prevent electric shock, fire, or damage to the unit:

• Power Supply: Connect the unit only to the specified AC voltage. Ensure the power cable is securely connected.
• Fuses: Replace fuses only with the same type and rating as specified on the unit (e.g., 5 x 20mm 1250mA/250V).
• Grounding: This appliance must be earthed. Do not defeat the grounding type plug.
• Moisture: Do not expose the unit to rain or moisture. Do not use near water.
• Ventilation: Ensure adequate ventilation. Do not block ventilation openings.
• Servicing: Do not attempt to service this unit yourself. Refer all servicing to qualified service personnel. No user-serviceable parts inside.
• Placement: Place the unit on a stable surface. Avoid placing heavy objects on the unit.

Setup and Connections

Front Panel Overview

This image displays the front panel of the Klark Teknik DN360. It features two identical channels, each with 30 precision faders for frequency adjustment, ranging from 25 Hz to 20 kHz. Each channel also includes an input level control, output level control, a bypass switch, and a graphic EQ scale selection switch (±6 dB or ±12 dB). An overload indicator LED is present for each channel.

Rear Panel Overview and Connections

This image shows the rear panel of the Klark Teknik DN360. It features balanced XLR input and output connectors for both Channel A and Channel B. The power input socket (AC ~ 50-60Hz, 15W) is located on the left, along with a signal ground lift switch. Important safety warnings regarding fuse replacement and earthing are also visible.

Connection Steps:

1. Power Connection: Connect the supplied AC power cable to the unit's power input on the rear panel and then to a suitable mains outlet.
2. Audio Input: Connect your audio source (e.g., mixer output) to the XLR INPUT connectors on the rear panel for Channel A and/or Channel B.
3. Audio Output: Connect the XLR OUTPUT connectors of the DN360 to your next audio device in the signal chain (e.g., amplifier, recording interface).
4. Ground Lift: If you experience hum or ground loop noise, try engaging the SIGNAL GROUND LIFT switch on the rear panel.

Operating Instructions

Basic Operation:

1. Power On: Ensure all connections are secure before powering on the unit.
2. Level Adjustment: Use the INPUT and OUTPUT LEVEL controls on the front panel to set appropriate signal levels. Aim for the signal to be strong without triggering the O/LOAD (overload) indicator.
3. EQ Adjustment: Use the 30 precision faders for each channel to boost or cut specific frequencies. The centre detent indicates a flat (0 dB) response.
4. Scale Selection: The SCALE switch allows you to select between ±6 dB or ±12 dB maximum boost/cut for the faders. Use ±6 dB for finer adjustments and ±12 dB for more dramatic changes.
5. Low-Cut Filter: Engage the 18 dB/octave LOW CUT filter switch to remove unwanted subsonic frequencies (e.g., rumble, stage noise) from your signal.
6. Bypass: Use the BYPASS switch to quickly compare the equalized signal with the original, unprocessed signal. The power-off bypass relays ensure signal continuity even if power is lost.

Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use abrasive cleaners or solvents.
• Storage: When not in use for extended periods, store the unit in a cool, dry place, away from direct sunlight and extreme temperatures.
• Fader Care: The oil-damped faders are designed for durability. Avoid excessive force when adjusting them.

Troubleshooting

• No Power:
  • Check if the power cable is securely connected to both the unit and the mains outlet.
  • Verify the mains outlet is active.
  • Check the fuse on the rear panel and replace if necessary with the correct type and rating.
• No Sound Output:
  • Ensure all audio cables are correctly connected to the INPUT and OUTPUT XLR ports.
  • Check the INPUT and OUTPUT LEVEL controls; ensure they are not set to minimum.
  • Verify that the BYPASS switch is not engaged if you expect an equalized signal.
  • Check the signal source and the device connected after the DN360.
• Distorted Sound:
  • Reduce the INPUT LEVEL to prevent the O/LOAD indicator from lighting up.
  • Ensure the faders are not set to extreme boost positions, which can cause clipping.
  • Check the signal levels of connected equipment.
• Hum or Noise:
  • Engage the SIGNAL GROUND LIFT switch on the rear panel.
  • Ensure all audio cables are balanced XLR cables.
  • Check for other electrical interference in the environment.

Technical Specifications

What's in the Box

• Klark Teknik Two channel, 30 band, 1/3 octave classic graphic EQ, 3U Rack Space

Warranty and Support

Klark Teknik products are built to the highest standards and come with a limited warranty. For detailed warranty information, product registration, or technical support, please visit the official Klark Teknik website or contact your local distributor. Keep your purchase receipt as proof of purchase for warranty claims.