The Arthur master EQ unit is a multi-band parametric equalizer. Many sound engineers look to avoid filters on their main stereo output signals, knowing that these color and flatten the dynamic of the original signal. This becomes audible in the loss of freshness and attack.
The master EQ unit’s architecture avoids any NFB circuitry. Instead it contains straightforward high-voltage Class-A circuits with no negative feedback loops to have a slowing effect. This is very rarely found in a filter configuration and you will need extremely good ears to notice any difference in sound quality between the signal bypassing or passing through these particular filters. Good to know!