Topping DAC & Headphone Amplifier

Topping Pre90 Preamplifier & Topping Ext90 input extender 2*RCA+4*XLR NFCA FULL Balanced amplifier Relay low noise HIFI Preamp Ultra-High Performance NFCA modules Pre90 uses the similar NFCA (Nested Feedback Composite Amplifier)module from flagship A90. Voltage Current hybrid feedback architecturealong with UHGF (Ultra High Gain Feedback) technology providesexcellent DC and AC performance. Ultra-low noise of 0.3uV is milesahead of the competition, giving an absurdly high dynamic range...