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YPSILON SET 100 ULTIMATE
Single-Ended Class A Hybrid Amplifier. 120 W @ 8 Ω with Zero Global Feedback
Input Stage featuring a SIEMENS EC8010 vacuum tube, powered by an independent power supply with tube rectification
Output Stage using transformer-coupled MOSFETs with amorphous c-core transformers
Only Two Gain Stages for maximum transparency and naturally musical presentation
Handcrafted Construction with hand-extruded silver wiring throughout
Gain: 29.5 dB
Bandwidth: 5 Hz – 80 kHz
Output Impedance: 0.22 Ω
Dimensions (H × W × D): 240 × 610 × 672 mm
Weight: 100 kg
Power Consumption: 400 W constant
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SET 100 Ultimate. Reference-Class Single-Ended Class A Hybrid Amplifier
The SET 100 Ultimate is a reference-level, single-ended Class A hybrid amplifier delivering 120 W per channel. It combines the tonal magic and intimacy of a low-power S.E.T. amplifier with scale, authority, and unprecedented levels of macro and micro-detail—setting a new standard for what’s possible in this design philosophy.
Single-Ended Output with Amorphous Core Magic
The output stage employs a single-ended MOSFET configuration, directly coupled to the output through a continuous current path formed by a custom-designed dual c-core inductor made of amorphous material. This unique approach delivers powerful, transparent, and effortlessly musical amplification that honors the emotional essence of every performance.
Minimalist Design, Maximum Transparency
With only two gain stages in the entire signal path, the SET 100 Ultimate achieves immediacy and clarity that far surpasses more complex amplifier designs. The absence of global feedback ensures low distortion while maintaining a low enough output impedance to confidently drive real-world loudspeakers with authority and finesse.
Input Stage: SIEMENS EC8010 with Independent Power Supply
At the front end is the high-transconductance SIEMENS EC8010 triode, chosen for its unmatched musicality and reliability. This stage is powered by an independent power supply with tube rectification and choke regulation, ensuring a stable and clean energy flow.
The signal is coupled to the output stage via a reference-grade interstage transformer, built using a proprietary dual c-core design and optimized winding techniques. Sonically, this transformer acts as a virtually invisible component—imparting no coloration or dynamic limitations.
Handcrafted Construction with Pure Silver Wiring
All internal wiring and the output stage are hand-built using extruded silver wire made to custom specifications. This ensures a lossless, interference-free signal transmission. The SET 100 Ultimate doesn’t just reproduce music—it brings it to life with a natural presence and scale that is immersive and deeply moving.
Compared to conventional designs, it offers a more direct, three-dimensional, and musically engaging sound, with palpable instrumental body, deep low-frequency extension, and breathtaking dynamics that fully immerse the listener.
Precision Power Supply Design
The power supply is treated as an integral part of the sonic chain. It includes a low-noise EI transformer, a large inductor, and four-pole electrolytic capacitors—all wired in silver to maintain purity throughout.
Mechanical, magnetic, and electrical noise are kept to an absolute minimum, resulting in ultra-quiet operation. The result is a dark, silent background from which sound emerges with remarkable realism and a captivating sense of presence.
Technical Specifications
Output Power Before Clipping:
120 W RMS @ 8 Ω
130 W RMS @ 5.6 Ω
100 W RMS @ 4 Ω
Bandwidth: 5 Hz – 80 kHz (–3 dB)
Output Impedance: 0.22 Ω
Input Impedance: 47 kΩ
Gain: x30 (29.5 dB)
Power Consumption: 400 W (constant)
Dimensions (W × H × D): 240 × 610 × 672 mm
Weight: 100 kg
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