The QED Screwloc ABS 4mm Spade Plugs are a solder-free speaker cable termination from QED, one of the UK's most established cable specialists. Sold as a pack of four (two red, two black), they provide a secure, colour-coded spade connection between amplifier and speaker binding posts.
Screwloc Termination
Each plug uses QED's twin Screwloc mechanism — two internal screws clamp the bare cable conductor firmly in place without soldering, making installation straightforward and repeatable. The clamp suits cable diameters up to 3.25 mm, covering the vast majority of speaker cables on the market.
Duo Spade Contact Design
The termination end uses QED's Duo Spade geometry, which features two contact points designed to seat securely on both standard and wide speaker terminals. This dual-contact approach maintains positive engagement with the binding post regardless of terminal width, delivering a consistent, low-resistance connection across a wide range of amplifiers and speakers.
Construction
The plug body is machined from brass with 24 kt gold plating applied to all contact surfaces — gold offers resistivity nearly as low as copper while resisting the oxidation that degrades unplated connections over time. The outer barrel is moulded in colour-coded ABS plastic (red for positive, black for negative) for quick identification during installation.
| Plug Type | 4 mm spade |
|---|
| Contact Design | Duo Spade (standard and wide terminal compatible) |
|---|
| Contact Plating | 24 kt gold |
|---|
| Body Material | Brass |
|---|
| Barrel Material | ABS plastic (colour-coded) |
|---|
| Termination Style | Twin Screwloc clamp (no soldering required) |
|---|
| Maximum Cable Diameter | 3.25 mm |
|---|
| Pack Contents | 4 plugs (2 red, 2 black) |
|---|
