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Transformer-coupled
so you can comfortably listen longer
Possibility to fine tune the output voltage for the best sound
M12 will reduce the output level and accurately match their impedance
No disturbance
Topping A90 Discrete Balanced Headphone Amplifier & Pre-Amplifier (Discontinued) rtly-do-not-recommend Transformer-coupledThe Topping A90 Discrete Balanced Headphone Amplifier (A90D) is a direct upgrade over it's predecessor, the Topping A90. Featuring a number of quality of life improvements including a R2R volume relay, a remote control, a ground loop noise terminator switch, a 12V trigger interface, a redesigned UI, volume memorization, and more, the A90D is better in every way. As its name suggests, the A90D uses fully discrete components in a complete redesign of
