TOPPING PRE90 + EXT90 Preamp and Input Extender
Note: The EXT90 is currently backordered. A preamp and input extender for the TOPPING 90 stack The Pre90 and Ext90 are a preamplifier and input extender that take the D90/SE 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 The Pre90 can be configured to run to XLR only, RCA only, or XLR+RCA. This final option allows you to run the Pre90 to two different amps, such as an A90 and a DarkVoice 336SE, without having to plug and unplug cables every time you want t