<prompt> Yakha inguqulo eyinkimbinkimbi yalesi sigwebo Umthelela we-impedance yesikhulumi uhlukile phakathi kwezikhulisi zeshubhu nezikhulisi ze-transistor.  <response>: Yiqiniso, inguqulo eyinkimbinkimbi yomusho ithi Ithonya le-speaker impedance lihlukile phakathi kwama-amplifiers weshubhu nama-amplifiers we-transistor, ikakhulukazi ngoba ama-amplifiers weshubhu ngokuvamile asebenzisa ama-transformers wokukhipha, futhi awakwazi ukusebenzisa impendulo engalungile ngenxa yezinkinga zesigaba kuma-transformer circuits. 