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Apex PE 133 MkII Paragraphic Equaliser (part 4)

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Specifications

The Apex PE133MkII has an electronically balanced input with an impedance of
10kohm on each leg, overload point of +22dBu and CMRR or better than 65dB within
the audio band. Pin 2 of the XLR is hot according to the internationally recognised
standard.


The output is electronically balanced, simulating a transformer output in that
pin 3 should be grounded when driving an unbalanced input. Maximum output is
+21dBu into 600 ohms with an output impedance of 51 ohms.

  • Frequency response: 20Hz-20kHz +0/-0.5dB, graphic in
  • THD: <0.01% (20Hz-20kHz)
  • Noise: <-94dBu graphic & parametric in at 0dB settings, 22Hz-22kHz unweighted
  • Level control: minus infinity to +6dB
  • Level control ‘0dB’ accuracy: ±0.2dB
  • Overload indicator: lights for 200ms if the instantaneous peak voltage anywhere
    within the unit comes within 2dB of clipping

  • Graphic equaliser
  • 30 ISO centre frequencies, 25Hz-20kHz 1/3 octave
  • Centre frequency tolerance: ±1%
  • Q tolerance: ±1%
  • Max boost/cut: 6dB or 12dB switchable
  • Parametric equaliser
  • Tuning ranges: 18Hz-200Hz, 180Hz-2kHz, 1.8kHz-20kHz
  • Vernier control: ±10% of main frequency control
  • Range of Q: 0.5 to 8
  • Range of level: -45dB to +15dB
  • High pass filter
  • Frequency range: 15-300Hz
  • Type: maximally flat, 12dB/octave
  • Low pass filter
  • Frequency range: 2kHz-40kHz
  • Type: maximally flat, 12dB/Octave

David Mellor

Layout, Signal Flow & I/O

Layout, Signal Flow & I/O

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David Mellor