The EQ 1AM 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 1AM have fully floating transformers, and all DC voltages are stabilized, except the anode voltage for the output stage.
The EQ 1AM is fitted with rotary switches for more precise and repeatable settings.
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
Unit fitted with rotary switches rather than continuously variable potentiometers, for more precise and repeatable settings
All switches gold plated
In the Box
TUBE-TECH EQ1AM - Single Channel 3-Band Parametric, with High/Low Shelving and High/Low Cut All Tube Equalizer with Rotary Switches
One Year Warranty
Table of Contents
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Low and High Pass, Low and High Shelf, 3 Band Parametric
Number of Channels
1 x XLR
1 x XLR
Maximum Input Level
Not specified by manufacturer
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
Bands 1 to 3 variable
Low and High Shelve: +/-15dB Bands 1 to 3: +/-20dB sharp bandwith, +/-12dB narrow