The Tone Capsule is a new, unusual take on onboard preamplifiers. It s designed to respect your instrument s natural character while expanding exponentially the tonal possibilities.The Tone Capsule is unique in the way that it doesn t have a Treble control. The idea was Sheldon Dingwall s: he thought that making a Bass-Mid-Treble was too normal for his liking because everyone does it that way, so he suggested including a second mid control instead. Because the second control could be configured to operate at the higher end of the spectrum, it offers all the benefits a standard Treble control (increased clarity and definition when boosting) but with a more natural, less-harsh and noiseless operation.Take the pill and discover a whole new universe of sonic possibilities.Get yours today; with the security of our many decades of experience and Sam Ash Direct efficient order processing, your satisfaction is guaranteed!Specs9V-18V operation: The Tone Capsule can function with either one or two batteries in series for 9V or 18V operation respectively (battery clips not included)Bass: +-12dB @70Hz (potentiometer included)Mids: +-12dB @500Hz (potentiometer included)Hi Mids: +-12dB 2.8kHz (potentiometer included)