aw99Download scientific diagram | Typical 1st bond SEM images of the AW99 wire at 50µm pad pitch. from publication: Development of New Ultra-hh Stiffness Gold Bonding Wire | Driven byMahaffay amplifiers AW99 2 output Guitar Amplifier Head Hand Built in the USA. this is a older model amp -- we do not know the year . Condition is very good . there is a slht crack in