Sonic replica with a few tweaks of a well known valve powered pedal associated with Gilmour, Johnson & J Mascis.
Powerful EQ tweaked for less harshness and fizz at lower volumes. Additional headroom allows it to be used as a clean boost to push a tube amp to it's sweet spot or musical overdrive gives a natural tone into a clean platform.
"The TD-X is everything the Tube Driver is and more. It's equally huge sounding, with a distinct and unique amp-like character and quality. It's as dynamic and responsive to your pickups and playing. Slightly darker, not as aggressive and overall a bit more well behaved." (Gilmourish.com)