The 3rd Power HD 100 handwired 100W tube guitar amp head was inspired by the 12000 Series 100W plexi. What sets the HD100 apart from other faithful renditions as well as hot-rodded versions on the market is a patent-pending circuitry that enhances the playing experience to deliver a finished guitar tone that needs no further corrective equalization down-stream. Access to this circuitry enhancement is available via an unassuming mini-toggle switch located on the front panel. It is here that guitarists have the ability to switch between a stock Plexi tone-stack voicing and the 3RD POWER "mastered tone" setting. When engaged, corrective equalization occurs. 3rd Power's proprietary DirecDRIVE preamp circuitry delivers vintage clean to modern mean all on a single Gain control. Their approach to the generation of harmonically rich distortion is unique and does so without employing any clipping diodes - often the source of harsh high frequency content that simply cannot be removed from the signal. There's also a dramatic reduction in hiss and noise leaving you with a superb tone and clarity that eliminates the barrier between your fingers and what comes out of your speakers.