User:Xjordanx/sandbox

Screamin' Dolly is a guitar overdrive effects pedal, much like the Ibanez Tube Screamer or Boss SD1 or OD1 yet incorporating hand-assembled electronics, boutique operational amplifier (or OpAmp, namely the National/TI LM4562 Audio Hi-Fi opamp) and a handful of other mods over earlier overdrives. The pedal incorporates a traditional back-to-back diode clipping circuit in the feedback loop of the high-gain first-stage of the operational amplifier, and treble boost/cut tone control on the second stage. Rather than using a bipolar junction transistor (BJTs) for the input buffer it uses an ultra-low noise JFET.

In addition to low noise component improvements over the original TS9, TS808, OD1 or SD1 circuits, the Screamin' Dolly uses a 3-pole, double-throw heavy duty footswitch for true bypass. While it is subjective, and argued amongst guitar players whether or not true bypass makes a noticeable improvement in tone preservation, it is nevertheless common for players to have pedals that used click-less JFET bypass circuits modified to use a mechanical foot switch instead.

The pedal is named after Dolly, the cloned sheep, and sports two mirrored screaming sheep's faces in cartoon on the front panel.