This is a replacement unit from Apos Audio. Opened but never used. Essentially brand new.
In terms of performance and measurements, the Topping A90 the best headphone amplifier in the world. With THD+N as low as 0.000094%, signal transparency is guaranteed. You will hear everything as it is.
Measurements can be found here.
https://www.audiosciencereview.com/...topping-a90-headphone-amplifier-review.13592/
$400 Shipped in Continental U.S. Buyer pays PayPal fee. (I prefer Venmo or Zelle though.)
The item is in the Bay Area, local pickup can be arranged.
In terms of performance and measurements, the Topping A90 the best headphone amplifier in the world. With THD+N as low as 0.000094%, signal transparency is guaranteed. You will hear everything as it is.
Measurements can be found here.
https://www.audiosciencereview.com/...topping-a90-headphone-amplifier-review.13592/
$400 Shipped in Continental U.S. Buyer pays PayPal fee. (I prefer Venmo or Zelle though.)
The item is in the Bay Area, local pickup can be arranged.
