Txoj kev loj hlob keeb kwm ntawm lub suab tshuab yuav muab faib ua plaub theem: raj, transistor, integrated circuit thiab field effect transistor.

Nyob rau hauv 1906, American de Forrest tau tsim lub tshuab nqus tsev transistor, uas pioneered tib neeg electro-acoustic technology. Tswb Labs tau tsim nyob rau xyoo 1927. Tom qab cov kev tawm tswv yim tsis zoo, kev txhim kho ntawm lub tshuab suab tau nkag mus rau lub sijhawm tshiab, xws li Williamson amplifier tau ua tiav siv cov kev tawm tswv yim tsis zoo los txo cov kev cuam tshuam ntawm lub amplifier mus rau xyoo 1950, txoj kev loj hlob ntawm lub raj amplifier tau mus txog ib lub sijhawm zoo siab tshaj plaws, ntau lub raj amplifiers tshwm sim nyob rau hauv qhov kawg. Vim lub suab xim ntawm lub raj amplifier yog qab zib thiab puag ncig, nws tseem nyiam los ntawm cov neeg nyiam.

Nyob rau xyoo 1960, qhov tshwm sim ntawm transistors ua rau cov neeg nyiam suab paj nruag nkag mus rau hauv lub ntiaj teb suab nrov. Transistor amplifiers muaj cov yam ntxwv ntawm ilv thiab txav timbre, tsis tshua muaj distortion, dav zaus teb thiab dynamic ntau yam.

Thaum ntxov xyoo 1960, Tebchaws Meskas thawj zaug qhia txog kev sib koom ua ke, uas yog cov tswv cuab tshiab ntawm lub tshuab suab. Thaum xyoo 1970s, kev sib xyaw ua ke tau maj mam lees paub los ntawm kev lag luam suab nrov vim lawv cov khoom zoo, tus nqi qis, ntim me me, ntau lub zog thiab lwm yam. Txog rau tam sim no, tuab zaj duab xis suab sib xyaw ua ke thiab kev ua haujlwm amplifier integrated circuits tau siv dav hauv suab circuits.

Nyob rau hauv nruab nrab-1970s, Nyiv tau tsim thawj qhov chaw ua haujlwm pom zoo raj. Vim tias lub zog hluav taws xob lub raj muaj cov yam ntxwv ntawm cov raj hluav taws xob ntshiab, cov xim tuab thiab qab zib, thiab ntau yam ntawm 90 dB, THD < 0.01% (100KHZ), nws sai sai tau nrov hauv suab. Nyob rau hauv ntau lub amplifiers niaj hnub no, teb cov nyhuv transistors yog siv los ua qhov kawg tso zis.

 Imported Bass ULF haum rau qhov project

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