Switchcraft   speaker twist chassis connector

Switchcraft   speaker twist plug, haakse plug

Neutrik   Speakon plug, 4-pole

Neutrik   Speakon chassis connector, 4-polig, vierkant

Boston   speaker plug, female, 4-polig

Boston   speaker plug, female, 8-polig

Boston   speaker chassis conn, 4-polig, male, rechthoekig model, 25 x 30mm

Boston   speaker chassis conn, 4-polig, male, rond model, 50mm diameter

Boston   speaker chassis conn, 4-polig, male, rond model, 40 x 40mm