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Tube-Tech EQ1A - Single Channel 3-Band Parametric All Tube Equalizer with High/Low Shelving and High/Low Cut

B&H # TUEQ1A Mfr # EQ1A
No Longer Available

The EQ 1A is a full range one channel unit, featuring low and high cut, low and high shelving and three overlapping bands of tube EQ.

The three bands are bell type with 36 overlapping frequencies, 12 centers per band. The cut filters are designed around unity gain amplifiers, while the shelving and bell filters are designed around two tube operational amplifiers. The gain controls on the unit are fitted with a boost/cut switch to widen the gain range. The inputs and outputs of the EQ 1A have fully floating transformers, and all DC voltages are stabilized, except the anode voltage for the output stage.

All tube based EQ (except for power supply)
Very low noise and broad frequency response
Master bypass with clickless relay
All seven sections fitted with individual in/out switches
All switches gold plated
Filter Type Low and High Pass, Low and High Shelf, 3 Band Parametric
Number of Channels 1
Inputs 1 x XLR
Output 1 x XLR
Maximum Input Level Not specified by manufacturer
Frequency Bands Low Cut: 16, 25, 40, 60, 90, 130Hz - 6dB or 12dB slope
Low Shelving: 22, 32, 45, 70, 100, 150Hz
Band 1: 40 to 500Hz, 12 ISO centers
Band 2: 315Hz to 3.15kHz, 12 ISO centers
Band 3: 1.6 to 20kHz, 12 ISO centers
High Shelving: 4, 6, 8, 12, 26kHz
High Cut: 6.3, 8, 10, 12, 18, 25kHz - 6dB or 12dB slope
Bandwidth Bands 1 to 3 variable
Range (Boost/Cut) Low and High Shelve: +/-15dB
Bands 1 to 3: +/-20dB sharp bandwith, +/-12dB narrow
Maximum Output Level +26dBu
Frequency Response 5Hz to 80kHz
Dynamic Range Not specified by manufacturer
Noise <-85dBu
Dimensions 2U rack
Specialties All tube design
Tube-Tech EQ1A - Single Channel 3-Band Parametric All Tube Equalizer with High/Low Shelving and High/Low Cut
  • Power Cable
  • One Year Warranty
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