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This article focuses on the Ampsandsound Yellowstone, a high-end, tubed stereo preamplifier designed by Justin Weber, who balances his audio design work with a career in social work and therapy. The Yellowstone, priced at $25,000, is a robust, industrially built unit featuring separate power supplies and transformers for its line and phono stages, turret-board construction for durability and serviceability, and a sophisticated 64-step relay volume control with a dedicated power supply. Its design draws heavily on vintage American tube preamplifiers, especially the Marantz 7C, aiming to deliver tonal purity, transparency, and dynamic speed with a subtle warmth. Measurements confirm its low noise, low distortion, and excellent channel separation, while listening tests highlight its neutrality, expansive soundstage, and strong phono stage performance, making it suitable for serious audiophiles seeking a durable, high-fidelity preamplifier. [Extracted from the article] |
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