Front view — side by side at true scale
ACastle Windsor DukeBFocal Kanta N°1
| A | B | |
|---|---|---|
| Manufacturer | Castle | Focal |
| Model | Castle Windsor Duke | Focal Kanta N°1 |
| Height | 470 mm | 422 mm |
| Width | 280 mm | 236 mm |
| Depth | 346 mm | 391 mm |
| Weight | 13.5 kg | 14 kg |
| Enclosure | bass-reflex-rear | bass-reflex-rear |
| Drivers | 1× 200 mm mid-bass (woven polypropylene), 1× 28 mm tweeter (micro-fibre dome) | 1× 27 mm tweeter (pure beryllium inverted dome), 1× 165 mm mid-bass (flax cone) |
| Frequency — low | 52 Hz | 46 Hz |
| Frequency — high | 22000 Hz | 40000 Hz |
| Sensitivity | 90 dB | 88 dB |
| Impedance | 8 Ω | 8 Ω |
| Recommended amp | 30–150 W | 25–150 W |
| MAP (USD) | $5,760 / pair | $5,999 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | castle.uk.com ↗ | focal.com ↗ |
| Product page | Open product page ↗ | Open product page ↗ |
Larger value highlighted in green. For low-frequency extension, lower Hz = greater bass reach, so the deeper side is highlighted.

