Review on 🔋 Enhance Audio Performance: Topping P50 Linear Power Supply for Topping D50/D50s/DX3 Pro/A50 Silver by Mark Raj

I used this power supply to power 2 Topping E30 DACs (@ 5V) and a Rolls DA134 (@ 15V ) to be powered - polarity must be reversed! ) . A 5V output was tested while the other two outputs were under load: the Rolls drew only 15mA at 15V and the other E30 drew 321mA at 5V. The 5V output tested showed 5.019V open circuit, 4.953V on E30 idling and 4.948V on E30 running. The E30 drew 275-295mA at idle and 321mA in the working state. At idle or idling, the E30 had 1mV broadband noise when powered from DC - with the E30 running there was about 2mV noise with a period of 300ns (i.e. about 3.333MHz). At 2 x 5V @ 321mA and 1 x 15V @ 15mA the total power is approx. 3.5W. The current draw is 100 mA at 117 VAC (12 W) and the brushed aluminum housing is rated at around 99 degrees Fahrenheit. With this performance, the somewhat sensitive E30 now has absolutely quiet, quiet passages, and the noise level remains below my measurement level even with the gain turned up.