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Compare speakers at true scale

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

Speaker A
Speaker B
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References

Front view — side by side at true scale

ACastle Avon 4BQuad S-4
Castle Avon 4 front view
Quad S-4 front view

Click either cabinet to swap A ↔ B · Reference height: 955 mm (95.5 cm) · 1 mm = 0.59 px

Castle Avon 4vsQuad S-4

The Castle Avon 4 stands 95.5 cm tall — about 8.5 cm more than the Quad S-4 at 87.0 cm. At 89 dB against 88 dB, the Castle Avon 4 is the easier load to drive and plays louder from the same amplifier. The Castle Avon 4 is a transmission line and the Quad S-4 is loaded by a passive radiator.

TrueSpecs presentation

Specifications

mm / kgin / lb
AB
ManufacturerCastleQuad
ModelCastle Avon 4Quad S-4
Height955 mm870 mm
Width180 mm180 mm
Depth310 mm300 mm
Weight17.6 kg20.5 kg
Enclosuretransmission-linepassive-radiator
Drivers1× 130 mm woofer, 1× 115 mm midrange, 1× tweeter (ribbon)1× tweeter (ribbon), 1× 100 mm midrange (woven Kevlar cone), 2× 125 mm woofer (woven Kevlar cone)
Frequency — low45 Hz44 Hz
Frequency — high20000 Hz23000 Hz
Sensitivity89 dB88 dB
Impedance8 Ω6 Ω
Recommended amp25–100 W40–200 W
MAP (USD)—$1,499 / pair
Where to buyCheck availability ↗Check availability ↗
Brand websitecastle.uk.com ↗quad-hifi.co.uk ↗
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.