500 Series P501 Audio Processor

The P501 provides a high quality tracking solution in a single width 500 Series compatible module.

 

The only 'channel strip' solution for the lunchbox® with mic pre/hi pass filter/compressor/limiter and dual bargraph metering.

 

Flexible choice of mic, instrument and line level inputs feeding the class leader in tracking compressors featuring the multistage peakride system; wonderfully smooth on vocals and great for tightening up bass lines.

 

Check out the great features below.

Physical

  • Size : API™ 500 Series Compatible (38mm wide by 133mm high by 150mm deep)
  • Weight : 0.4kg (0.9lbs)
  • Power requirements : ±16 volts dc at ±120mA to the standard API 500 Series pinouts. +48 volts dc for phantom power
  • Fusing : On board 'auto reset' polyfuses protecting the ±16V and +48V rails

 

Main processor audio path

  • Frequency response : -0.5dB points at 5Hz and 60kHz
  • Distortion : > 0.01% at 1kHz (typically 0.008%) main signal path working at 0dBu

 

Maximum input levels

  • Microphone : +12dBu
  • Line input : +22dBu
  • Instrument : +18dBu (when fed unbalanced)

 

Input impedances

  • Microphone : 2k4 ohms
  • Line input : < 10k ohms
  • Instrument : 1M ohms

 

Equivalent input noise figures

  • Microphone : 128dB (max gain with 150 ohms source)
  • Line input : 100dB (unity gain)
  • Instrument: 105dB (max gain)

 

High Pass Filter

  • Switchable 80Hz hi-pass filter with 18dB/octave slope

 

Output Gain

  • ±15dB (post limiter)

 

Maximum Output Level (post limiter)

  • +22dBu

 

Output impedance

  • 50 ohms

 

Output Noise

  • -93dBu RMS unweighted, measured 22Hz to 22kHz
  • -95dBu RMS A-weighted, measured 22Hz to 22kHz

 

Input Gain Ranges

  • Microphone input : 0dB to +72dB
  • Line input : -10dB to +20dB
  • Instrument input : +2dB to +33dB

 

Peakride Compressor

  • Threshold range : 0dB to -40dB
  • Attack time range : 60ms to 1ms
  • Release time : variable from 90ms to 500ms (tracks the natural audio decay)
  • Ratio 1:1 to INF:1
  • Make-up gain : automatically set in proportion to the threshold and ratio settings
  • Gain reduction meter : calibrated in dB's

 

Dynamic Attack Limiter

  • Threshold : fixed internally to +6dBu (nominal)
  • Attack time : audio related with a fastest response of 0.5ms
  • Release time : audio related from 50ms to 500ms

 

Metering

  • Level metering : 6 element LED display measuring -21dB to 0dB (0dB equates to Limiter Threshold)
  • Gain Reduction metering : 6 element LED display