Reply To: The power supply is the most important part of an amplifier’s sound

March 12, 2023 at 5:15 pm #5435
Bob Katz

    There are a few reasons why companies are using outboard supplies. One of them is very practical: it costs to get Underwriter’s Labs approval for gear with wall AC inlets. So you can buy an external wall glomper and be UL approved.

    another good reason is for high gain preamps. Locating the power transformer externally reduces the chances of hum induction from the transformer field.