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500 series classic Opto compressor with gain reduction and output volume

The Tegeler Audio Vocal Leveler is a single channel Opto compressor taken from the Vari Tube Recording Channel and adapted to the 500 series format. 

The Tegeler Audio Vocal Leveler offers a simple control layout consisting of Gain Reduction and Output level control knobs and a time constant three-way toggle switch. The time constant switch offers a choice between Slow and fast settings as well as an auto setting for program-dependent behaviour. A large VU meter is also provided to show the amount of gain reduction. A second toggle switch serves as a bypass in/out as well as a link when two units are connected together.

As the name suggests, the Vocal Leveler delivers a stunning performance on vocals with an open and analogue sound while maintaining your sound consistent and upfront. It also works great on bass and other instruments.


  • Frequency Range: 20 - 22.000Hz
  • Maximum Input Level: 20 dBu
  • Input Impedance: 2.4k
  • Output Impedance: < 600
  • Operating level +4 dBu
  • Maximum Output Level: 21 dBu
  • Dynamic Range: 100 dB
  • Max. Gain Reduction: -12 dB
  • Voltage: +- 16V
  • Fuse: -
  • Power requirement: 80 mA
  • Measurements: 1 API 500 module width
  • Weight: 540g
  • API 500 series mono opto compressor
  • Two knobs: Gain reduction, Output
  • 3-way switch (left): In, bypass, link for stereo use of two Vocal Levelers
  • 3way switch (right): Attack + Release time: fast, auto, slow (Zeiten rein)

Tegeler Vocal Leveller