Heavy metal music styles in its early years, but by 1969 vocalist Ian Gillan and guitarist Ritchie Blackmore had led the band toward the developing heavy metal style. In 1970, Black Sabbath and Deep Purple scored major UK chart hits with "Paranoid" and "Black Night", respectively. That same year, two other British bands released debut albums in a heavy metal mode: Uriah Heep with "...Very 'Eavy ...Very 'Umble" and UFO with "UFO 1". Bloodrock released their self-titled debut album, containing a collection of heavy guitar riffs, gruff style vocals and sadistic and macabre lyrics. The influential Budgie brought the new metal sound into
Heavy metal bass large drum kits used in metal, metal bassists typically use large bass speaker cabinets stacked on top of each other–"bass stacks"–powered by high-wattage amplifiers. Traditional heavy metal bands were early users of "bass stacks". Bassist Alex Webster from the death metal band Cannibal Corpse plays with two 8x10 speaker cabinets (each cabinet contains eight 10" speakers). One early bass stack was the 300-watt Super Vacuum Tube (SVT) amplifier head, which was intended for large performance venues. The SVT was intended for use with one or two speaker cabinets containing eight 10" speakers. Some metal bassists use vacuum tube amplifiers, which