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Simple video instruction for beginners about the basics of audio tuning. The result is guaranteed by the author. The topic is soundproofing doors and replacing speakers in a car. Performed by a master with many years of experience. Used materials Shumoff M2 + Germeton A15 + Specifik https://goo.gl/zo3e7r Acoustics Hertz UNO 165 kit https://goo.gl/gR5ZXj Adapter rings Ford set https://goo.gl/mSFQyc Speaker terminals https://goo.gl/Py5KMm Spray paint Masking tape Electrical tape, ties. Mazda6 car