# QED Reference Digital Audio 40 RCA Cable

The QED Reference Digital Audio 40 is a high-performance digital coaxial cable designed to deliver precise signal transfer between digital audio components such as CD transports, streamers, DACs and AV receivers.

Engineered with a carefully optimised coaxial geometry, it maintains the correct 75-ohm impedance required for accurate S/PDIF signal transmission, helping preserve timing accuracy and minimise signal loss.

Silver-plated oxygen-free copper conductors provide excellent conductivity and low resistance for high-frequency digital signals, while high-quality shielding helps protect the signal from electrical interference.

The cable is finished with QED’s precision digital coaxial plugs, designed to closely match the cable’s impedance and improve signal integrity, making it an excellent upgrade for high-quality hi-fi and home cinema systems.

## Details

- **Price:** 99.95 GBP - 129.95 GBP
- **Vendor:** QED
- **Type:** Cables
- **Tags:** BLACK5

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 0.6M | 99.95 GBP | In stock |
| 1M | 109.95 GBP | In stock |
| 3M | 129.95 GBP | In stock |

## Images

- QED Reference Digital Audio 40 RCA Cable - K&B Audio

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> Source: [K&B Audio](https://www.kbaudio.co.uk/products/qed-reference-digital-audio-40-rca-cable)
> Updated: 2026-05-04