Amplifier valve kits, HIFI pre-amplifiers, speaker kits, AMP Parts, upgrade components | Hifi Collective Hificollective One stop for hifi kits, components hi-fi diyers Build you own valve amps from scratch, dabble in speaker design, a component tweaker or a true beginner. Hificollective uses cookies to give you the best online experiences. By continuing to use our website you are agreeing to our use of cookies. Continue