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References
Front view — side by side at true scale
AELAC Debut Reference DFR52BCastle Avon 4
ELAC Debut Reference DFR52vsCastle Avon 4
The ELAC Debut Reference DFR52 stands 101.6 cm tall — about 6.1 cm more than the Castle Avon 4 at 95.5 cm. On footprint the ELAC Debut Reference DFR52 is the wider cabinet (23.4 cm versus 18.0 cm). At 89 dB against 87 dB, the Castle Avon 4 is the easier load to drive and plays louder from the same amplifier. The ELAC Debut Reference DFR52 reaches deeper in the bass, down to 42 Hz versus 45 Hz. The ELAC Debut Reference DFR52 is front-ported and the Castle Avon 4 is a transmission line.
| A | B | |
|---|---|---|
| Manufacturer | ELAC | Castle |
| Model | ELAC Debut Reference DFR52 | Castle Avon 4 |
| Height | 1016 mm | 955 mm |
| Width | 234 mm | 180 mm |
| Depth | 242 mm | 310 mm |
| Weight | 16.7 kg | 17.6 kg |
| Enclosure | bass-reflex-front | transmission-line |
| Drivers | 1× 25 mm tweeter (soft dome), 3× 133 mm woofer (aramid-fibre cone) | 1× 130 mm woofer, 1× 115 mm midrange, 1× tweeter (ribbon) |
| Frequency — low | 42 Hz | 45 Hz |
| Frequency — high | 35000 Hz | 20000 Hz |
| Sensitivity | 87 dB | 89 dB |
| Impedance | 6 Ω | 8 Ω |
| Recommended amp | — | 25–100 W |
| MAP (USD) | $1,598 / pair | — |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | elac.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.

