например такой вот
8 pole cable connector, latch lock, chuck type strain relief for cables 8 - 20 mm diameter, 30 A continuous per contact
The industry-standard for loudspeaker connections offer extremely reliable and robust cable connectors with a reliable locking system. They feature solid contacts with screw-type terminals including a stranded wire protection which offer also solder termination.
Features & Benefits
Current rating 30 A rms continuous
Reliable and robust, easy and fast to assemble
Contacts are touch proof and meet all safety requirements (IEC, UL, CSA)
Accurate and dependable twist lock latching system "Quick Lock"
High impact material for insert and housing, long-lasting and dependable
Chuck type strain relief system for secure clamping of cable
но есть и неприятный момент
speakON is NOT to be used as an AC mains or power supply connector!
но думаю это связано не с мощностью