FAQ
  1. How to minimize power losses and provide a sufficient damping factor (DF) for low frequency drivers?
  2. What is the use of two connectors in one loudspeaker?
  3. What are the different types of Audio Signal Connections?
  4. Why am I getting partial sound / some frequency bands are missing?
  5. Why is the sound distorted?
  6. Why is there no sound output?
  7. How to maintain and operate devices?

How to minimize power losses and provide a sufficient damping factor (DF) for low frequency drivers?

To minimize power losses and provide a sufficient damping factor (DF) for low frequency drivers, use loudspeaker cable with conductor sizes per the following chart. For cable lengths over 200 feet at 8 ohms and over 100 feet at 4 ohms, the conductor sizes needed for an adequate damping factor are rarely practical for physical and cost reasons. For these situations, 10 AWG / 25 metric gauge are recommended as the most practical sizes.

The unit has been built by Nox Audio in accordance with IEC 60065 and left the factory in safe working order. To

maintain this condition and ensure non-risk operation, the user must follow the advice and warning

comments found in the operating instructions. The unit conforms to Protection Class 1 (protectively

earthed).

  • Nox Audio ONLY GUARANTEE THE SAFETY, RELIABILITY AND EFFICIENCY OF THE UNIT IF:
  • Assembly, extension, re-adjustment, modifications or repairs are carried out by Nox Audio or by persons authorized to do so.
  • The electrical installation of the relevant area complies with the requirements of IEC (ANSI) specifications.
  • The unit is used in accordance with the operating instructions.
  • The unit is regularly checked and tested for electrical safety by a competent technician.

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What is the use of two connectors in one loudspeaker?

If the loudspeaker has two connectors for the same mode of operation, they are wired in parallel so you can daisy chain multiple loudspeakers together to a single amplifier channel.

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What are the different types of Audio Signal Connections?

The input connector on the loudspeaker will be one of the following types with the pin connections as listed. Because of possible production changes, check the input panel labelling to verify proper connections. For barrier strips, the proper connections are marked for each terminal on the loudspeaker input label.

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Why am I getting partial sound / some frequency bands are missing?

 

  1. Incorrect EQ settings in the electronic equipment. Ensure all EQ settings and filters on the mixing console or pre-amplifier and on other equipment are set for normal operation. Ensure level controls on electronic crossovers and associated amplifiers are correctly set and that all cables and connections for such equipment are working properly.
  2. Incorrect processor configuration. Make sure the processor configuration is correct for the loudspeaker and its intended mode of operation. 
  3. Incorrect mode switch setting on the loudspeaker input panel. Ensure this switch is set for the operating mode you are using: single, bi-amplified or tri-amplified.
  4. Driver(s) not working properly. Contact Nox Audio Service for appropriate troubleshooting. 
  5. The crossover network inside the loudspeaker is not working properly. Contact Nox Audio Service for appropriate troubleshooting.

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Why is the sound distorted?

  1. The power amplifier is clipping. The signal level is exceeding the limits of your system and you must reduce the level.
  2. Other electronic equipment is clipping. Ensure that no equipment in the signal chain is being overdriven. For example: input(s) or summing bus in the mixing console, equalizers, etc.
  3. Driver(s) not working properly. Contact Nox Audio Service for appropriate troubleshooting.

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Why is there no sound output?

  1. Loudspeaker cables or connectors are mis-wired or faulty. Check all cabling. Refer to these instructions for correct loudspeaker cable connections. The best way to check a suspect cable is to swap it with a known good cable. Read the loudspeaker input panel to verify correct cable connections.
  2. Electronic equipment is not turned on or level controls are not adjusted properly. Make sure that all equipment in the signal path is powered up and that all controls are set to appropriate levels for normal operation.
  3. Loudspeaker is not working. Connect the loudspeaker cable to a known good loudspeaker leaving all equipment set to the same levels. If the problem disappears, the loudspeaker is probably not working. Contact Nox Audio Service for appropriate troubleshooting.

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How to maintain and operate devices?

  • DO NOT drive any of your electronic equipment into clipping, particularly the power amplifiers. This can easily damage the loudspeaker.
  • If driven into clipping, even the amplifier with a power output rating lower than Nox Audio power rating can cause damage to a loudspeaker.
  • Avoid sustained microphone feedback. This can quickly cause failure of mid and high frequency drivers.
  • Avoid extreme boosts on equalizers as these can cause excessive input to the drivers at the boosted frequencies. Generally, cutting frequencies is preferred to correct for frequency response problems. These problems include attenuating feedback frequencies or reducing excessive energy at certain frequencies due to room acoustics.
  • With appropriate signal processing, your loudspeaker should produce exceptionally good sound. If used in a room with problematic acoustics, there is little you can do to overcome room problems with electronic adjustments. Your best solution is careful placement and aiming of the loudspeaker so that most of the sound is directed only at the audience.
  • Nox Audio loudspeakers are capable of sound levels that can be damaging to human hearing. Take precautions so that audiences are not exposed to such levels. If you must expose yourself to these kinds of volume levels, wear adequate hearing protection. 
  • Take care when moving or lifting the loudspeaker. Injury to you or damage to the loudspeaker can result from careless handling.

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