HiFi speakers plus surround and center are useless. hifi is the English abbreviation of high-fidelity audio. It only has two left and right channels to form stereo sound. It does not have output interfaces for surround speakers and center speakers. If you force the surround speakers and center speakers to be connected to the stereo output of hifi speakers, Even though you cannot hear the surround sound, it may also cause damage to the amplifier by increasing the load on the hifi.