The H1A features the same design as the H1 but utilizes Alnico V magnets instead of ceramic. The result is a much warmer sound with a full mid-range and a smoother top end, without sacrificing any of the presence or clarity you'd expect from the best vintage humbuckers.
This model utilizes over wound coils and Alnico V magnets to give it the feel and response of an old passive pickup.
In the neck position, the H1A-N has a buttery smoothness that still cuts through. In the bridge position, the H1A-B produces a fat low-end with sparkle and punchy.