Hadadden na'urar kara hasken wutar lantarki ana kiran shi azaman saiti. Aikin hadewar kayan karawa shi ne kara karfin siginar lantarki mara karfi da aka aiko ta hanyar zangon-gaba, da kuma samar da isasshen karfin da zai iya fitar da mai magana don kammala jujjuyawar wutar lantarki. Hadadden amfilifa ana amfani dashi ko'ina cikin da'irorin kara amfilifa mai karfi na sauti saboda sauƙaƙan kewayen kewaye da saurin yaudara.

Kayan da aka saba amfani dasu sun hada da LM386, TDA2030, LM1875, LM3886 da sauran nau'ikan. Outputarfin fitarwa na haɓakar amfilifa ya fito ne daga ɗaruruwan milliwatts (mW) zuwa ɗaruruwan watts (W). Dangane da ƙarfin fitarwa, ana iya raba shi zuwa ƙarami, matsakaici da ƙarfi masu kara ƙarfi; gwargwadon yanayin aiki na bututun kara karfi, ana iya raba shi Ajin A (A Ajin), Ajin B (Class B), A da A da B (Ajin AB), Class C (Class C) da Class D (Class D). Kayan kara ƙarfi A na da ƙaramar murdiya, amma ƙarancin aiki, kusan kashi 50%, da babbar asara. Ana amfani da su gaba ɗaya a cikin kayan gida na ƙarshen zamani. Masu kara wutar lantarki na Ajin B suna da inganci sosai, kusan kashi 78%, amma rashin fa'ida shine cewa suna iya fuskantar karkatacciyar hanya. Karafan A da B suna da fa'idodi na ingancin sauti mai kyau da inganci sosai na masu kara A, kuma ana amfani dasu sosai a cikin gida, ƙwararru, da kuma tsarin jiyo sauti na mota. Akwai karancin masu kara karfin wutar lantarki na Class C saboda yana kara karfi ne tare da matukar murdiya, wanda ya dace da dalilan sadarwa kawai. Hakanan ana kiransa mai kara ƙarfin ikon odiyo na D. Amfanin shine cewa ingancin shine mafi girma, ana iya rage wutar lantarki, kuma kusan ba a samar da zafi ba. Sabili da haka, babu buƙatar babban radiator. Theara da ƙimar jiki sun ragu sosai. A ka'idar, murdiya ba ta da kyau kuma layin layi yana da kyau. Aikin wannan nau'in kara ƙarfin wutar yana da rikitarwa, kuma farashin ba mai rahusa bane.

Ana kiran na'urar kara karfi a matsayin mai kara karfi a takaice, kuma mahimmancin sa shine samar da kayan da karfin isashshe na yanzu don samun karfin kara karfi. Aikin kara ƙarfin wutar lantarki yana aiki a cikin yanayin kashewa. A ka'ida, baya buƙatar halin yanzu kuma yana da ƙwarewa sosai.

Siginar shigar da sauti na ruwa mara motsi da siginar igiya mai kusurwa uku tare da mita mafi girma ana daidaita su ta mai gwadawa don samun siginar sauyawar PWM wanda aikinta yake daidai da girman siginar shigarwa. Alamar canzawa ta PWM tana motsa bututun wutar fitarwa don aiki a cikin yanayin kashewa. Thearshen fitowar bututun yana samun siginar fitarwa tare da zagayowar aiki na yau da kullun. Ofimar siginar fitarwa ita ce ƙarfin wutar lantarki kuma tana da ƙarfin tuki mai ƙarfi a halin yanzu. Bayan yanayin sigina, siginar fitarwa ta ƙunshi duka siginar shigarwa da mahimman abubuwan haɗin igiyar triangle ɗin da aka tsara, da kuma manyan abubuwan jituwa da haɗuwarsu. Bayan LC mai saurin wucewa, an gyara abubuwan da suka hada da mitar a cikin siginar fitarwa, kuma siginar tazarar mitowa tare da mita iri ɗaya da kuma ƙarfi kamar na siginar sauti na asali ana samun su akan kaya.