Front view — side by side at true scale
ACastle Knight 4BFyne Audio F303i
Click either cabinet to swap A ↔ B · Reference height: 962 mm (96.2 cm) · 1 mm = 0.58 px
| A | B | |
|---|---|---|
| Manufacturer | Castle | Fyne Audio |
| Model | Castle Knight 4 | Fyne Audio F303i |
| Height | 900 mm | 962 mm |
| Width | 165 mm | 233 mm |
| Depth | 270 mm | 308 mm |
| Weight | 12.5 kg | 14.6 kg |
| Enclosure | transmission-line | bass-reflex-rear |
| Drivers | 2× 130 mm mid-bass, 1× 25 mm tweeter (soft dome) | 1× 25 mm tweeter (titanium dome), 2× 150 mm mid-bass (multi-fibre cone) |
| Frequency — low | 36 Hz | 32 Hz |
| Frequency — high | 24000 Hz | 34000 Hz |
| Sensitivity | 90 dB | 91 dB |
| Impedance | 8 Ω | 8 Ω |
| Recommended amp | 25–150 W | 30–120 W |
| MAP (USD) | $1,020 / pair | $1,016 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | castle.uk.com ↗ | fyneaudio.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.