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Supra EFF-ISL RCA
RCA interconnect with EFF conductors and locking plugs.
EFF-ISL is Supra's analog RCA interconnect. Its silver-plated copper EFF (Equalized Frequency Flow) conductors are built as tubes around a plastic core to limit skin effect, with low-capacitance PE insulation and an aluminised foil shield. Supra's fully shielded PPSL plugs lock onto the socket.
From CHF 149 per pair
Incl. import & VAT
Delivery quoted separately, or free pickup in Lutry by appointment.
Stereo pair from CHF 149 (0.5 m); 1 m CHF 169, 1.5 m CHF 189, 2 m CHF 209, longer lengths up to 6 m.
What it solves
Engineered to deliver accurate sound in real rooms, not just anechoic chambers.
EFF conductors
Tube-shaped, silver-plated conductors keep the impedance even across the audio band by limiting skin effect.
Low capacitance, shielded
PE insulation keeps capacitance low, and an aluminised foil shield rejects radio-frequency interference.
Locking RCA plugs
Fully shielded SUPRA PPSL plugs lock onto the socket for a firm, lasting contact.
Specifications
| Type | Analog RCA interconnect, stereo pair |
| Conductors | EFF, silver-plated copper |
| Insulation | PE, low capacitance |
| Shield | Aluminised PET foil |
| Connectors | SUPRA PPSL, fully shielded, locking |
| Lengths | 0.5 - 6 m |
| Made in | Sweden |
Specs from Supra Cables's website, checked October 2026.
What's included
- Stereo pair of RCA cables
Frequently asked questions
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