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MediaFire Download Link: www.mediafire.com/file/golulhrzbl6jvmb/Subwoofer_Break-In_Sweep_40hz-20hz_%2850min%29.mp3/file Recommended actions: Play this for about 2 hours and then let your equipment cool down for 1 hour. Then, do the same again for about 1-2 days. Play at reasonable volumes (no mechanical noise) where you have enough excursion and on every play increase volume slightly. It is highly recommended to free-air the subwoofer driver during the break in so the cone can move freely without air resistance.