K&K's Ultra Pure onboard active system has been completely redesigned in response to customer feedback. The newly designed UltraPure Preamp features +/-20 db bass/low, K&K's proprietary wide band midrange, and treble/high controls, plus internal gain trimmer. The addition of a phase switch is one of the most important tools for live sound amplification. The system also includes a volume control and low battery indicator. All features are easily accessed at the soundhole. Installing the preamp requires no destructive alteration to your instrument.
The Ultra Pure Classic system integrates the Ultra Pure preamp with K&K's award-winning Pure Classic pickup for classical and nylon-string string acoustic guitar. Four surface transducers are attached to the bridge plate or soundboard, under the line of the saddle. They transmit a significant portion of the soundboard because they are not as close to the strings as an under-saddle pickup. using 4 transducers ensures a balanced sound and enables two transducers to be fitted either side of the long central brace used on many classical guitars. Unlike saddle-slot transducers, the Pure pickups are not under pressure and therefore do not sound percussive or harsh. Additionally, they do not require modification of the saddle or saddle slot.