TOPPING PRE90 + EXT90 Preamp and Input Extender (Apos Certified Refurbished)

A preamp and input extender for the TOPPING 90 stack The TOPPING A90 and D90 are a universally-adored DAC/amp stack that have received rave reviews across the audiophile world. Joshua Valour called the A90 the “best test-bench amplifier” he’d ever experienced, while DMS praised it for being “a reference standard” he could count on.  The Pre90 and Ext90 are a preamplifier and input extender that take the 90 stack to a whole new level. Together, they allow you to connect up to six additional sources, output to additional amps (such as a tube amp), and more--essentially transforming the 90 stack into the Grand Central Station of audiophile setups.  Fully balanced preamp with +16dB gain The Pre90 is a fully-balanced amplifier that uses the same NFCA (nested feedback composite amplifier) scheme as the A90, delivering a dynamic range of 145dB and no audible noise. With +16dB of maximum gain, it can amplify the weakest of signals into the receiving amplifier.  Run two amps from the Pre90 Th