ZTPRE

About the ZTPRE

The Decware ZTPRE is a high-end fully differential balanced tube preamplifier designed as a dual-mono unit, derived from the streamlined circuit of the popular CSP3 preamp but doubled for balanced operation with a total of 6 dual triode tubes (6N1P or 6922). It employs quad linear power supplies—one for heaters and one for high voltage per channel—running cool with exceptional headroom and no negative feedback. The design offers exceptional transparency akin to a high-end passive preamp while animating music dynamically. Current model ZTPRE v2 is stripped for performance, hand-built to order in the USA with a lifetime warranty. It supports 1 or 3 XLR inputs (options for RCA substitution), fully adjustable XLR outputs via dual volume controls or optional remote motorized control, and output level controls per channel to match amplifier input sensitivity. Factory tube complement is 6 x 6N1P-EV or 6N1P-EB for smooth, warm sound especially with digital sources. Heater circuits use a unique high-voltage 18.9V AC supply with series-connected heaters for superior performance. No longer manufactured version existed but was discontinued in favor of this higher-level design; current model actively produced.[3][5][7]