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On this day in music history: October 22, 1969 - Led Zeppelin II, the second album by Led Zeppelin is released. Produced by Jimmy Page, it is recorded at Olympic Studios and Morgan Studios in London; A&M Studios, Quantum Studios, Sunset Sound, Mirror Sound, and Mystic Studios in Los Angeles; A&R Studios, Juggy Sound, Groove Studios, and Mayfair Studios in New York City; "The Hut" in Vancouver, BC, Canada; and Ardent Studios in Memphis, TN from January - August 1969. Quickly following the success of their self-titled debut, the album is written on the road and recorded in numerous studios in the US and UK on days off between tour dates. Led Zeppelin II will quickly surpass their debut in sales, cementing the bands' musical reputation as well as establishing a template in which countless hard rock and heavy metal bands will follow. It will spin off several classics that become rock radio staples including "Heartbreaker," Ramble On," and "Whole Lotta Love" (#4 Pop), the latter of which is issued as a single. The initial US pressing of the LP mastered by Bob Ludwig will be problematic for some as loud and dynamic passages on the record will cause it to skip on cheaper turntables of the day, initiating sizeable returns. Atlantic will be forced to remaster the album (this time by George Marino), with the bass and high end significantly rolled off. These original "loud cut" pressings of II will become sought after by collectors over the years. Led Zeppelin II will spend 7 weeks at #1 (non-consecutive) on the Billboard Top 200, and is certified 12x Platinum in the US by the RIAA.