Front view — side by side at true scale
ACastle Avon 2BTriangle Solstice 3
| A | B | |
|---|---|---|
| Manufacturer | Castle | Triangle |
| Model | Castle Avon 2 | Triangle Solstice 3 |
| Height | 475 mm | 418 mm |
| Width | 210 mm | 221 mm |
| Depth | 310 mm | 370 mm |
| Weight | 10.5 kg | 12.9 kg |
| Enclosure | transmission-line | bass-reflex-front |
| Drivers | 1× 150 mm woofer, 1× 115 mm midrange, 1× tweeter (ribbon) | 1× 25 mm tweeter (magnesium-alloy dome (horn-loaded)), 1× 160 mm mid-bass (natural cellulose-pulp cone) |
| Frequency — low | 50 Hz | 48 Hz |
| Frequency — high | 20000 Hz | 22000 Hz |
| Sensitivity | 88 dB | 90 dB |
| Impedance | 8 Ω | 8 Ω |
| Recommended amp | 25–100 W | 25–130 W |
| MAP (USD) | $1,030 / pair | $1,162 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | castle.uk.com ↗ | trianglehifi.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.

