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Front view — side by side at true scale
ATechnics SB-G90M2BQ Acoustics Concept 50
| A | B | |
|---|---|---|
| Manufacturer | Technics | Q Acoustics |
| Model | Technics SB-G90M2 M2 | Q Acoustics Concept 50 |
| Height | 1111 mm | 1027 mm |
| Width | 289 mm | 396 mm |
| Depth | 365 mm | 321 mm |
| Weight | 35.4 kg | 22.9 kg |
| Enclosure | bass-reflex | bass-reflex-rear |
| Drivers | 1× 25 mm tweeter (aluminium dome), 1× 160 mm midrange (aluminium cone), 2× 160 mm woofer (aluminium cone) | 1× 25 mm tweeter (soft dome), 2× 125 mm mid-bass (coated paper cone) |
| Frequency — low | 33 Hz | 42 Hz |
| Frequency — high | 90000 Hz | 30000 Hz |
| Sensitivity | 86 dB | 90.5 dB |
| Impedance | 4 Ω | 6 Ω |
| Recommended amp | 40–200 W | 25–150 W |
| MAP (USD) | $3,999.99 each | $3,899 / pair |
| Where to buy | Check availability ↗ | Check availability ↗ |
| Brand website | us.technics.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.

