Harman/Kardon 5. 1 Channel1Kloc-0/Speaker Audio (Harman Kardon Audio) adopted by the new Regal is a very famous top-level audio brand, which can be compared with BOSE! In addition to Buick New Regal and Buick New LaCrosse, cars equipped with Harman Kardon audio also include imported luxury cars such as Mercedes-Benz, BMW 7 Series and Land Rover Range Rover, all of which adopt Harman Kardon's top Harman/Kardon Logic7 audio system. The effect of Logic7 car audio is no less than BOSE, and Mark Levinson, a subsidiary of Harman Kardon Company, is the most widely used in Lexus models. The effect is also very good, and the Rolls-Royce Phantom Lexicon sound is also very good. In terms of strength, Harman Kardon is better than BOSE, and now there are more car brands using Harman Kardon audio than BOSE.