In a surprise move perhaps for a maker famous for his vacuum tube components, Kazutoshi Yamada of Zanden Audio has just added the Model 300 Stereo Passive Line Volume Controller to his lineup.
With four RCA inputs and two outputs, the input impedance is 10Kohm, the attenuator a DacT CT2 10K-2 from Denmark, the rotary selector a Swiss DacT CT3-5-4, the front panel 5mm aluminum and the case 1.5mm stainless steel. RFI absorption materials line the innards. The US retail is $2,500.
Perhaps my favored new recipe of passive preamplification into valve amps is catching on?