I performed the measurements of the Audio Note Meishu Phono Tonmeister with my Audio Precision SYS2722 system.1 The tubes were already installed when I received the review sample. I removed the cover to check for proper installation. All was well. I waited for 30 minutes after powering up the amplifier before starting the testing.
Looking first at its line inputs, the Meishu Tonmeister preserved absolute polarity, ie, was noninverting, from both the 4 ohm and 8 ohm output transformer taps. The maximum voltage gain at 1kHz was a moderately low 29.65dB from the 4 ohm tap into 8 ohms and 31.3dB from the 8 ohm tap into the same load. The input impedance is specified as 100k ohms. I measured a still-high 77k ohms at 20Hz, 74.5k
