The speakers are the Devore Fidelity Super 8. They are rated a very easy to drive 90 dB with stable impedance that does not drop below 7 ohms. Many users drive them with tube amps. A dealer friend happened to bring in some Audio Note amps (not the OTO SE though) and I decided to try out the OTO PP. It is very good and from what I read there is particular synergy between the Super 8 and Leben amps. The OTO with the Super 8 goes very loud, sounds very musical, organic, pure and delicate, although the bass could be more defined and punchy. The soundstage is very wide and high but compared to my Lavardin amp it is not very deep and the spaces in between the images are not very apparent.