TrueScale
Compare speakers at true scale.
TrueSpecs
Compare technical specifications (up to 4 speakers).
HiFi Ladder
Browse every speaker ordered by size, side by side.
References
Front view — side by side at true scale
ATriangle Duetto 40thBELAC Concentro S 503.2
| A | B | |
|---|---|---|
| Manufacturer | Triangle | ELAC |
| Model | Triangle Duetto 40th | ELAC Concentro S 503.2 2.0 |
| Height | 18.1 in | 15.7 in |
| Width | 9.5 in | 8.6 in |
| Depth | 13.8 in | 14.6 in |
| Weight | 37 lb | 29.5 lb |
| Enclosure | bass-reflex-front | bass-reflex-rear |
| Drivers | 1× 1 in tweeter (magnesium-dome compression diaphragm), 1× 6.5 in mid-bass (natural cellulose-pulp paper cone) | 1× tweeter (JET 6 pleated-folded ribbon), 1× 5.1 in midrange (aluminium AS-XR cone), 1× 7.1 in woofer (aluminium AS-XR cone) |
| Frequency — low | 40 Hz | 40 Hz |
| Frequency — high | 30000 Hz | 40000 Hz |
| Sensitivity | 88 dB | 87 dB |
| Impedance | 8 Ω | 4 Ω |
| Recommended amp | 30–200 W | 60–500 W |
| MAP (USD) | $6,500 / pair | $7,398 / pair |
| Brand website | trianglehifi.com ↗ | elac.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.

