Front view — side by side at true scale
AQuad S-4BTriangle BR09
Click either cabinet to swap A ↔ B · Reference height: 1095 mm (109.5 cm) · 1 mm = 0.51 px
| A | B | |
|---|---|---|
| Manufacturer | Quad | Triangle |
| Model | Quad S-4 | Triangle BR09 |
| Height | 870 mm | 1095 mm |
| Width | 180 mm | 254 mm |
| Depth | 300 mm | 314 mm |
| Weight | 20.5 kg | 23.4 kg |
| Enclosure | passive-radiator | bass-reflex-front |
| Drivers | 1× tweeter (ribbon), 1× 100 mm midrange (woven Kevlar cone), 2× 125 mm woofer (woven Kevlar cone) | 1× 25 mm tweeter (silk-dome), 1× 160 mm midrange (natural cellulose-pulp cone), 3× 160 mm woofer (fiberglass cone) |
| Frequency — low | 44 Hz | 35 Hz |
| Frequency — high | 23000 Hz | 22000 Hz |
| Sensitivity | 88 dB | 92 dB |
| Impedance | 6 Ω | 8 Ω |
| Recommended amp | 40–200 W | 60–300 W |
| MAP (USD) | $1,499 / pair | $1,449 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | quad-hifi.co.uk ↗ | trianglehifi.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.