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: 18.5 in · 1 in = 30.26 px
Dynaudio Contour 20ivsCastle Windsor Duke
The Castle Windsor Duke stands 47.0 cm tall — about 3.0 cm more than the Dynaudio Contour 20i at 44.0 cm. On footprint the Castle Windsor Duke is the wider cabinet (28.0 cm versus 21.5 cm). At 90 dB against 86 dB, the Castle Windsor Duke is the easier load to drive and plays louder from the same amplifier. The Dynaudio Contour 20i reaches deeper in the bass, down to 39 Hz versus 52 Hz. Low frequencies come from a 180 mm cone on the Dynaudio Contour 20i and a 200 mm cone on the Castle Windsor Duke. Both land in a similar price bracket, around $5,505 a pair.
| A | B | |
|---|---|---|
| Manufacturer | Dynaudio | Castle |
| Model | Dynaudio Contour 20i | Castle Windsor Duke |
| Height | 17.3 in | 18.5 in |
| Width | 8.5 in | 11 in |
| Depth | 15.6 in | 13.6 in |
| Weight | 30.9 lb | 29.8 lb |
| Enclosure | bass-reflex-rear | bass-reflex-rear |
| Drivers | 1× 1.1 in tweeter (Esotar 2i soft dome with Hexis), 1× 7.1 in mid-bass (MSP cone) | 1× 7.9 in mid-bass (woven polypropylene), 1× 1.1 in tweeter (micro-fibre dome) |
| Frequency — low | 39 Hz | 52 Hz |
| Frequency — high | 23000 Hz | 22000 Hz |
| Sensitivity | 86 dB | 90 dB |
| Impedance | 4 Ω | 8 Ω |
| Recommended amp | — | 30–150 W |
| MAP (USD) | $5,250 / pair | $5,760 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | dynaudio.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.