TrueScaleCompare speakers at true scale.
TrueSpecsCompare technical specifications (up to 4 speakers).HiFi LadderBrowse every speaker side by side, ordered by size or by price.HiFi SearchFind speakers by the specs you want.

TrueScaleAudio

Compare speakers at true scale

Pick two speakers and see them side by side at their real-world size.

Speaker A
Speaker B
OverlaySide by side
Presentation mode
References

Front view — side by side at true scale

AHarbeth Monitor 30.3 XD2BCastle Windsor Duke
Harbeth Monitor 30.3 XD2 front view
Castle Windsor Duke front view

Click either cabinet to swap A ↔ B · Reference height: 18.5 in · 1 in = 30.26 px

Harbeth Monitor 30.3 XD2vsCastle Windsor Duke

The Castle Windsor Duke stands 47.0 cm tall — about 1.0 cm more than the Harbeth Monitor 30.3 XD2 at 46.0 cm. At 90 dB against 85 dB, the Castle Windsor Duke is the easier load to drive and plays louder from the same amplifier. The Harbeth Monitor 30.3 XD2 reaches deeper in the bass, down to 50 Hz versus 52 Hz. The Harbeth Monitor 30.3 XD2 is a sealed cabinet and the Castle Windsor Duke is rear-ported. Both land in a similar price bracket, around $6,025 a pair.

TrueSpecs presentation

Specifications

mm / kgin / lb
AB
ManufacturerHarbethCastle
ModelHarbeth Monitor 30.3 XD2Castle Windsor Duke
Height18.1 in18.5 in
Width10.9 in11 in
Depth10.8 in13.6 in
Weight25.6 lb29.8 lb
Enclosuresealedbass-reflex-rear
Drivers1× 1 in tweeter (ferrofluid-cooled dome), 1× 7.9 in mid-bass (RADIAL polymer cone)1× 7.9 in mid-bass (woven polypropylene), 1× 1.1 in tweeter (micro-fibre dome)
Frequency — low50 Hz52 Hz
Frequency — high20000 Hz22000 Hz
Sensitivity85 dB90 dB
Impedance6 Ω8 Ω
Recommended amp—30–150 W
MAP (USD)$6,290 / pair$5,760 / pair
Where to buyCheck availability ↗Check availability ↗
Brand websiteharbeth.co.uk ↗castle.uk.com ↗
Product pageOpen 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.