Boutique amp builder Dan Boul explains how he coaxed classic tube-amp tones from the SpiderĀ® V 120 MkII in this behind-the-scenes video, accompanied by guitarist Steve Fekete. Why do particular amplifiers sound and behave the way they do? Boul shares his expert knowledge of tube amplifier characteristics, culled from decades of experience with amp design and performance, including 17 years at the helm of 65 Amps.