Strymon Zuma R300 Ultra Low Profile DC Power Supply On Sale being the most relevant differences

being the most relevant differences the hi frequency shelving ( 12Khz instead of 10Khz ) and the equalizer´s mid band

Balanced Lo-Z outputs with switchable isolation

it offers the maneuverability of the former

The YEP-642 leads the standard in professional euphoniums

Strymon Zuma R300 Ultra Low Profile DC Power Supply On Sale being the most relevant differencesZuma R300 is the highest horsepower, most technologically advanced low profile effects pedal power supply. You get clean, rock steady power for your 9V, 12V and 18V effects pedals in a pedalboard friendly, expandable package, giving you room to grow. Zuma R300s ultra low profile design means that it can fit under just about any pedalboard. Dual stage topology, pre regulated outputs, optically isolated feedback, and advanced multistage filtering result