Front view — side by side at true scale
AHarbeth Compact 7ES-3 XD2BCastle Windsor Duke
| A | B | |
|---|---|---|
| Manufacturer | Harbeth | Castle |
| Model | Harbeth Compact 7ES-3 XD2 | Castle Windsor Duke |
| Height | 520 mm | 470 mm |
| Width | 272 mm | 280 mm |
| Depth | 305 mm | 346 mm |
| Weight | 13.2 kg | 13.5 kg |
| Enclosure | bass-reflex-front | 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 | 45 Hz | 52 Hz |
| Frequency — high | 20000 Hz | 22000 Hz |
| Sensitivity | 86 dB | 90 dB |
| Impedance | 6 Ω | 8 Ω |
| Recommended amp | — | 30–150 W |
| MAP (USD) | $5,290 / 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.

