You CAN hear the difference. Purpose designed Obbligato Premium Film Power Supply Film Caps. Not oil filled. Non-polarized but the black wire should be used as ground and the tabbed end for the B+ rail. Although rated at 47uf/500v these are not like electrolytic's that pop when over voltaged and can be safely used in circuit to rated maximum. Constructed axially for the lowest possible inductance. Wound tight with no voids.

Size (LxD) 112 x 47 mm