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: 380 mm (38.0 cm) · 1 mm = 1.47 px
Castle Knight 2vsQ Acoustics 3030i
The Castle Knight 2 stands 38.0 cm tall — about 5.5 cm more than the Q Acoustics 3030i at 32.5 cm. At 90 dB against 88 dB, the Castle Knight 2 is the easier load to drive and plays louder from the same amplifier. The Castle Knight 2 reaches deeper in the bass, down to 42 Hz versus 46 Hz. Low frequencies come from a 150 mm cone on the Castle Knight 2 and a 165 mm cone on the Q Acoustics 3030i. Both land in a similar price bracket, around $505 a pair.
| A | B | |
|---|---|---|
| Manufacturer | Castle | Q Acoustics |
| Model | Castle Knight 2 | Q Acoustics 3030i |
| Height | 380 mm | 325 mm |
| Width | 200 mm | 200 mm |
| Depth | 335 mm | 329 mm |
| Weight | 7.85 kg | 6.4 kg |
| Enclosure | bass-reflex-rear | bass-reflex-rear |
| Drivers | 1× 150 mm mid-bass, 1× 25 mm tweeter (soft dome) | 1× 22 mm tweeter (soft dome), 1× 165 mm mid-bass (coated paper cone) |
| Frequency — low | 42 Hz | 46 Hz |
| Frequency — high | 24000 Hz | 30000 Hz |
| Sensitivity | 90 dB | 88 dB |
| Impedance | 8 Ω | 6 Ω |
| Recommended amp | 15–125 W | 25–75 W |
| MAP (USD) | $510 / pair | $499.96 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | castle.uk.com ↗ | qacoustics.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.