Audio Developments AD255 12 Input Drama and Film Location Mixer

SKU: AUD94255303

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Audio Developments AD255 Specifications

  • Max Gain

    Mic: 80dB
    Line: 50dB

  • Input and Output

    12 Input, 2 Output + 2 Aux

  • Input Level

    Mic at Max Gain -44dB, Mic at Min Gain: 0dB
    Line at Max Gain: -14dB, Line at Min Gain: +20dB
    Stereo-Return: +18dB
    TB Return: +18dB

  • Input Impedance

    Mic: >2k5R
    Line: >6k5R
    Stereo Return: >100kR
    TB Return: >20kR

  • Mic Powering

    48V Phantom & 12V Tonader

  • Max Output

    +23dBm L-R, AUX & MONO, (600R Load) Transformer Bal, +18dBm Direct Out, H'Phone & EXT 1 (600R Load) Unbalanced

  • Frequency Response

    0: -1dB L-R, AUX & MONO & DIRECT OUT
    0: -1.5dB MONITOR PATHS

  • Equalization

    HF: +/-10dB at 10kHz
    LF: +/-10dB at 100Hz
    MF: +/-15dB

  • Center Frequency

    2k5Hz Q=1.2

  • HPF

    Pre-Transformer 12dB/Octave
    -3dB at 150Hz
    -3dB at 90Hz

  • Output Limiter

    Threshold: +8dB
    Ratio: 7:1

  • Attack 2 Settings Internally Switchable

    4mS, 0.8mS

  • Release 2 Setting Internally Switchable

    250mS
    80mS

  • Factory Setting

    Slow

  • Current Consumption

    220mA (6 Input)
    12V DC Supply

About Audio Developments AD255

AD255 is the latest addition to the Audio Developments Ltd range of portable mixers, having comprehensive facilities set out in an ergonomically friendly design and all contained within a robust and rugged aluminum case with a relatively small footprint. The features and specification are based on the well established AD245 Pico Mixer. Two auxiliary sends and channel direct outputs are the main additional features.

As with the other models within the range, professional components are used throughout - including Penny and Giles 100mm long-stroke, conductive plastics faders. Location sound professionals now require multi-track record facilities, the channel direct outputs provide the necessary features; without compromising the simplicity of operation and reliability of its counterpart the AD245.

Audio Developments AD255 Features

  • Low noise microphone amplifier developed for AD140 series of mixers. Power is provided for 48V Phantom and 12V Tonader microphones
  • A simple but effective three band equalizer, proved and approved under field conditions, in use throughout the AD140 series of mixers
  • Inputs are transformer balanced and protected against radio-frequency interference. A high-pass filter protects against low-frequency saturation
  • The main stereo output is transformer balanced and has separate left and right faders
  • Two auxiliary outputs are transformer balanced and have separate master rotary controls. Auxiliary 1 & 2 are routed from each input using a 3 position switch (off, pre and post fader). Auxiliary 2 has a rotary level control
  • Limiters, which may be linked for stereo operation, are incorporated in the main output. Limiting is indicated by a pair of LEDs
  • Direct outputs are unbalanced and driven from a very low impedance source with high drive capability
  • Two LCD meters display - either PPM or VU - monitor the main output, auxiliary output and PFL of each input. Useful for monitoring level at a direct output. Battery level and monitor status (Direct or Return) are also indicated. Meters can be illuminated
  • The frequency of the internal oscillator can be selected between 1KHz and 10KHz, it's output replacing the signal on the main output
  • Via an internal microphone, the mixer operator is able to communicate with the main output (SLATE) and with an outstation (EXT) . The outstation normally receives a mono of the mixers main output
  • The headphone monitor may be switched between main output, auxiliary outputs and return. All have PFL override. Monitor selectors allow left, right, left + right, auxiliary 1, auxiliary 2 and auxiliary 1 + 2 to be routed to the headphone socket
  • An electronically balanced stereo tape return appears on a pair of stereo jack sockets. An input calibration potentiometer is adjacent to the jack sockets on the connector panel
  • All input and output connectors are presented on one surface of the case and in line with their corresponding modules
  • The mixer receives power from 8 x C cells fitted internally or from an external 12V - 15V DC source

Key Features

  • The main stereo output is transformer balanced and has separate left and right faders
  • The mixer receives power from 8 x C cells fitted internally or from an external 12V - 15V DC source