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Front view — side by side at true scale
ACastle Knight 5BELAC Debut DF63
Castle Knight 5vsELAC Debut DF63
The ELAC Debut DF63 stands 109.4 cm tall — about 10.9 cm more than the Castle Knight 5 at 98.5 cm. On footprint the ELAC Debut DF63 is the wider cabinet (24.4 cm versus 20.0 cm). At 91 dB against 87.5 dB, the Castle Knight 5 is the easier load to drive and plays louder from the same amplifier. Low frequencies come from a 150 mm cone on the Castle Knight 5 and a 165 mm cone on the ELAC Debut DF63. On price, the Castle Knight 5 sits higher — about $1,280 a pair against $1,099 for the ELAC Debut DF63.
| A | B | |
|---|---|---|
| Manufacturer | Castle | ELAC |
| Model | Castle Knight 5 | ELAC Debut DF63 3.0 |
| Height | 985 mm | 1094 mm |
| Width | 200 mm | 244 mm |
| Depth | 335 mm | 268 mm |
| Weight | 20 kg | 17.6 kg |
| Enclosure | transmission-line | bass-reflex-rear |
| Drivers | 2× 150 mm mid-bass, 1× 25 mm tweeter (soft dome) | 1× 25 mm tweeter (aluminium dome), 1× 165 mm midrange (aramid-fibre cone), 2× 165 mm woofer (aramid-fibre cone) |
| Frequency — low | 30 Hz | 31 Hz |
| Frequency — high | 24000 Hz | 38000 Hz |
| Sensitivity | 91 dB | 87.5 dB |
| Impedance | 8 Ω | 6 Ω |
| Recommended amp | 25–200 W | 30–180 W |
| MAP (USD) | $1,280 / pair | $1,099 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | castle.uk.com ↗ | elac.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.

