Scheps 73
This is a very colorful EQ that can be used in many different ways. The Scheps 73 provides an option to color the sound with harmonic distortion ranging from pleasant warmth up to the heavy distortion.
The Stereo version

The Mono version

One cool think I like with the GUI is that LINK I/O enables you to drag the faders linked without chaning the output gain.
Harmonic distortion
A closer look at how the harmonic distortion looks like in the drive mode, all bands are off, only preamp and drive

Frequency analysis with a test tone of 100 Hz

It adds both even and odd harmonics
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