TrueScaleAudio
Compare speakers at true scale
Pick two speakers and see them side by side at their real-world size.
Front view — overlaid at true scale
Click either cabinet to swap A ↔ B · Reference height: 980 mm (98.0 cm) · 1 mm = 0.57 px
Cambridge Audio SX-80vsCastle Knight 3
The Cambridge Audio SX-80 stands 98.0 cm tall — about 16.0 cm more than the Castle Knight 3 at 82.0 cm. On footprint the Cambridge Audio SX-80 is the wider cabinet (23.4 cm versus 16.5 cm). At 88 dB against 87 dB, the Castle Knight 3 is the easier load to drive and plays louder from the same amplifier. The Castle Knight 3 reaches deeper in the bass, down to 38 Hz versus 40 Hz. Low frequencies come from a 165 mm cone on the Cambridge Audio SX-80 and a 130 mm cone on the Castle Knight 3. Both land in a similar price bracket, around $785 a pair.
| A | B | |
|---|---|---|
| Manufacturer | Cambridge Audio | Castle |
| Model | Cambridge Audio SX-80 | Castle Knight 3 |
| Height | 980 mm | 820 mm |
| Width | 234 mm | 165 mm |
| Depth | 338 mm | 265 mm |
| Weight | 16.9 kg | 10.7 kg |
| Enclosure | bass-reflex-front | transmission-line |
| Drivers | 1× 25 mm tweeter (silk dome), 2× 165 mm mid-bass (treated paper cone) | 1× 130 mm mid-bass, 1× 25 mm tweeter (soft dome) |
| Frequency — low | 40 Hz | 38 Hz |
| Frequency — high | 20000 Hz | 24000 Hz |
| Sensitivity | 87 dB | 88 dB |
| Impedance | 8 Ω | 8 Ω |
| Recommended amp | — | 15–100 W |
| MAP (USD) | $799 / pair | $770 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | cambridgeaudio.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.