SIS Assembly

Creates a “better-than-soldered” connection between Evidence Audio’s revolutionary Screw In Solderless connectors and the renowned Monorail cable.



A simple process you will have to do just once for a life-time air tight connection. Yet the plugs can be removed and used again at any time as part of a new or different cable.

As used by David Gilmour,  Noel Gallagher, Ed O’Brian, Graham Coxton, Guthrie Govan, Andy Timmons, Guy Pratt, Steven Rothery, and many others.


Suggested Tools:


Instructions, Tips & Troubleshooting:

1) REMOVE the thin black (conductive) skin from around the white insulation. If it touches where the conductor needs to enter, you’ll create a complete short or partial short with weak signal

2) Attach the first plug to your longer supply of cable before cutting to length. Measure length required to the other plug. Cut, attach the second plug to complete cable. Attach next plug to long supply of cable. Rinse. Repeat.

3) You need the cable to slide in completely with a snug fit. If you have trouble pushing the cable into the plug, don’t twist the shield as much.

4) Wear rubber gloves to get a good grip and spare sore fingers when closing tight.

Right Angle Plugs:



Straight SIS Plugs:

Push the cable into the plug and when you seat the core, rotate the plug about 10-12 full revolutions (straight plug only). This will simultaneously thread the copper core into the tip of the plug and screw the body of the plug onto the cable jacket. Depending how long you’ve left the white part, you may need a couple more or less turns to seat the cable jacket inside the plug. You only need the jacket to enter the plug a few millimeters.


This video offers a guide:


A more detailed discussion of our objective:

The very pure solid IGL copper conductor of the Monorail cable is softer than brass. The SIS plug is made from brass which is a bit harder than copper. (Most good plugs are made from a brass alloy as copper would be too soft for use as a plug). The inside of the tip of the SIS plug is carefully machined to have “threads” of a precise size and pitch.These threads cut and re-shape the soft conductor of the Monorail when turn around it several times.

When you push the prepared cable into the SIS plug, the soft copper will find the hole. When you turn the plug 1 or 2 times the harder brass core of the plug will catch and cut into the copper conductor. When you feel this happen you put the cap in place and screw the SIS plug into the cap. This action:-Turns the soft copper deeper into the SIS core-Mashes the ground up against the SIS body to make ground contact (air tight as the copper is deformed inside pushing air from the connection-Seals the red jacket at the exit tightly so that the cable will not come loose from the plug and the cap will not come loose from the plug body When finished the tip/core connection with the Monorail is also air-tight and in many ways better than a soldered connection. If you unscrew the SIS plug and remove the Monorail cable you can see the soft copper has been shaped to meet with the SIS core.
The photos above show the tip part of the SIS plug (removed from the body), a close-up of the threads inside, and what the conductor of the cable looks like after assembly. Every other solderless system on the market has a “needle” of dubious quality that stabs in-between the strands of a generic coaxial cable for contact.
Here a bicycle hangs from the contact made with the IGL copper conductor screwed into the tip of a SIS plug. Do NOT try this with your grandma or grandpa’s solderless system:


link to pedalboards gallery