TrueSpecs
Compare technical specifications (up to 4 speakers).
HiFi Ladder
Browse every speaker side by side, ordered by size or by price.
HiFi Search
Find speakers by the specs you want.
TrueScaleAudio
Compare speakers at true scale
Pick two speakers and see them side by side at their real-world size.
References
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.