Modify your Behringer VT911 Vintage Tube Overdrive Mod Service Only
The mod begins with swapping out the cheap Chinese 12AX7 vacuum tube with a new Electro-Harmonix or Tung-Sol 12AU7. This makes the gain smoother and less "harsh". I also upgrade the circuit to increase the available headroom and expand the useable range of the 'Drive' knob - which now has clarity and punch throughout the settings. Lastly, I upgrade the knobs and LED in your choice of color.