Automatic Level Control - Mono - Terminal block

  • Consistent Levels from Variable Sources
  • Split-Band AGC for Audio Transparency
  • Self-Adjusting Attack and Release Times
  • AGC with Simple Single-Control Setup
  • Level Control Range > 20 dB
  • Gated Control to Avoid Level Seeking
  • Convenience of RDL® FLAT-PAKs™
Recommended Power Supply ( Not Included )
PS-24AS (USA)PS-24AX (International)


The FP-ALC1 is the ideal choice in many applications where consistent mono audio levels are needed from professional sources with varying audio output levels. Power connections are made using either the full-size barrier block or a dc power jack located in one end panel.

The FP-ALC1 is a single channel (mono) module featuring a detachable terminal block for the input and output. A single user adjustment makes installation simple and efficient. The gain adjustment is set as high as possible with the loudest source without the INPUT OVERLOAD indicator flashing. No further adjustments are needed. Sound systems fed from variable audio source levels, such as multiple CD changers, satellite receivers or paging sources benefit from consistent levels.

Common FP-ALC1 applications include paging outputs from telephone systems, music-on-hold feeds for telephone systems, background or foreground amplifier inputs in sound systems, voice feeds in communications/intercom systems.


Input:10 kΩ balanced bridging (may be
connected unbalanced)
Input Level:+4 dBu (nominal)
Output:150 Ω balanced (may be connected
Output Level:+4 dBu
Automatic Level Range:-16 to +14 dBu
Gate Threshold:-18 dBu (20 Hz to 3 kHz)
Frequency Response (excluding AGC):20 Hz to 20 kHz (± 0.75 dB)
THD+N (excluding AGC):< 0.15% (20 Hz to 20 kHz)
Noise:< -90 dB (below +4 dBu output)
Headroom:> 18 dB
Indicator (1):INPUT OVERLOAD
Ambient Operating Environment:0° C to 55° C
Power Requirement:GROUND-REFERENCED, 24 Vdc @ 80 mA
Overall Dimensions:Height: 1.42 in. 3.61 cm; Width: 3.25 in. 8.26 cm; Length: 5.75 in. 14.61 cm
Package Type:Cardboard Box
WEEE weight:0.625 lbs.
Shipping Weight:0.875 lbs.
Tariff code:8543.70.9860
Package Dimensions:4.375 x 7 x 2.25 in.

Related Products

  • FP-ALC2

    Automatic Level Control - Stereo - RCA Jacks

  • ST-CL2

    Compressor/Limiter - Line Level

  • ST-GCA3

    Gain Control Amplifier - Line Level

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  • FP-RRA

    Rack Adapter FLAT-PAK Series - 19" Fixed


    Rack Adapter FLAT-PAK Series - 19" Hinged

  • FP-RRB1

    Rear rack rail mounting kit for any FLAT-PAK module

DIN Rail Mounting Accessories




CAD FilesUnitsFormat
Engineering Functional BlockAmericanDXF
Panel Diagram - FrontAmericanDXF
Panel Diagram - FrontMetricDXF
High Res ImagesFormat
Declaration of Conformity

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