Tube-Tech EQ 1A All-Tube Parametric EQ Details

The EQ 1A. One of the world's finest and most musical EQs.

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.

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.

Tube-Tech EQ 1A All-Tube Parametric EQ 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

Tube-Tech EQ 1A All-Tube Parametric EQ Specifications

• Impedance
  • Input: 600 Ohm
  • Output: <60 Ohm
• Frequency response@ -3dB 5 Hz to 80 kHz
• Distortion THD+N @ 40Hz
  • 0 dBU 0.10 %
  • +10 dBU 0.10 %
  • Max. output: +26 dBU <1 %
  • Max. input: +21 dBU <1 %
• Noise Rg=200 Ohm
  • 22 Hz-22 kHz:< -85 dBU
  • CCIR-468-4: < -75 dBU
• CMMR @ 10 kHz: < - 60 dB
• Gain: 0 dB
• Tubes
  • ECC 81: 3 pc
  • ECC 82: 1 pc
  • ECC 83: 3 pc
• Dimensions
  • Height: 2 units, 88 mm 3.5"
  • Width: 483 mm 19.0"
  • Depth: 205 mm 8.1”
• Weight
  • Net: 5.5 kg 12.1 lbs
  • Shipping: 6.9 kg 15.2 lbs
• Power Requirements
  • @ 115 V/230 V, 50-60 Hz: 30-45 W

Tube-Tech EQ 1A All-Tube Parametric EQ Downloads

• Manual
• Specifications
• Recall Sheet

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