The Arnico 2 magnet and moderate windings allow it to be used without damaging the natural string vibration. The tone is warm and sweet and above it gives you a wonderful sustaine. Compared to SH-1, APH-1 is a slightly round sound and has a soft low frequency response. About Seymour Duncan Humbucker, Zebra Color: When the official imported Zebra is made in Japan, the outside (adjustable pole piece side) is black, the inside (non-adjustable pole piece side) is cream. Please note that this is different from the description in the United States. About Seymour Duncan Humbucker, Zebra Color: When the official imported Zebra is made in Japan, the outside (adjustable pole piece side) is black, the inside (non-adjustable pole piece side) is cream. Please note that this is different from the description in the United States.