I have not heard the acapella, but I have heard the Uno, the Nano and the Mezzo. The Nano improves on the sound of the Uno. It is much more refined and sounds definitively better. The Mezzo, which is really a Duo with a horn loaded woofer is absolutely fantastic. The bass is very good and I doubt it can get much better, unless you go to the trio/basshorn combination and get the house to fit it in.
The Mezzo, which I would catalogue as one of the best speaker systems you can get today costs in Europe 31500 Euros, in the US probably over $45000. Not cheap, but since you only need 5 Watts to drive them, you save on amplifier hardware. SET works best.
The Mezzo, which I would catalogue as one of the best speaker systems you can get today costs in Europe 31500 Euros, in the US probably over $45000. Not cheap, but since you only need 5 Watts to drive them, you save on amplifier hardware. SET works best.