Q: I’m thinking about getting an Ebtech Hum X to use with my guitar amplifier, to solve a ground loop problem I’m having with my pedalboard. I see that it is rated up to six amps of current. Is that enough to handle most guitar amplifiers?
A: Most guitar amplifiers, even large tube models, draw less than six amps. In checking many of the amplifiers we have in stock here at Sweetwater, we’re finding the high end of the current draw to be between 3 and 4 amps.
However, it would be wise to verify the amount of current your amplifier draws, just to be safe. According to our friend Bill Wensloff at Ebtech, there are three ways to get a good idea of your amp’s draw:
1. Many amplifiers list the current rating (in amps) on the back panel.
2. Check the fuse rating. If the fuse is rated under six amps, you’re safe with the Hum X.
3. If you can’t find the amplifier’s rating or the fuse rating, there probably will be an AC input wattage rating on the back panel. Since wattage (power) equals current times voltage, you can divide the wattage by the AC voltage (120 volts in the U.S.) to calculate the current draw.
