Front view — side by side at true scale
ASVS Prime TowerBCastle Avon 4
| A | B | |
|---|---|---|
| Manufacturer | SVS | Castle |
| Model | SVS Prime Tower | Castle Avon 4 |
| Height | 914 mm | 955 mm |
| Width | 203 mm | 180 mm |
| Depth | 274 mm | 310 mm |
| Weight | 18.2 kg | 17.6 kg |
| Enclosure | bass-reflex-rear | transmission-line |
| Drivers | 1× 25 mm tweeter (aluminium-dome), 1× 114 mm midrange (polypropylene cone), 2× 165 mm woofer (polypropylene cone) | 1× 130 mm woofer, 1× 115 mm midrange, 1× tweeter (ribbon) |
| Frequency — low | 30 Hz | 45 Hz |
| Frequency — high | 25000 Hz | 20000 Hz |
| Sensitivity | 87 dB | 89 dB |
| Impedance | 8 Ω | 8 Ω |
| Recommended amp | 20–250 W | 25–100 W |
| MAP (USD) | $599.99 each | — |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | svsound.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.

