The early rock bands of the 1960s used the PA system only for vocals. The electric guitarist and electric bassist had to produce their sound for the hall, club or other venue with their own amplifiers and speaker cabinets. As a result, bass players from the 1960s often used large, powerful amplifiers and large speaker cabinets. Some bass players would even use multiple bass amplifiers, with the signal from one bass amp being sent to one or more "slave" amps. In the mid-1960s John Entwistle (The Who) was one of the first major players to make use of Marshall stacks. At a time when most bands used 50- to 100-watt amplifiers with single cabinets, Entwistle used twin stacks with new experimental prototype 200-watt amplifiers. This, in turn, also had a strong influence on the band's contemporaries at the time, with Jack Bruce of Cream and Noel Redding of the Jimi Hendrix Experience both following suit.