Gear Reviews

Xotic Voltage Doubler & Rubber Knob Cover – guitar effects accessories mini-review in TopGuitar magazine

TopGuitar is proud to inform, that the June issue of the magazine features a mini-review of Xotic Voltage Doubler and Rubber Knob Cover guitar effects accessories. TopGuitar’s gear department editor Maciek Warda performed a test of the products and wrote a short review, summing it up with the following words:

“When buying a piece of gear, it is good to think about little accessories that do not cost much but can make your life considerably easier by raising its comfort. One of such things is Xotic Voltage Doubler.”

The product was delivered for review by the distributor of Xotic in Poland, Warwick Distribution.

The latest issue of TopGuitar magazine is available across Poland in Empik and Ruch press retail networks, in the online store (, and as mobile version for tablets and smartphones using iOS ( or Android ( operating systems.

Xotic Voltage Doubler i Rubber Knob Cover


Published since 2005 as a printed magazine, TopGuitar is a magazine of opinion for professional and amateur musicians. Since 2020 on a digital platform. Contain reviews of various guitar-related musical gear, interviews and original articles on world’s most popular artists, music reviews, event reports, guitar workshops and tips, the latest products and artist news. The Editor-in-Chief is Dr. Dariusz Domanski, a guitarist and academic teacher, doctor of musical arts.