What preamp does Dave Murray use?

Dave Murray uses the Marshall JMP-1 preamp. The JMP-1 is a versatile and powerful preamp that offers a wide range of tones, from clean to distorted. It is also known for its ability to produce a very thick and saturated sound. Murray has used the JMP-1 on many of Iron Maiden's albums, including "The Number of the Beast" (1982), "Piece of Mind" (1983), and "Powerslave" (1984). He has also used it on tour with Iron Maiden for many years.

In addition to the JMP-1, Murray also uses a variety of other preamps, including the Marshall JCM800, the Mesa/Boogie Triaxis, and the Soldano SLO-100. He also uses a variety of effects pedals, including the MXR Distortion+, the Boss DS-1, and the Ibanez Tube Screamer.