[Ynze] has built an audio amplifier that looks and sounds great ... [Ynze] is using a large toroid transformer to drop his local 230V mains down to +25V and -25V. The amplifier circuit itself ...

The HiFiMAN SERENADE Wireless DAC/Headphone Amplifier offers lossless streaming over Wi-Fi for $200 less than its predecessor ...

Starting at $2,995, the Fezz Audio Equinox Vacuum Tube DAC is the most affordable ... Fezz/Toroidy engineers designed a dedicated, supreme-class toroidal power transformer for use as Equinox’s power ...

so [ElectroBoy]’s dual voltage PSU board for audio amplifiers is worth a second look. This type of linear power supply has an extremely simple circuit consisting of a transformer, bridge ...