Adventures In Audio with Audio Masterclass
Recording SoftWare for Blind people. Can anybody Please help?

Apex PE 133 MkII Paragraphic Equaliser (part 4)



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

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

This high level audio course is essential knowledge for anyone who wants to learn how analog consoles and their state of the art studios are "wired up." It gives you the deepest possible understanding of mixing console Signal Flow and I/O both analog & digital.

Learn more...

Add comment

David Mellor