Hiki ke māhele ʻia ka mōʻaukala hoʻomohala o ka ʻenehana kani i ʻehā mau pae: tube, transistor, integrated circuit a me field effect transistor.

I ka makahiki 1906, ua hana ʻo American de Forrest i ka transistor vacuum, nāna i hoʻokumu i ka ʻenehana electro-acoustic kanaka. Ua hoʻokumu ʻia ʻo Bell Labs ma 1927. Ma hope o ka ʻenehana manaʻo maikaʻi ʻole, ua komo ka hoʻomohala ʻana i ka ʻenehana leo i kahi au hou, e like me Williamson amplifier ua hoʻohana pono i ka ʻenehana manaʻo maikaʻi ʻole e hōʻemi nui i ka distortion o ka amplifier a hiki i ka 1950s, hiki i ka hoʻomohala ʻana o ka mea hoʻonui i kekahi o nā manawa hoihoi loa, ke ʻano o nā ʻano mea hoʻonui pau ʻole. No ka mea, ʻono a poepoe ke kala kani o ka mea hoʻokani pila, makemake ʻia e ka poʻe hoihoi.

I ka makahiki 1960, ka puka ʻana mai o nā transistors i hoʻokomo i ka heluna nui o ka poʻe leo leo e komo i kahi honua leo ākea. Loaʻa i nā mea hoʻonui transistor nā hiʻohiʻona o ka timbre maʻalahi a neʻe, haʻahaʻa haʻahaʻa, pane alapine ākea a me ka laulā ikaika.

I ka hoʻomaka ʻana o nā makahiki 1960, ua hoʻokomo mua ʻo ʻAmelika Hui Pū ʻIa i nā kaapuni hoʻohui, ʻo ia nā lālā hou o ka ʻenehana leo. I nā makahiki 1970 mua, ua ʻike mālie ʻia nā kaapuni i hoʻohui ʻia e ka ʻoihana kani ma muli o ko lākou kiʻekiʻe kiʻekiʻe, haʻahaʻa kumu kūʻai, liʻiliʻi liʻiliʻi, nui nā hana a pēlā aku. A hiki i kēia manawa, ua hoʻohana nui ʻia nā kaʻapuni leo kiʻiʻoniʻoni mānoanoa a me nā kaapuni hoʻohui ʻia hoʻoikaika hana i nā kaapuni leo.

I ka waena waena o 1970s, ua hana ʻo Iapana i ka paipu ʻōlelo paipai hana mua. No ka mea, loaʻa i ka pahu mana hopena nā hiʻohiʻona o ka paipu electron maʻemaʻe, ka mānoanoa a me ke kala ʻoluʻolu, a me ke ʻano ikaika o 90 dB, THD <0.01% (100KHZ), lilo koke ia i mea kaulana i ka leo. I ka nui o nā mea hoʻonui i kēia lā, hoʻohana ʻia nā transistors hopena i ka hopena hope loa.

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