Crutfield Amp Collection built for Crutchfield by Precision Power (PPI) in the very late 80's.  The collection consists of a CR2x30, CR2x50, CR4x50, and CR2x75.  All are in near mint or mint condition.  Also included, but not pictued is a malfunctioning CR2x30).  This collection took me several years to assemble and I am not willing to separate.

 Price $450 + Shiping