Amphenol EP-8-12 8-Pole Male Cable Connector

Amphenol EP-8-12 8-Pole Male Cable Connector

The Amphenol EP-8-12 is an 8-pole male cable connector from Amphenol’s EP series of loudspeaker connectors, a range built around a rugged zinc diecast shell and precision machined, high-current contacts. It is the cable-side plug used to terminate multi-way loudspeaker cable assemblies where several amplifier channels or speaker circuits travel down one lead — for example a bi-amped or multi-driver loudspeaker system wired to a defined pin scheme. The EP series is intermatable across the EP and AP ranges, so this plug mates with the matching EP or AP female cable and chassis connectors that follow the same contact arrangement.

Key features

• 8-pole contact arrangement for multi-circuit loudspeaker wiring in a single connector
• Zinc diecast metal shell in nickel finish for demanding stage and installation use
• Precision machined contacts with solder bucket termination
• 15 A current carrying capacity and 100 V RMS service voltage for the 8-pole arrangement
• Quick release, vibration resistant latch lock
• Cable clamp supports cables from 9 mm to 16 mm in diameter
• Cable flex relief design that reduces bend stress where the cable enters the housing

Construction and electrical ratings

Amphenol publishes the EP standard data by contact count, and the 8-pole figures are the ones that apply here: a service voltage of 100 V RMS, a test voltage of 1300 V AC RMS, and a current carrying capacity of 15 A. Typical contact resistance is 3 milliohms or less, which matters on loudspeaker lines where the connector sits in series with a low-impedance load. The solder buckets accept stranded wire up to 14 AWG in the 8-pole version. The insulator is rated UL94V-0 for flammability, the protection class is IP40, and the operating temperature range runs from minus 25 degrees Celsius to plus 75 degrees Celsius, with a mechanical life of 1000 mating cycles. Amphenol also notes the series is not suitable for domestic applications above 50 V, so it belongs in professional loudspeaker wiring, terminated and checked by someone competent.

Assembly and wiring practice

Because eight contacts can carry several different circuits, the pin scheme must come from the system wiring diagram, not from assumption. Two manufacturers can use the same contact count in completely different ways, and a cable that plugs in is not automatically a cable that is wired correctly. Strip and tin each conductor neatly, solder it into its numbered bucket, and check for stray strands or bridges before closing the shell. Set the cable clamp to grip the jacket firmly, then run continuity and insulation checks on the finished lead and label both ends with the scheme used. That label is what stops a correctly built cable being plugged into a differently wired system later.

Where it is used

The EP-8-12 suits loudspeaker cable assembly and repair for touring, installed sound and studio systems that standardise on the EP/AP family: multi-way active loudspeaker boxes, amplifier rack outputs wired to a single multicore-style speaker lead, and service benches replacing a damaged plug on an existing EP cable. It is a component, not a finished cable, and it does not include a mating connector, so confirm the female EP or AP part and the wiring scheme before ordering parts for a build.

Chosen by the exact part number, assembled carefully and tested before use, the EP-8-12 gives a multi-way loudspeaker lead the same machined-contact, diecast-shell termination the EP series has been specified for in professional audio for decades.