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EQ 1A Parametric Equalizer

EQ1A Description

TUBE-TECH EQ1A. One of the world's finest and most musical EQ's


This full parametric EQ is fantastic for adding flavor. No matter what frequency

you chose to work on, the EQ1A is adding pure magic to your source material.


From the ultra highs to the extreme lows, the EQ1A works like a dream.

This equalizer is able to make any source melt perfectly into the mix, with the highest fidelity.

For bus eq you don''t find anything like it!


EQ1A Controls and Features Video











EQ1A Sound Samples

Tracks : Examples :
Male Vocal
Male Voice
Acc Guitar
Bass Drum


EQ1A Technical Features

  • Low cut at 6 frequencies: Slope 6 dB or 12 dB/octave
  • High cut at 6 frequencies: Slope 6 dB or 12 dB/octave
  • Band 1-3, bell type: 36 overlapping frequencies (12 per band), +/- 20 dB with variable bandwidth
  • Low shelving at 6 frequencies: +/- 15 dB
  • High shelving at 6 frequencies: +/- 15 dB
  • All switches gold plated
  • Conductive plastic potentiometers
  • Frequency response: 5 Hz to 60 kHz
  • Very low noise: < -85 dBU
  • Master bypass with clickless relay
  • All 7 sections fitted with separate in/out switch


EQ1A Technical Description

The TUBE-TECH EQ 1A is a full range one channel unit, featuring low and high cut,

low and high shelving as well as three overlapping bands of equalization.

The cut filters are designed around unity gain amplifiers and the shelving and the bell filters are designed around two tube operational amplifiers.

The unit is all tube based except for the power supply. Input and output have fully floating transformers. All DC voltages are stabilized, except the anode voltage for the output stage.


Optional Master Version available:

The EQ 1A Equalizer can be fitted with rotary switches instead of pots for even more precise settings.

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