- I74 compact EQ
- Compact 4 Band Equalizer for 3U frames
The adt-audio I74 is a 4-band, mono equalizer with 2 fully parametric mid-bands, and an extraoordinary resolution and benchmark transparency.
The unit is the compact version of the I85 mono equalizer . The circuit design is based on the phase coherent, active Vienna Robinson's bridge principle. The two overlapping fully parametric mid bands offer 20dB of boost and cut and adjustable bandwidth. The inputs and outputs are balanced and floating.
With its enormous range, transparency and phase coherency, extreme interventions of tonal surgery are possible. Even with extreme boosting or cutting of frequencies, this stereo equalizer remains clean and crystal clear.
HI-and the LOW-EQ have switch selectable center frequencies. The HI-EQ can be switched to 2 different characteristics. In the 20kHz position it works as a soft shelf EQ above 20kHz. In the position 12kHz or 8kHz the characteristic of the HI-EQ changes to a very soft bell curve whose center frequency is located at 12kHz or 8kHz respectively. This setting produces soft clean highs full of pressure.The LOW-EQ always works as a soft bell curve filter with three selectable center frequencies of 100Hz, 60Hz and 40Hz.
The I74 compact EQ is a 3U high INTEGRATOR module and the I85 is a 4U high module, the I86 is the stereo version of this module.
Balanced and floating inputs and output