The 47 Labs phono cube is very interesting, as current-drive phono stages go, but sadly it is out of production for at least a year or more. What makes it interesting is that, although many manufacturers claim that their current mode phono stage has "zero" input impedance, in fact none of them achieve that goal. (To their credit, the Lino people do not make that claim.) In fact, it would be impossible to achieve it, since zero impedance is tantamount to a short circuit to ground, a mute switch. There has to be at least some very low impedance at the input. With that said, the 47 Labs cube comes closest to a true zero input impedance of any that I investigated a few years ago. The closer you can get to zero (without actually getting there), the more it can be said that the unit is current-driven or to put it another way, the more efficiently will the current output of the cartridge be converted to a voltage at the output of the phono stage. If it were me, and if price was not an issue, I would take a shot and go for the Lino, assuming you own a second phono stage to accommodate any cartridges that do not qualify for current drive. (I guess that is also assuming you use more than one cartridge, like most of the rest of us crazies.)
