Nhoroondo yekugadzirwa kwetekinoroji yeruzha inogona kukamurwa kuita zvikamu zvina: chubhu, transistor, integrated circuit uye field effect transistor.

Muna 1906, American de Forrest yakagadzira vacuum transistor, iyo yakatanga tekinoroji yemagetsi-acoustic yevanhu. Bell Labs yakagadzirwa muna 1927. Mushure me tekinoroji yemhinduro dzisina kunaka, kuvandudzwa kwetekinoroji yeaudio kwapinda munguva itsva, senge Williamson amplifier yakashandisa tekinoroji yemhinduro dzisina kunaka kuderedza zvakanyanya kukanganisa kweamplifier kusvika kuma1950, kuvandudzwa kweamplifier yetube kwakasvika panguva inonakidza zvikuru, maamplifiers akasiyana-siyana anobuda mukusingaperi. Nekuti ruvara rweruzha rweamplifier yetube runotapira uye rwakatenderera, ruchiri kufarirwa nevanofarira.

Mumakore ekuma1960, kubuda kwematransistor kwakaita kuti vanhu vakawanda vanofarira maaudio vapinde munyika yakakura yeaudio. Matransistor amplifiers ane hunhu hwekuti timbre inopfava uye inofamba, kukanganiswa kwakaderera, wide frequency response uye dynamic range.

Mukutanga kwema1960, United States yakatanga kuunza ma "integrated circuits", ayo ari nhengo itsva dzetekinoroji yekuteerera. Mukutanga kwema1970, ma "integrated circuits" aizivikanwa zvishoma nezvishoma neindasitiri yekurira nekuda kwemhando yepamusoro, mutengo wakaderera, vhoriyamu diki, mabasa akawanda nezvimwewo. Kusvika pari zvino, ma "integrated circuits" akakora uye ma "operational amplifier" akasanganiswa akashandiswa zvakanyanya muma "audio circuits".

Pakati pemakore ekuma1970, Japan yakagadzira chubhu yekutanga yekukurudzira kushanda kwesimba remagetsi. Nekuti chubhu yesimba remagetsi ine hunhu hwechubhu yemagetsi yakachena, ruvara rwakakora uye runotapira, uye dynamic range ye90 dB, THD < 0.01% (100KHZ), yakakurumidza kufarirwa mumaaudio. Muma amplifiers mazhinji nhasi, ma transistors emagetsi emagetsi anoshandiswa semhedzisiro yekupedzisira.

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