The 4 mm spring plug is the perfect solution for connecting unshielded speaker cables to the amplifier or speaker. The screw connection allows speaker cables to be securely and firmly connected to the receiver or speaker without slipping. Highly flexible due to two different types of termination: straight connection via the plug base or side connection through the center hole. Side termination allows for stacking, enabling the insertion of multiple cables with banana plugs into a single socket, for example, for bi-wiring. Equipped with a spring clamp, the banana plug is also suitable for frequent reconnections, unlike hollow bananas. A red ring serves as a practical color-coded indicator for the positive pole.