TrueScaleAudio
Compare speakers at true scale
Pick two speakers and see them side by side at their real-world size.
Front view — side by side at true scale
Click either cabinet to swap A ↔ B · Reference height: 13.6 in · 1 in = 41.11 px
Castle Richmond IVvsELAC UniFi UB52
The ELAC UniFi UB52 stands 34.6 cm tall — about 4.1 cm more than the Castle Richmond IV at 30.5 cm. At 87 dB against 85 dB, the Castle Richmond IV is the easier load to drive and plays louder from the same amplifier. The ELAC UniFi UB52 reaches deeper in the bass, down to 46 Hz versus 58 Hz. Low frequencies come from a 150 mm cone on the Castle Richmond IV and a 133 mm cone on the ELAC UniFi UB52. Both land in a similar price bracket, around $780 a pair.
| A | B | |
|---|---|---|
| Manufacturer | Castle | ELAC |
| Model | Castle Richmond IV | ELAC UniFi UB52 2.0 |
| Height | 12 in | 13.6 in |
| Width | 7.5 in | 7.3 in |
| Depth | 10.3 in | 10.8 in |
| Weight | 13.9 lb | 18.7 lb |
| Enclosure | bass-reflex-rear | bass-reflex-front |
| Drivers | 1× 5.9 in mid-bass, 1× 1.3 in tweeter (soft dome) | 1× 1 in tweeter (soft dome), 1× 4 in midrange (aluminium cone), 1× 5.2 in woofer (aluminium cone) |
| Frequency — low | 58 Hz | 46 Hz |
| Frequency — high | 22000 Hz | 35000 Hz |
| Sensitivity | 87 dB | 85 dB |
| Impedance | 8 Ω | 6 Ω |
| Recommended amp | 25–100 W | — |
| MAP (USD) | $760 / pair | $799 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | castle.uk.com ↗ | elac.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.