i saw a familiar face when I went into the Veloce room, as Mark Conti, who designed the unusual Impact speakers from a few years back, is now involved in this line of battery-powered amplification. My eyes were attracted by the Veloce Platino LFT-1 linestage in the photo ($12,500), which will run for 70 hours before needing recharging, but driving the Marten speakers in the room via Purist cables was a pair of battery-power monoblocks ($12,000/pair). Battery power? Yes, the input stage, based on a 6922 tube, is transformer-coupled to a high-efficiency class-D output stage based on the Hypex module designed by famed Dutch engineer Bruno Putzys. A charge will last 4080 hours depending on the speaker's load impedance, Mark told me.