Lub luag haujlwm ntawm qhov tshwj xeeb
1 Txhim kho lub teeb liab-rau-suab sib piv ntawm lub system (ua ntej lub ntsuas ntes ncaj qha, cov kab sib kis tau luv, kev faib tawm kom muaj peev xwm Cs raug txo qis, thiab qhov teeb liab-rau-suab sib piv tau zoo tuaj)
2. Txo cov kev txheeb ze ntawm kev cuam tshuam sab nraud (lub teeb liab ua ntej ua ntej yog nthuav dav.)
3. Cov txheej txheem tsim nyog, yooj yim los kho thiab siv (kev kho kom haum ua ntej tsis tuaj yeem hloov kho tau, cov ntsiab lus loj ntxiv kev hloov kho ntau yam, tsim tsis tu ncua)
4. Impedance hloov dua siab tshiab thiab sib xws (preamplifier tsim rau cov ntsiab lus siab impedance, tsawg tso zis impedance)