Lapho ukhetha i-amplifier yamandla, kufanele uqale unake ezinye zezinkomba zayo zobuchwepheshe:

1.Impedance yokufaka: imvamisa ikhombisa usayizi wekhono lokulwa nokuphazanyiswa kwesikhulisi samandla, imvamisa phakathi kuka-5000-15000Ω, inani likhudlwana, amandla okulwa nokuphazamiseka anamandla;

2. Izinga lokuhlanekezela: libhekisa ezingeni lokuhlanekezelwa kwesiginali yokukhipha uma iqhathaniswa nesiginali yokufaka. Inani elincane, ngcono ikhwalithi, imvamisa ingaphansi kuka-0.05%;

3. I-Signal-to-noise ratio: isho isilinganiso esiphakathi kwesiginali yomculo nesiginali yomsindo esigneni yokukhipha. Inani elikhudlwana, umsindo uyahlanzwa. Ngaphezu kwalokho, lapho uthenga i-amplifier yamandla, kufanele ucacise izinhloso zakho zokuthenga. Uma ufuna ukufaka i-subwoofer, kungcono ukuthenga isikhulisi samandla esineziteshi ezinhlanu. Imvamisa izikhulumi ezi-2 neziteshi ezine zingashayela kuphela izipikha zangaphambili nangemuva, kuyilapho i-subwoofer kuphela Ingafakelwa esinye isikhulisi samandla, isikhulisi samandla esineziteshi ezinhlanu singaxazulula le nkinga, namandla okukhipha kwesikhulisi samandla kufanele ibe nkulu kunamandla alinganisiwe esikhulumi ngangokunokwenzeka.