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References
Front view — side by side at true scale
ACastle Avon 1BKEF Q1 Meta
Castle Avon 1vsKEF Q1 Meta
The Castle Avon 1 stands 32.0 cm tall — about 1.8 cm more than the KEF Q1 Meta at 30.2 cm. At 87 dB against 86 dB, the Castle Avon 1 is the easier load to drive and plays louder from the same amplifier. The KEF Q1 Meta reaches deeper in the bass, down to 51 Hz versus 60 Hz. The Castle Avon 1 is a transmission line and the KEF Q1 Meta is rear-ported.
| A | B | |
|---|---|---|
| Manufacturer | Castle | KEF |
| Model | Castle Avon 1 | KEF Q1 Meta Meta |
| Height | 12.6 in | 11.9 in |
| Width | 7.1 in | 7.1 in |
| Depth | 10.2 in | 10.9 in |
| Weight | 12.8 lb | 13.4 lb |
| Enclosure | transmission-line | bass-reflex-rear |
| Drivers | 1× 5.1 in mid-bass, 1× tweeter (ribbon) | 1× 1 in tweeter (MAT aluminium dome), 1× 5.1 in mid-bass (aluminium cone) |
| Frequency — low | 60 Hz | 51 Hz |
| Frequency — high | 20000 Hz | 20000 Hz |
| Sensitivity | 87 dB | 86 dB |
| Impedance | 8 Ω | 4 Ω |
| Recommended amp | 25–100 W | 10–150 W |
| MAP (USD) | — | $749 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | castle.uk.com ↗ | international.kef.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.

