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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 — overlaid at true scale

ACastle Knight 4BCastle Knight 3
Castle Knight 4 front view
Castle Knight 3 front view

Click either cabinet to swap A ↔ B · Reference height: 900 mm (90.0 cm) · 1 mm = 0.62 px

Castle Knight 4vsCastle Knight 3

The Castle Knight 4 stands 90.0 cm tall — about 8.0 cm more than the Castle Knight 3 at 82.0 cm. At 90 dB against 88 dB, the Castle Knight 4 is the easier load to drive and plays louder from the same amplifier. The Castle Knight 4 reaches deeper in the bass, down to 36 Hz versus 38 Hz. On price, the Castle Knight 4 sits higher — about $1,020 a pair against $770 for the Castle Knight 3.

TrueSpecs presentation

Specifications

mm / kgin / lb
AB
ManufacturerCastleCastle
ModelCastle Knight 4Castle Knight 3
Height900 mm820 mm
Width165 mm165 mm
Depth270 mm265 mm
Weight12.5 kg10.7 kg
Enclosuretransmission-linetransmission-line
Drivers2× 130 mm mid-bass, 1× 25 mm tweeter (soft dome)1× 130 mm mid-bass, 1× 25 mm tweeter (soft dome)
Frequency — low36 Hz38 Hz
Frequency — high24000 Hz24000 Hz
Sensitivity90 dB88 dB
Impedance8 Ω8 Ω
Recommended amp25–150 W15–100 W
MAP (USD)$1,020 / pair$770 / pair
Where to buyCheck availability ↗Check availability ↗
Brand websitecastle.uk.com ↗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.