This is a hybrid design - Class A for warmth and musicality, Class D for power, efficiency and speed. The STA-9 is small by any standards - half normal component width, half the depth of the ST-10 and slim in profile. There are no external heatsinks or front panel switches. All the action is on the rear panel with a set of substantial speaker cable connections, and both balanced and RCA inputs with a selector switch. And for the first time with NuPrime a switch for either stereo or bridged mono operation. The amplifier is rated at 120 watts per channel into 8 ohms stereo or a stonking 290 watts in mono.
"Never before has this level of sound quality and power cost so little."
