Double the overdrive, double the fun!
The Super-Duper 2-In-1 guitar pedal from ZVex is a dangerously loud pedal that combines two Super Hard-On pedals in one small box, with two switches, and LED indicators. Its Master volume control lets you use it as an overdrive/distortion with any output volume.
Creator Zach Vex has a warning for those considering the Hand-Painted Super Duper 2-in-1 Boost: "I WARNED YOU TO BE CAREFUL. When using this pedal, start off slow, and monitor your amp for potential damage." This is no joke—with two Super Hard On circuits in one enclosure, this pedal is dangerously loud!
Channel 1 is a conventional Super Hard On, with a gain control on the far right and a yellow LED to let you know when it's engaged. If you're familiar with the SHO, you know that it's a very sparkly sounding, high input-impedance preamp with incredible headroom, wide-ranging gain (unity to 60X!), and a maximum volume that will knock out your fillings. Channel one has no Master Volume control, but it's cascaded into Channel 2, which does.
Channel 2 and Master Volume
This channel has the very same circuit as Channel 1, but the bleeder resistor on the output has been replaced with a Master Volume control, allowing you to turn down the output volume even if the gain is cranked. When Channel 2 or both channels are on, the Master Volume is active.
What's it sound like?
You might wonder just how insane the Super Duper 2-in-1 sounds with both channels active and cranked up. Zach says, "I can't get my Les Paul to stop feeding back at any audible volume level on my Marshall . . . I'm happy about that." Of course, wide open isn't the only setting on the Super Duper 2-in-1. It gives you a total of four volume levels, ranging, at your choice, anywhere from perfectly clean to ragingly overdriven:
Level 1: Your guitar is true-bypassed with both channels off.
Level 2: Channel 1 engaged.
Level 3: Channel 1 off, Channel 2 engaged.
Level 4: Both channels engaged
There's no tone shaping in the Super Duper 2-in-1. Its two perfectly linear, high-gain, high input impedance preamps can be cascaded with a total gain that ranges from unity to 3600. That's right, the maximum gain with both channels wide open is a whopping 3600, which is so completely distorted, hissy, feedbacky, and insane that you'll never have a steady relationship again. Or a lease. Or a pet. Fortunately, with the Master Volume you can hear what that sounds like at a reasonable volume.
Note: Due to the nature of each hand-painted Super Duper 2-in-1 pedal, there may be a slight difference in design from the posted image.