Magnet: AlNiCo V
String Spacing:All 50mm
Resistance: Neck 8.1K, Bridge 8.55K
BB1 : designed for the Neck position, uses Alnico 5 magnets
BB2: designed for the bridge position, uses Alnico 5 magnets
Hence, the pairings you’ll often see are BB1/BB2. 4-wire cord for split purpose