https://pureaudioproject.com/classic15-open-baffle-speakers-by-pureaudioproject/
Scroll all the way down to the end of the page and you'll find:
MORE TECHNICAL DATA
- True Point Source D’appolito Design
- Sensitivity > 96db (in a typical room).
- Nominal Impedance: 8ohm.
- Frequency Range: 29-32hz to 20Khz (in a typical room).
- Drivers: see above: About Trio15 Components.
- Crossovers: see above: About Trio15 Components.
- Typical distance from rear wall: 2-4′ (60-120cm)
- Distance from side walls: Any
- Size: W:54cm H:125cm D:27cm | W:21.25″ H:49.4″ D:10.63″
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Weight: starts at 55lb/25kg