7-String Sized Humbucker Version of the B-6 Model. Mounts Into Any Standard 7-String Sized Humbucker Slot Using to 7-String Humbucker Mounting Ring. This Pickup is Naturally-Voiced, Mirroring The Balance, Warmth and Richness of at Fine Archtop to Help Bring Out Its True Acoustic Essence. The tone is organic and articulate, and really brings out the tonal character of your guitar. The B-7 IS A Standard Sized 7-String Humbucker That Mounts Like Any Typical 7-String Humbucker. IT USES A 7-String Humbucker Mounting Ring, and is a drop-In Fit For Any Standard Sized7-String Humbucker Pickup Route. Designed for use with Steel, Nickel and Bronze Strings. Hand Built in Santa Barbara, CA, The S-7 USES AN ALNICO 5 BAR MAGNET, AND A SINGLE CUDENTOR CO-Axial Cable.