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Tube-Tech HLT2A

The TUBE-TECH HLT 2A is a stereo equilizer featuring active low and high shelving EQ, a passive T-filter plus passive Hi/Lo cut filters and an overall bypass switch.

The shelving EQ's are designed around a high gain tube amplifier, and the T- filter and Hi/Lo filters are passive filters placed after the active shelving EQ and before the output amplifier. All sections are supplied with a bypass switch.

The HLT2A furthermore features an overall bypass switch.

The midrange T-Filter "tilts" the entire spectrum around a selectable midrange frequency point. Frequencies above that point increase (or decrease) while frequencies below that point decrease (or increase). This unique topology, provides a powerful and uniquely efficient way to get beautiful-sounding overall equalization. As such, the Tube-Tech HLT-2A is destined to become a "go-to" equalizer in high-end mastering houses,smaller project studios, and everything in between.

Like all Tube-Tech processors, the stereo HLT-2A possesses a warmth and character that breathes life into a track and gives it an organic body that somehow manages to occupy real physical space inside a stereo mix,

However, the functionality of the HLT-2A is unique in the Tube-Tech line - and indeed in the world of analog processing. Users will find that the HLT-2A generates quick, intuitive results that can range from mild to extreme, and it sounds great on individual tracks or strapped across the drum bus or the mix bus."
  • TUBE-TECH HLT 2A is a stereo unit, featuring low and high cut filters,
  • low and high shelving filters and a T-filter.
  • The shelving filters are designed around a high gain tube amplifier.
  • The T-filter is a passive filter placed between the shelving filters and the output amplifier. All three sections are supplied with a in/out switch.
  • The low and high cut filters are also passive with a slope of 6dB/octave.
  • A bypass switches the whole filter section out of the amplifier circuit, keeping the output stage in the circuit.
  • The T-filter is like a seesaw. When the low end goes up, the high end goes down and visa versa.
  • When the potentiometer is turned clockwise, the high frequencies are boosted and the low frequencies are attenuated.
  • When the potentiometer is turned counter clockwise, the low frequencies are boosted and the high frequencies are attenuated
  • 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.
  • Specifications
  • Tube based push-pull amplifier
  • Freq. resp. @ -3 dB: 5 Hz - 55 kHz
  • Low noise: < -80 dBU @ 0 dB gain
  • CMRR: > 60 dB @ 10 kHz
  • All-tube active/passive EQ

  • Low cut: 18, 25, 40, 60, 85 Hz, 6db/octave
  • Low shelving: 18, 37, 80, 180, 370, 800 Hz. Gain: +/12dB
  • High shelving: 1, 2, 5, 10, 15, 22 kHz Gain: +/12dB
  • T.-filter: 0,5, 1, 2kHz. Gain: +4/-7 dB
  • High cut: 12, 15, 18, 20, 25 kHz, 6db/octave
  • Tracking between channels: +/-0,3 dB
  • Input impedance: >10 k
  • Output impedance: < 60
  • Conductive plastic potentiometers
  • In- and output are transformer balanced and fully floating
  • Reviews
    Free shipping in Canada. Conditions
    Additional information
    For more information about the HLT2A, please visit the website of Tube-Tech
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