Reference3A DeCapoI. No crossover electronics that waste power. Just a high pass cap for the tweeter, The Midwoofer is allowed to roll off naturally.
Relatively large cabinet for a stand speaker. And the midwoofer also is relatively large. Both characteristics combined yield excellent bass.
I drive my DeCapos with either a 25wpc OTL tube amp or a 35wpc Musical Fidelity Class A.
Sound magnificent, most musical I have ever heard except for ProAcs. But the ProAcs need a lot of power and the DeCapos do not.