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Abstract
The article describes the quality improvement program in a speaker company%2C through the implementation of six sigma philosophy; design a quality control system to support the result of the philosophy implementation%2C helped by the house of quality. The improvement of the quality level to 6ã is done by knowing the speaker¡¦s critical to quality (CTQ). The CTQ improved by minimized the highest defect. There are an analysis to six sigma indicator and the quality cost. The result is a quality improvement through the two type of speaker%2C 12¡¨ C-1230 PA ACR Pro New and 12¡¨ 30H120 SRW-38B ACR Pro New.