Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Ịgafe: N'ụdị ịkụ aka abụọ, ndị na-akụ egwú bass na-eji aka abụọ akpọ ụda ndị dị na fretboard site n'ịkụgide ma jide eriri ahụ ngwa ngwa. Kama ịpị ma ọ bụ ịpị ụdọ ahụ iji mepụta ụda, na usoro a, ime ihe nke ịkụ ụdọ ahụ megide fret ma ọ bụ fretboard na-emepụta ụda ahụ. Ebe ọ bụ na a pụrụ iji aka abụọ kụọ egwú na fretboard, nke a na-eme ka o kwe omume igwu egwu ndị na-agbagọ agbagọ, igwu egwu bass na chord dị mfe n'otu oge, ma ọ bụ igwu egwu chords na arpeggios. Onye bassist John Entwistle nke The Who kụrụ aka na eriri, na-eme ka ha kụọ fretboard na ụda twangy iji mepụta ụdị ụda. Ndị egwu ama ama maka usoro a gụnyere Cliff Burton, Billy Sheehan, Stuart Hamm, John Myung, Victor Wooten, Les Claypool, Mark King, na Michael Manring. Chapman Stick na Warr Guitars bụ ngwá egwú nwere eriri e mere kpọmkwem iji jiri aka abụọ kụọ aka.  Ajụjụ: Ònye ji usoro a mee ihe?
Cliff Burton, Billy Sheehan, Stuart Hamm, John Myung, Victor Wooten, Les Claypool, Mark King, na Michael Manring