Quad S-4vsCastle Avon 4
| A | B | |
|---|---|---|
| Manufacturer | Quad | Castle |
| Model | Quad S-4 | Castle Avon 4 |
| Height | 870 mm | 955 mm |
| Width | 180 mm | 180 mm |
| Depth | 300 mm | 310 mm |
| Weight | 20.5 kg | 17.6 kg |
| Enclosure | passive-radiator | transmission-line |
| Drivers | 1ร tweeter (ribbon), 1ร 100 mm midrange (woven Kevlar cone), 2ร 125 mm woofer (woven Kevlar cone) | 1ร 130 mm woofer, 1ร 115 mm midrange, 1ร tweeter (ribbon) |
| Frequency โ low | 44 Hz | 45 Hz |
| Frequency โ high | 23000 Hz | 20000 Hz |
| Sensitivity | 88 dB | 89 dB |
| Impedance | 6 ฮฉ | 8 ฮฉ |
| Recommended amp | 40โ200 W | 25โ100 W |
| MAP (USD) | $1,499 / pair | โ |
| Where to buy | Check availability โ | Check availability โ |
| Brand website | quad-hifi.co.uk โ | castle.uk.com โ |
| Product page | Open product page โ | Open product page โ |
Larger value highlighted in green. For low-frequency extension, lower Hz = greater bass reach, so the deeper side is highlighted.