RDL FPPA20A 20 Watt Mono Audio Amplifier

Herman # RDLFPPA20A




The FP‑PA20A 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. Both a 70V and 100V amplified output are provided to drive corresponding speakers in a distributed sound system. Audio levels that could cause the amplified output to clip are compressed using two dynamic time constants designed to preserve aural transparency. 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 FP‑PA20A produces average audio levels and audio clarity normally expected of amplifiers delivering much higher output power.
  • 20 Watts RMS Constant Voltage Amplifier
  • 70 V and 100 V Outputs
  • Integral Audio Compressor to Control Clipping
  • High Overall Operating Audio Level
  • Maximized Audio Level for Output Power
  • Audio Quality Superior to Standard Amplifiers
Power Rating 20 Watts
Damping Factor Not Specified by Manufacturer
Input Sensitivity Not Specified by Manufacturer
Input Impedance 20 kOhm, Balanced bridging
10 kOhm, Unbalanced
Gain +23 dBu
Frequency Response
*measured at compressor threshold level equaling 4W RMS output power
35 Hz - 50 kHz, +/-1.5dB*
Signal-to-Noise Ratio Not Specified by Manufacturer
Total Harmonic Distortion (THD)
*measured at compressor threshold level equaling 4W RMS output power
<0.1% @1 kHz*
<0.5%, 50Hz - 20Khz*
Input Connections Plug-in terminal block
Output Connectors Plug-in terminal block
Controls Front Panel 1 x Gain Trim Knob
Controls (Rear) No
Indicators 1 x Green Power On LED
1 x Red Peak Compressor Active LED
Cooling No
Power Consumption 2A (continuous RMS power output, Ground ref.)
1A(normal program material w/min. compression, Ground ref.)
Dimensions 3.25 x 6 x 2.3" (82.6 x 153 x 58.5mm)
Weight 2.35 lb (1.1 kg)
Specialties Surface Mount 20-Watt Power Amplifier
Built-In Auto Compressor
Part NumberPriceQty.



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