Doppel is my second Foxx Tone Machine based pedal which now exhibits completely different potential than the original circuit. Some uncommon circuit tweaks deliver a new approach to such a classic pedal. It's overall character is now raw, mean, brutal and skeewy, yet delivers some handy tone operations potential. Probably the thickest and heaviest fuzz of this type you'll ever try.
Fuzz knob tends to enhance different range of midrange towards low settings, with gentle low-end cut at minimum (it acts in kinda similar way to a wah pedal). This means it is an effective tone shaping tool beyond simple gain control, with many sweet-spots across the whole dial.
Jolt knob lets undistorted low-end through and adds extra grit to the fuzz sound. With this control dialled it gets extra juicy and bold.
Tone knob acts similar to BMP control, but it's midrange is slightly boosted to make it cut through and not so dramatic in action. 'Total' character is quite dark but allows to dial in some high end aggressive rasp.
Doppel now comes with internal DIP-switch, which allows to cut out some of that midrange or to set a heavy mid-scooped tone for vast amount of available tones, including classic octave-fuzzes voicing and also kind of BMP-likeness, in addition to 'stock' obese and midrange-heavy fuzz tone.
Level knob provides lots of gain on tap so you can smash your amp even with lowest fuzz setting.
Octave switch switches octave on. Octave knob blends octave effect with the basic tone, what changes it's character from 'overwhelming' to more 'matching', with many useful settings across the dial. Octave itself is not as sweet and slinky as in other Foxx-based octavefuzzes (e.g. my Prophet). It's raw, mean and angry. With jolt turned up and octave even at max no low-end is sacrificed.
NO BATTERY OPERATION POSSIBLE WITH THIS PEDAL. Feed it only with standard 9V DC negative center power supply.
octave - octave up level (when engaged with left footswitch)
fuzz - controls amount of distortion and filter response (CCW rolls of low end and sweeps range of mids boost)
level - output volume level
jolt - CW adds undistorted low end and extra dirt
tone - CW bright tone, CCW dark tone
two sections mid boost DIP switch - both up for a default midrange boost, '1' up only for a gentle midscoop, both down for a heavy midscoop ('2' up only doesn't make much difference to both up)