The Dirty Little Secret Deluxe represents the next logical step in Marshall Plexi emulation, reaching beyond the preamp circuit and adding the rest of the amp for an extremely authentic take on everything inside that chassis. Catalinbread's original DLS circuit has been tweaked and upgraded throughout, now featuring a phase inverter, power amp sim and output transformer as well as some new features and the most requested modifications for the original. One such addition is a toggle switch on the outside to select between Super Lead and Super Bass modes, and they've also externalized the Presence knob to easily dial in your preferred Marshall flavor. Also added is a piece of the Dirty Little Secret—a single preamp tube simulator—as a built-in boost circuit that can be used independently of the main circuit. You can run the boost and DLS in any order you like; put the boost before the DLS for a high-powered saturated tone or after to pummel the front end of your amp. A new tightness knob lets you shave off the sub-bass for a little extra clarity or completely attenuate the low end for some cool thrash metal tones. A Line Out jack gives you a dedicated +10dB output that you can use with a mixer or DAW, and you can use both outputs simultaneously. Between the Boost, order selector and the external Super Lead/Super Bass modes, the Dirty Little Secret Deluxe is engineered to be a total performance tool that does the line justice.