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

