Front view — side by side at true scale
AQuad S-5BQ Acoustics 5040
| A | B | |
|---|---|---|
| Manufacturer | Quad | Q Acoustics |
| Model | Quad S-5 | Q Acoustics 5040 |
| Height | 1070 mm | 967 mm |
| Width | 205 mm | 344 mm |
| Depth | 330 mm | 293 mm |
| Weight | 25.3 kg | 18 kg |
| Enclosure | passive-radiator | bass-reflex-rear |
| Drivers | 1× tweeter (ribbon), 1× 100 mm midrange (woven Kevlar cone), 2× 165 mm woofer (woven Kevlar cone) | 1× 25 mm tweeter (soft dome), 2× 125 mm mid-bass (C³ continuous curved cone) |
| Frequency — low | 42 Hz | 39 Hz |
| Frequency — high | 23000 Hz | 30000 Hz |
| Sensitivity | 90 dB | 91.5 dB |
| Impedance | 6 Ω | 6 Ω |
| Recommended amp | 40–200 W | 25–150 W |
| MAP (USD) | $1,999 / pair | $1,999 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | quad-hifi.co.uk ↗ | 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.

