Offered here is a premier, beautifully matched quad lot of 4 vintage MULLARD EF86 low-noise audio pentode valves, impeccably preserved in pristine white boxes. Made in Great Britain, these highly sought-after audio tubes feature the classic Silver Cage construction and a high-performance Top Ring Getter configuration, bearing the crisp, original Mullard shield and BVA decals.

Each individual tube has been rigorously verified on our laboratory-grade Amplitrex AT1000 digital tube analyzer. Following the exact formatting layout verified in image’s, the comprehensive data table below provides the full side-by-side factory parameters alongside the laboratory-measured test results.