Ruth's sister
Ruth's sister 25A Transparent 520 Crystal Gold-plated 4mm M4 Banana Socket Terminal internal power cable
Two gold-plated copper banana sockets with crystal insulators, rated 25 A and 4 mm wire holes for amplifier or speaker chassis wiring
- Gold-plated pure copper for low-distortion signal transfer
- Transparent crystal housing resists oxidation over time
- 25 A current rating handles high-power amplifier chassis
- 4 mm radial and axial wire holes suit M4 screw terminals
- 32 mm total length fits 5–6.8 mm panel cut-outs
Premium Crystal Terminals
These gold-plated banana socket terminals are built for enthusiast DIY audio projects. Each piece features a transparent crystal housing over a pure copper core designed for low distortion and oxidation resistance. The 25 A rating supports high-current amplifier and speaker connections. A pair is included for stereo wiring.
DIY Amplifier Builders
Suits hobbyists upgrading power amplifier chassis terminals or speaker binding posts with a 4 mm wire hole. The M4 screw shaft measures 12 mm long and 4 mm wide for secure panel mounting. Builders who need a different total length should note that a 42 mm variant exists separately. Installers without a 5–6.8 mm panel cut-out will need to modify their chassis.
4 mm Dual-Axis Wire Entry
Both radial and axial wire holes accept 4 mm conductors for flexible routing inside tight enclosures. The insulator outer diameter is 6.6 mm and the screw outer diameter is 7 mm. Total length is 32 mm with a 14.5 mm outer diameter.
Highlights
- Gold-plated pure copper for low-distortion signal transfer
- Transparent crystal housing resists oxidation over time
- 25 A current rating handles high-power amplifier chassis
- 4 mm radial and axial wire holes suit M4 screw terminals
- 32 mm total length fits 5–6.8 mm panel cut-outs
Specifications
No published specifications for this item yet.
Questions about this item
What chassis opening diameter is needed to mount the 4 mm banana socket terminals?
The recommended chassis opening is 5–6.8 mm to fit the 6.6 mm insulator and 4 mm screw shaft.
Will the gold-plated copper terminals connect reliably to older speaker wire with standard 4 mm banana plugs?
Yes, both radial and axial wire holes accept 4 mm banana plugs, and the gold-plated copper contacts maintain low resistance with legacy cables.
How can I verify the terminals are seated correctly after installation?
Check that the 12 mm screw shaft is fully engaged, the 14.5 mm outer flange sits flush against the chassis, and the red/black pair shows no visible gaps.
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