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The Ypsilon Electronics PST-100 MKII (SE) Silver Edition is a high-end vacuum-tube stereo line preamplifier combining transformer-based volume control with switchable passive and active operation. Its active section is a zero-feedback, single-ended Class-A stage using two Siemens C3m pentodes wired as triodes and transformer-coupled to the output; a 6CA4/EZ81 valve rectifier and choke-filtered supply are used. The Silver Edition (SE) upgrades the signal path with custom silver wiring and Ypsilon-made transformers wound with custom enamel-coated silver wire, including the coupling transformers. The volume system uses a 31-tap transformer attenuator, placed after the valve gain stage, rather than a conventional resistive potentiometer. Inputs and XLR connections on this version are unbalanced despite the XLR connector format. The manufacturer currently maintains a PST-100 MK2 product page, although the exact SE Silver Edition configuration may have been superseded in the range by the later PST-100 MK2 SE Anniversary version.
Amplification power output and characteristics
Analog signal output specifications
Input and output connections
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The SL1 Legend Black Path Extreme's output impedance is 100Ω against the PST-100 MKII (SE) SILVER EDITION's 150Ω and its weight 36.29 kg (80 lbs) against 24.95 kg (55 lbs). Both share input impedance (50000Ω) and class (Tube).
The GE-10i's output impedance is 20000Ω against the PST-100 MKII (SE) SILVER EDITION's 150Ω, its input impedance 47000Ω against 50000Ω, and its weight 15 kg (33 lbs) against 24.95 kg (55 lbs). Both share class (Tube).
The TL-7.5 III's output impedance is 25Ω against the PST-100 MKII (SE) SILVER EDITION's 150Ω and its width 445 mm against 400.05 mm. Both share input impedance (50000Ω) and class (Tube).
The L1's output impedance is 30Ω against the PST-100 MKII (SE) SILVER EDITION's 150Ω, its input impedance 94Ω against 50000Ω, its weight 20 kg (44 lbs) against 24.95 kg (55 lbs), and its height 133 mm against 180.34 mm.
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