American Musical Supply is a musical instrument retailer and wholesale supplier based in Oakland, New Jersey. Its web site is ranked as one of the top 500 retail web sites by volume by the journal Internet Retailer.American Musical Supply began as the catalog and Internet division of a Bergen County music business named Victors House of Music. When Victors was leased by competing retailer Guitar Center in 2007, the former Victors owners retained control of AMS and continue to o.perate it as a mail order and web businessAmerican Musical Supply is a musical instrument retailer and wholesale supplier based in Oakland, New Jersey. Its web site is ranked as one of the top 500 retail web sites by volume by the journal Internet Retailer.American Musical Supply began as the catalog and Internet division of a Bergen County music business named Victors House of Music. When Victors was leased by competing retailer Guitar Center in 2007, the former Victors owners retained control of AMS and continue to o.perate it as a mail order and web business