Formula Sound AT-1 Auto-Volume Control for Sentry, Wall/Service Mount Version

The Formula Sound AT1 Auto-Volume Control for Sentry has been designed to be used in conjunction with the Sentry MK2 environmental control unit. It is a stereo unit, designed to control the volume level by reducing the signal, which in turn reduces the sound being measured.

Formula Sound AT1 Auto-Volume Control for Sentry Rack Version Features

- To be used in conjunction with the Sentry MK2
- Controls volume level of an audio system connnected to it
- Ensures DJ doesn't get cut off by playing too loudly
- Led indicators on the front panel show how much the AT-1 is attenuating
- Wall/Service Mount Version

Formula Sound AT1 Auto-Volume Control for Sentry Rack Version Specifications

- Case Styles: Two versions are available: - a 19-inch 1RU unit, and a free standing or wall mounted unit which may be more convenient for connecting to visiting systems.
- Input connectors:
  - 2x ¼-inch 3 pole jacks which will also accept 2 pole jacks.
  - 2x 3 pin XLRs.
- Output connectors:
  - 2x ¼-inch 3 pole jacks which will also accept 2 pole jacks.
  - 2x 3 pin XLRs.
  - Using 2 pole jacks will automatically convert the inputs or outputs to unbalanced operation.
  - To use XLRs unbalanced connect pins 1 and 3 to screen.
- Control connector: 1x 4 pin connector. The mating half is supplied and features screw terminals. (4 core cable connects to Sentry Mk2)
- Maximum input level: +20dBu.
- Maximum output level: +20dBu into a 600 Ω load at <.01% distortion.
- Input impedance:
  - 20K Ω balanced
  - 10K Ω unbalanced.
- Noise: EIN -90 dBu.
- Attenuator range: Unity Gain to -90dB.
- Led Indicators: -3dB, -6dB, -9dB, -12dB, -15dB, -18dB, attenuation. Input Clip.
- Mains power: IEC connector fused @ 250mA. 220 or 110VAC may be specified.

Physical:
- Dimensions (W x H x D): 395 x 48 x 125 mm
- Finish:
  - Front and rear panels black anodised aluminium
  - Covers black plastic-coated steel