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General Features

The DX series microphone modules have 3 channels, though they allow connecting up to 5 microphones on their rear panel. ⟶ Channels MIC-2 and MIC-3 can handle two microphones each, as they have dual inputs (MIC-2/MIC-4 and MIC-3/MIC-5 respectively). ⟶ When two microphones are used on the same fader, the level and gain are identical for both. ⟶ The compressor action can compensate for level differences between microphones up to 12/15 dB. The DX822 model has two 3-microphone modules. It handles 6 microphone faders and accepts up to 10 microphones (4 dual inputs). 816 Panel Mics Pn
  1. Gain preset. Should be adjusted so the fader operates above the OVL (–30 dB) overload mark. ⟶ Operating below this level causes unnecessary amplification, resulting in peak clipping. ⟶ The ideal is to work with the fader within the optimal zone (–10 to –20 dB).
  2. Phantom 48V power. Activated/deactivated for all module inputs.
Dynamic microphones can be safely connected to inputs with phantom 48V, as their internal transformer decouples the DC voltage.
  1. EQ. Enables/disables equalization for all microphones in the module.
  2. EQ. Gain controls for the frequency bands.
  3. BUSES: Assignment to PGM and REC output buses. Microphones are assigned collectively to PGM, REC, or both. Assignment is post-EQ.
  4. CUE: Sends the pre-fader signal to the CUE circuit. Activated per channel.
  5. Operating zone: This area indicates the correct working position for nominal signal level and proper input gain adjustment.
    The gain should be adjusted so the fader operates above -30 dB. The OVL (9) indication shows overload, meaning excessive input gain.
  6. Main fader. Adjusts the signal level in the mix. In addition to raising the faders, the MASTER MIC button located to the right of the faders must be pressed to enable the microphones.

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Equalization

The equalization is global and affects all microphone channels. The purpose is to allow general equalization adjustments that respond to the room’s acoustic characteristics, which are common to all microphones. EQ Features:
  • Bands 1 and 4 (low/high frequencies): in Shelving mode, range ±15 dB.
  • Band 2: Peak EQ. Centered at 160 Hz. Can soften the “popping” effect.
  • Band 3: Centered at 6.3 kHz. Can soften the “sibilance” effect and sibilant sounds.
816 Eq Curves Pn

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Compression

The dynamic compressor reduces large level variations in microphones.
The design avoids audible artifacts and simplifies operation. Simply raise the microphone fader levels until the VU meters reach the red zone.
  • Acts on the microphone channel mix.
  • Cannot be disabled.
  • Engages when the signal exceeds 0 VU.
  • Below this level, the signal is unaffected.
  • Compression ratio: 10:1, with fast attack and release times.
  • The compressor will reduce gain by a value indicated on the MIC Compressor meter.
  • Compression values of 5 to 15 dB are optimal when operating multiple microphones simultaneously.