Polk Reserve R100vsCastle Richmond IV
| A | B | |
|---|---|---|
| Manufacturer | Polk | Castle |
| Model | Polk Reserve R100 | Castle Richmond IV |
| Height | 324 mm | 305 mm |
| Width | 167 mm | 190 mm |
| Depth | 260 mm | 262 mm |
| Weight | 5.5 kg | 6.3 kg |
| Enclosure | bass-reflex-rear | bass-reflex-rear |
| Drivers | 1ร 25 mm tweeter (Pinnacle ring radiator), 1ร 133 mm mid-bass (Turbine cone) | 1ร 150 mm mid-bass, 1ร 32 mm tweeter (soft dome) |
| Frequency โ low | 58 Hz | 58 Hz |
| Frequency โ high | 39000 Hz | 22000 Hz |
| Sensitivity | 86 dB | 87 dB |
| Impedance | 4 ฮฉ | 8 ฮฉ |
| Recommended amp | 30โ150 W | 25โ100 W |
| MAP (USD) | $699 / pair | $760 / pair |
| Where to buy | Check availability โ | Check availability โ |
| Brand website | polkaudio.com 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.