TrueScaleAudio
Compare speakers at true scale
Pick two speakers and see them side by side at their real-world size.
Front view — overlaid at true scale
Click either cabinet to swap A ↔ B · Reference height: 346 mm (34.6 cm) · 1 mm = 1.62 px
ELAC UniFi UB52vsCastle Richmond IV
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 133 mm cone on the ELAC UniFi UB52 and a 150 mm cone on the Castle Richmond IV. Both land in a similar price bracket, around $780 a pair.
| A | B | |
|---|---|---|
| Manufacturer | ELAC | Castle |
| Model | ELAC UniFi UB52 2.0 | Castle Richmond IV |
| Height | 346 mm | 305 mm |
| Width | 185 mm | 190 mm |
| Depth | 275 mm | 262 mm |
| Weight | 8.5 kg | 6.3 kg |
| Enclosure | bass-reflex-front | bass-reflex-rear |
| Drivers | 1× 25 mm tweeter (soft dome), 1× 102 mm midrange (aluminium cone), 1× 133 mm woofer (aluminium cone) | 1× 150 mm mid-bass, 1× 32 mm tweeter (soft dome) |
| Frequency — low | 46 Hz | 58 Hz |
| Frequency — high | 35000 Hz | 22000 Hz |
| Sensitivity | 85 dB | 87 dB |
| Impedance | 6 Ω | 8 Ω |
| Recommended amp | — | 25–100 W |
| MAP (USD) | $799 / pair | $760 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | elac.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.