The volume is adjusted by adjusting the amplifier signal output of the volume control to the speakers. All Backaudio volume controls are manufactured using a high quality autoformer design which provides long life, excellent frequency response, no heat build-up, and maximum power transfer from the amplifier to the speakers. All Backaudio volume controls conform to UL Standard 1492 First Addition, and for Canada, certified to CSA Standard 22.2 No. 1-M94. This certification assures that Backaudio volume controls are designed and tested for safety. |