Front view — side by side at true scale
AHarbeth Monitor 30.3 XD2BCastle Windsor Duke
Click either cabinet to swap A ↔ B · Reference height: 470 mm (47.0 cm) · 1 mm = 1.19 px
| A | B | |
|---|---|---|
| Manufacturer | Harbeth | Castle |
| Model | Harbeth Monitor 30.3 XD2 | Castle Windsor Duke |
| Height | 460 mm | 470 mm |
| Width | 277 mm | 280 mm |
| Depth | 275 mm | 346 mm |
| Weight | 11.6 kg | 13.5 kg |
| Enclosure | sealed | bass-reflex-rear |
| Drivers | 1× 25 mm tweeter (ferrofluid-cooled dome), 1× 200 mm mid-bass (RADIAL polymer cone) | 1× 200 mm mid-bass (woven polypropylene), 1× 28 mm tweeter (micro-fibre dome) |
| Frequency — low | 50 Hz | 52 Hz |
| Frequency — high | 20000 Hz | 22000 Hz |
| Sensitivity | 85 dB | 90 dB |
| Impedance | 6 Ω | 8 Ω |
| Recommended amp | — | 30–150 W |
| MAP (USD) | $6,290 / pair | $5,760 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | harbeth.co.uk ↗ | 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.