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References
Front view — overlaid at true scale
ATriangle BR09BCastle Avon 5
Triangle BR09vsCastle Avon 5
The Castle Avon 5 stands 111.0 cm tall — about 1.5 cm more than the Triangle BR09 at 109.5 cm. On footprint the Triangle BR09 is the wider cabinet (25.4 cm versus 21.0 cm). At 92 dB against 89 dB, the Triangle BR09 is the easier load to drive and plays louder from the same amplifier. Low frequencies come from a 160 mm cone on the Triangle BR09 and a 150 mm cone on the Castle Avon 5.
| A | B | |
|---|---|---|
| Manufacturer | Triangle | Castle |
| Model | Triangle BR09 | Castle Avon 5 |
| Height | 1095 mm | 1110 mm |
| Width | 254 mm | 210 mm |
| Depth | 314 mm | 365 mm |
| Weight | 23.4 kg | 24 kg |
| Enclosure | bass-reflex-front | transmission-line |
| Drivers | 1× 25 mm tweeter (silk-dome), 1× 160 mm midrange (natural cellulose-pulp cone), 3× 160 mm woofer (fiberglass cone) | 2× 150 mm woofer, 1× 115 mm midrange, 1× tweeter (ribbon) |
| Frequency — low | 35 Hz | 35 Hz |
| Frequency — high | 22000 Hz | 20000 Hz |
| Sensitivity | 92 dB | 89 dB |
| Impedance | 8 Ω | 8 Ω |
| Recommended amp | 60–300 W | 25–100 W |
| MAP (USD) | $1,449 / pair | — |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | trianglehifi.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.

