the sound of the Vox with the Strat, because I think it was more of a raw sound.  The Fender amplifier, to my ear sounded a little too smooth with a Strat, and I seemed to get more guts out of a Vox." Reg Clark worked in the Vox store in London's Charing Cross Road in the early 60's, and credits Hank with instigating a major Vox development : "He suggested we made one with two speakers and it was from that comment that the AC30 came." The Shadows had tried the more powerful Fender Twin, but the Vox AC15 provided the sound they wanted, albeit with insufficient volume.  Using two amplifiers each was rejected, and Vox finally came up with the legendary AC30, with the group taking delivery of four in late 1959.  The AC30 was a 30 watt model with 12" twin speakers and EL84 output valves.  Hank's amp was modified with a treble booster to provide a cleaner sound at high volume levels and this model was later sold commercially as the AC30 Top Boost.  Bruce also used an AC30, without modification, and Jet Harris had a bass model. Hank's first echo machine came from Joe Brown, and was used on the first Shadows LP.  Reg Clark identifies Hank's role : "Hank was one of the first to use an echo unit and because he did, manufacturers took it up ... Hank on his own made what was a small-time thing into big business." For the Shadows