Short answer: 2 x 0.75 mm² are sufficient for short speaker cables in many cases, but 1.0-1.5 mm² are recommended for better transmission quality and lower power loss with this system.

Explanation and details:
- The system delivers 2 x 60 W RMS; thinner cables (0.75 mm²) work, but lead to slightly more voltage drop and power loss at longer distances or higher volumes, which can be audible.
- Panasonic supplies AWG22 loudspeaker cables as standard (approx. 0.33 mm² per core wire fibre, in practice this corresponds to an effective cross-section of approx. 0.5-0.75 mm²), which shows that the device can also be operated with rather thin cables.
- Recommendation based on practical experience reports and tests: For cable lengths up to approx. 3-5 m, 0.75-1.0 mm² is sufficient; for lengths over ~5 m or if you want maximum volume/signal quality, choose 1.5 mm².
- If you want to use banana plugs or screw terminals: the device accepts both, and thicker cables (1.0-1.5 mm²) can usually be connected without any problems.

Short help to choose:
- Seat close together, cable ≤ 3-5 m → 0.75-1.0 mm² sufficient.
- Cable > 5 m or desire for the best possible sound at high levels → 1.5 mm².
- Ensure a clean contact (stripped/not frayed) or use suitable banana/fork terminals for a secure connection.