Getting authentic tube tone is now easy with the Eden Glowplug. The Glowplug adds warmth and depth to your sound, bringing out your strings natural harmonics using tone circuitry designed to enhance and compliment your bass sound. In addition to adding tube tone the Glowplug has a built in crossover allowing you to adjust where the tube sound is applied. The Mix control allows further detailing - decide how much tube signal you apply to your overall sound. Specs Power Supply: 15v (included) Dimensions: H: 2.1 in / 5.5 cm W: 4.8 in / 12.2 cm D: 3.5 in / 9 cm Weight: 1 lb / 0.47 kg