Dark and smooth with great clean up from the volume pot of the guitar. The fuzz is on full for this entire clip, the guitars volume is adjusted up and down to show the tonal range of the pedal.

I set my collector voltages on Germanium Fuzz pedals at around 5.5 volts to squeeze a little more gain out the circuit. I discovered that the voltage drops when the guitar signal passes through and the harmonics change when the note decays and the voltage returns to normal. Interesting.

When combined with certain fuzz effects, the Anthony Leo fuzz creates a faux reverse kind of effect. It's a swelling that works only on tube amps and when the effect has a fresh power supply. Sounds great.

I never cared for the stock tone of a DS-1. Too crinkly, midless and Bossy for my taste.
Here's a mod that turns it into a nasty gain filled bastard.