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Radio Design Labs FP-ALC2
Automatic Level Control - Stereo

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Radio Design Labs FP-ALC2

The FP-ALC2 is the perfect choice in many applications where consistent stereo audio levels are needed from consumer sources with varying audio output levels. Power connections are made using either the full-size barrier block terminals or a dc power jack.

The FP-ALC2 is a two channel (stereo) module featuring phono jack INPUTS and OUTPUTS. 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. Foreground as well as background sound systems fed from variable audio source levels, such as multiple CD changers or satellite receivers, benefit from consistent levels.

The automatic level control circuitry in the FP-ALC2 maintains a consistent –10 dBV output for input signal variations as great as 25 dB. Yet the operation of the module is nearly transparent to the listener for a wide variety of source material from rock to classical. The FP-ALC2’s low profile and compact size permit mounting in confined spaces and in various convenient locations.

Features:

  • 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

Specifications:

  • Inputs (2): 10 kW unbalanced phono jack
  • Input Level: -10 dBV (nominal)
  • Output: 200 W Unbalanced Phono Jack
  • Output Level: -10 dBV
  • Automatic Level Range: -30 to 0 dBV
  • Gate Threshold: -40 dBV (20 Hz to 3 kHz)
  • Frequency Response (excluding AGC): 20 Hz to 20 kHz (± 0.5 dB)
  • THD+N (excluding AGC): < 0.15% (20 Hz to 20 kHz)
  • Noise: < -90 dB (below –10 dBV)
  • Crosstalk: -75 dB (typical, 1 kHz)
  • Headroom: > 18 dB
  • Indicator (1): Input Overload
  • Power Requirement: Ground-Referenced 24 Vdc @ 80 mA
  • Dimensions (H x W x L): 1.20" x 3.25" x 5.75" (3.05 x 8.26 x 14.61 cm)
Power Supply, 24 Vdc @ 400 mA
Radio Design Labs PS24A
Power Supply, 24 Vdc @ 400 mA

24 VDC power supply for use with Radio Design Labs audio equipment.

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Power Supply, 24Vdc @ 150mA Out
Radio Design Labs PS24B
Power Supply, 24Vdc @ 150mA Out

Features: North American Plug Format 120 Vac In, 24 Vdc Single-Ended, 150 mA Out DC Jack Output Connector UL Listed, CSA Approved DC Jack Output

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Din Rail Mounting Bracket
Radio Design Labs DRA-35F
Din Rail Mounting Bracket

The DRA-35F is a DIN rail mounting bracket that provides positive mounting for any RDL FLAT-PAK™ module. DIN rail mounting is ideal in locations subject to vibration, in confined spaces or where traditional rack mounting is not desired. ...

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FP-PA20A and PS Pole Mnt Adptr
Radio Design Labs PM-1V
FP-PA20A and PS Pole Mnt Adptr

The PM-1V vertically mounts any FLAT-PAK series module to a standard (1.5” I.D.) round projector pole or to any smaller round or rectangular pole.

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Pole Mount Tray for RDL Module
Radio Design Labs PM-1T
Pole Mount Tray for RDL Module

The PM-1T is a tray that mounts above a projector using a standard (1.5" I.D.) round projector pole or any smaller round or rectangular pole. The tray accommodates up to two FP-PA20 Audio Power Amplifiers (for stereo operation) and two ...

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