It seems to add subharmonics to the low end which makes the bottom end sound huge. The 1073 smooths the top end which gives the highs a silky sheen. In addition, the 1073 compresses transients just a little bit. It's a smooth, fat, larger-than-life sound. An added bonus is to use the DI inputs to fatten samples, synths and mixes since the DI can handle line levels.
The 1073 equalizer is very broad-banded and musical. It has a hi-pass filter with four frequencies- 50 Hz, 80 Hz, 160 Hz and 300 Hz. The low frequency band is shelving and has four frequencies - 35 Hz, 60 Hz, 110 Hz and 220 Hz. The low end of this equalizer is so tight that you can boost 220 Hz and not muddy up the sound. The mid band has six frequencies - 360 Hz, 720 Hz, 1.6 kHz, 3.2 kHz, 4.8 kHz and 7.2 kHz. The bandwidth is broad so you can boost or cut a lot without making things sound processed or unnatural. The hi band is shelving and is fixed at 12 kHz. It is smooth and silky and a little goes a long way.
High Frequency: +/-16dB fixed frequency shelving at 12kHz.
Low Frequency: +/-16dB shelving with selectable frequencies of 35Hz, 60Hz, 110Hz & 220Hz
Mid Frequency: +/-18dB peaking, fixed 'Q' with, selectable centre frequencies of 0.36kHz, 0.7kHz, 1.6kHz, 3.2kHz, 4.8kHz & 7.2kHz.
High Pass Filter: 18dB per octave slope, switchable between 50Hz, 80Hz, 160Hz & 300Hz.
EQ Button: Switches the equaliser on or off.
Phase Button: Flips phase180º.
1073 Module or 19" rackmount.