Describe Phil Spector's career and his "Wall of Sound" production style.

What will be an ideal response?

Born in 1940, songwriter, producer, record company owner; "Wall of Sound" created by overdubbing large number of instruments including colorful percussion such as chimes and castanets, monaural recording to avoid separation of sounds; produced many teen idol hits, and produced Beatles' Let it Be and other albums by Harrison and Lennon; Sentenced to 19 years to life in prison in 2009 for the death of Lana Clarkson.