TrueScaleAudio
Compare speakers at true scale
Pick two speakers and see them side by side at their real-world size.
Front view — side by side at true scale
Click either cabinet to swap A ↔ B · Reference height: 962 mm (96.2 cm) · 1 mm = 0.58 px
Fyne Audio F303ivsCastle Knight 4
The Fyne Audio F303i stands 96.2 cm tall — about 6.2 cm more than the Castle Knight 4 at 90.0 cm. On footprint the Fyne Audio F303i is the wider cabinet (23.3 cm versus 16.5 cm). At 91 dB against 90 dB, the Fyne Audio F303i is the easier load to drive and plays louder from the same amplifier. The Fyne Audio F303i reaches deeper in the bass, down to 32 Hz versus 36 Hz. Low frequencies come from a 150 mm cone on the Fyne Audio F303i and a 130 mm cone on the Castle Knight 4. Both land in a similar price bracket, around $1,018 a pair.
| A | B | |
|---|---|---|
| Manufacturer | Fyne Audio | Castle |
| Model | Fyne Audio F303i | Castle Knight 4 |
| Height | 962 mm | 900 mm |
| Width | 233 mm | 165 mm |
| Depth | 308 mm | 270 mm |
| Weight | 14.6 kg | 12.5 kg |
| Enclosure | bass-reflex-rear | transmission-line |
| Drivers | 1× 25 mm tweeter (titanium dome), 2× 150 mm mid-bass (multi-fibre cone) | 2× 130 mm mid-bass, 1× 25 mm tweeter (soft dome) |
| Frequency — low | 32 Hz | 36 Hz |
| Frequency — high | 34000 Hz | 24000 Hz |
| Sensitivity | 91 dB | 90 dB |
| Impedance | 8 Ω | 8 Ω |
| Recommended amp | 30–120 W | 25–150 W |
| MAP (USD) | $1,016 / pair | $1,020 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | fyneaudio.com ↗ | castle.uk.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.