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: 38.6 in · 1 in = 14.51 px
Castle Knight 3vsCambridge Audio SX-80
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 130 mm cone on the Castle Knight 3 and a 165 mm cone on the Cambridge Audio SX-80. Both land in a similar price bracket, around $785 a pair.
| A | B | |
|---|---|---|
| Manufacturer | Castle | Cambridge Audio |
| Model | Castle Knight 3 | Cambridge Audio SX-80 |
| Height | 32.3 in | 38.6 in |
| Width | 6.5 in | 9.2 in |
| Depth | 10.4 in | 13.3 in |
| Weight | 23.6 lb | 37.3 lb |
| Enclosure | transmission-line | bass-reflex-front |
| Drivers | 1× 5.1 in mid-bass, 1× 1 in tweeter (soft dome) | 1× 1 in tweeter (silk dome), 2× 6.5 in mid-bass (treated paper cone) |
| Frequency — low | 38 Hz | 40 Hz |
| Frequency — high | 24000 Hz | 20000 Hz |
| Sensitivity | 88 dB | 87 dB |
| Impedance | 8 Ω | 8 Ω |
| Recommended amp | 15–100 W | — |
| MAP (USD) | $770 / pair | $799 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | castle.uk.com ↗ | cambridgeaudio.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.