RDL FP-PA20A Manual

RDL Modtager FP-PA20A

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FLAT-PAK™ SERIES

Model FP-PA20B

20 W Audio Power Amplifier

 20 Watts RMS Constant Voltage Amplifier

 25 V Output

 Maximized Audio Level for Output Power

 Audio Quality Superior to Standard Amplifiers

 Input / Output Terminal Block Connections

 Line Level Balanced or Unbalanced Input

 Integral Audio Compressor to Control Clipping

 High Overall Operating Audio Level

 Peak LED to Indicate Audio Compression

 Ultra-compact All Metal Construction

 Convenience of RDL FLAT-PAKs

The FP-PA20B is part of the group of versatile FLAT-PAK products from Radio Design Labs. The unique

FLAT-PAK case can be directly screwed or bolted to cabinets or shelves. Optionally available rack-mounting

accessories permit single or multiple FLAT-PAK module mounting.

APPLICATION: The FP-PA20B is the ideal choice in many applications where multiple 25 V speakers in a

zone need to be powered from a single audio power amplifier.

The FP-PA20B features a balanced line level input that may be connected unbalanced. A front panel GAIN

control is designed to be adjusted either manually or with a trimming screwdriver. The gain range will

accommodate standard unbalanced levels as well as professional balanced levels. A 25 V amplified output

is provided to drive corresponding speakers in a distributed sound system.

A red PEAK LED is provided to indicate the threshold of the integral compressor. Audio levels that could

cause the amplified output to clip are compressed according to two dynamic time constants. Normal audio

level signals remain unaffected by the compressor thereby preserving audio dynamics and preventing the

compressor from increasing feedback potential when the amplifier is used for paging. The compressor is

designed to remain aurally transparent while maintaining clean, unclipped amplified audio for input overloads

of up to 20 dB. In addition to the compressor, an active filter circuit prevents saturation of the output

transformer at low frequencies. The FP-PA20B produces average audio levels and audio clarity normally

expected of amplifiers delivering much higher output power.

The durable construction and low profile of the FP-PA20B allow mounting in a wide range of locations not

suited to a conventional style power amplifier. Power is provided to the module either through the barrier

block or through the DC power jack. For continuous RMS output power, a 24 VDC 2A power supply is

required. A 1A supply is sufficient for normal program audio levels and content. Power supplies are sold

separately.

Wherever a high quality constant voltage audio power amplifier is needed to provide reliability, compactness

and unsurpassed versatility, the FP-PA20B is the ideal choice. Use the FP-PA20B individually, or combine it

with other RDL products as part of a complete audio/video system.

RDL 



 659 6

th St. 



 Prescott, AZ., USA 86301 



 (928) 443-9391 



 



 FAX (928) 443-9392 www.rdlnet.com

Produkt Specifikationer

Mærke:	RDL
Kategori:	Modtager
Model:	FP-PA20A

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