简介：Oneiconicblackboxhasprobablymorethananythingelsecometodefinethesoundofrock-theMarshallamplifier.Ithasbeen,quiteliterally,behindsomeofthegreatestnamesinmodernmusic. Itallstartedin1962whendrumshopownerJimMarshalldiscoveredthedistinctivegrowlthatgavetheelectricguitaranexcitingnewvoice.MusicgotawholelotlouderasyoungmusicianslikeClapton,TownshendandHendrixadoptedtherevolutionary'MarshallSound'.Theelectricguitarnowspokeforanewgenerationandthegenreofrockwasborn. SoonMarshallstacksandwallswereanessentialbackdropofrock'n'roll.Theexcessesofrockmachismoweregloriouslylampoonedinthe1984movieThisisSpinalTap.Inanextrodinarypieceofreverseirony,itwasthiscomicexposurethatrescuedthecompanyfromfinancialmeltdown. WithcontributionsfromrocklegendslikePeteTownshend,LemmyandSlash,plusaninterviewwiththe'FatherofLoud'JimMarshall,thisdocumentarycruisesdowntherockageswithallthedialssetto'eleven'.…