Analog sources: Benny Audio Odyssey turntable, Benz Micro Gullwing cartridge.
Digital sources: Tascam CD-200iL CD player, HoloAudio May DAC.
Preamplifiers: Shindo Labs Allegro (line), Manley Chinook (phono).
Power amplifiers: Air Tight ATM-1 SE, Elekit TU-8888 monoblocks, Rogue Audio Stereo 100.
Loudspeakers: Volti Audio Lucera.
Cables: Interconnects: Auditorium 23, Triode Wire Labs Spirit II (RCA), "Spirit 75" S/PDIF (RCA/BNC). Speaker: AudioQuest William Tell Zero (10') Auditorium 23 (8').
Accessories: Pro-Ject VC-S2 ALU,…
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Sidebar 2: Associated Equipment
Sidebar 3: Measurements
I used the Audio Precision APx555 analyzer to measure the Ampsandsound Yellowstone. To minimize noise, I connected the grounding terminal on the preamplifier's rear panel to the analyzer's ground. Over four hours of testing, the Yellowstone stabilized at 89°F, measured on the top panel. Many of the measurements below were made several times at different operating temperatures with no meaningful change in performance.
The Yellowstone has three line inputs—two single-ended and one balanced—alongside dedicated single-ended inputs for moving magnet and moving…