We have made significant upgrade to the AMG STA and decided to release it as AMG STA-SE
(
https://nuprimeaudio.com/product/amg-sta-se/)
Given that the AMG One is considered a mini Evolution Two, we felt that there is room for improvement with AMG STA.
The product page details all the changes we have made on the amp board and power supply related circuits. The exceptionally smooth sound characteristic of the AMG STA-SE sets it apart from other top NuPrime amps like the AMG One, Evolution STA, and Evolution Two.
This upgrade is not simply some parts changes as there are design changes. There are innovations such as more efficient and precise PWM waveform (all our amps are self-oscillating using music to trigger the SOA circuit to create PWM waveform, we don't use PWM generator), power circuit noise rejection, and dynamic power delivery.
Existing customers can contact your distributor for upgrade (the $499 upgrade kit consists of amp board, power circuit module, and STA-SE serial number). For USA customers, you can request for upgrade through the help desk.
*** my mistake, the upgrade kit cost $599 ***
