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Ypsilon Electronics Phaethon
Phaethon is a hybrid line level amplifier utilizing only three active gain stages two of them with low noise valves operating in single-ended class A fashion, for the input and driver stage. It uses a transformer attenuator build in-house, embedded in the preamplifier section in a novel post attenuation technique.
The tube driver stage is coupled to the output stage with a wide bandwidth inter-stage transformer that provides perfect phase splitting for the output stage.
The output stage combined by same polarity semiconductors for both phases in a “balanced single-ended architecture” offers the flavor of pure single-ended designs with the power of push-pull designs.
There are separate power supplies for the tube and output stage utilizing five power supply inductors for low noise filtering.
All these were designed in to one to operate in unison offering unmatched sound quality, making the platform of the integrated amplifier, a clear advantage.
All functions are remote controlled and are visible through a high quality LCD display with large characters so it can be read from across the room.
- transparent sounding transformer attenuator
- only three gain stages one of them the active preamp stage with tubes
- unique “bridgedsingle-ended” output stage biased in class A for the ‘first most important watts’
- full function remote control
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Ypsilon Phaethon — transformer‑heart, single‑ended spirit
The Phaethon marries SET‑inspired timbral richness with modern power delivery, delivering laser‑like precision and a surprisingly relaxed naturalness. Sebastian Polcyn for Fidelity Magazine praises its internal resolution, nuanced dynamics and authentic vocal presence. Built around transformer‑coupled stages and a transformer‑based volume attenuator, the Phaethon pairs 110 W/8 Ω (180 W/4 Ω) muscle with an exceptionally quiet background and precise imaging. Its hybrid topology preserves single‑ended virtues without typical SET compromises, and bespoke transformer windings underline top‑tier build quality. Ideal for listeners who want musical detail, tactile dynamics and engineering refinement rather than a feature‑heavy hub, the Phaethon rewards careful system matching and prioritizes sonic realism over gadgetry.
Pros
- Natural, detailed midrange and vocal realism with high internal resolution and rich timbral color.
- Impressive dynamics and transient nuance driven from a substantial 110 W/8 Ω (180 W/4 Ω) output—rhythmic precision without hardness.
- Elaborate transformer‑based engineering (inter‑stage transformers and transformer attenuator) and bespoke winding materials deliver low noise and exceptional build quality.
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Cons
- Rear panel and remote engraving are hard to read in low light, which hampers everyday usability.
- Unit defaults to muted on power‑up, which can confuse users until the mute is disengaged.
Sound Quality
90/100
Dynamics
91/100
With 110W/8ohm (180W/4ohm) and reviewer comments highlighting nuanced dynamic intensity and exceptional transient nuance ('seldom heard such nuances'), the Phaethon performs at an excellent dynamics level for a Class AB-style high-power integrated amp. The score reflects both the strong praise and the power/topology expectations.
Soundstage Imaging
89/100
Reviewer notes that staging is realistic and images are precisely positioned with good solidity and natural development, though not extremely broad or deep. This yields very good imaging and believable soundstage, slightly short of being described as holographic or reference-wide.
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Build Quality
92/100
Construction choices are highlighted (transformer coupling between stages, large transformer attenuator, custom annealed winding material for the SE unit) and described as elaborate and expensive, supporting a top-tier build score. The single-review source tempers an upward move into the 95+ reference band.
Features Connectivity
83/100
Spec'd inputs include 3x RCA plus 1x XLR and the unit includes a remote (engraved but hard-to-read). No phono stage, DAC, streaming, headphone outputs, or HT bypass are mentioned, so the Phaethon sits above the minimal baseline thanks to XLR and remote but lacks broader modern connectivity.
Value for Money
86/100
The review lavishly praises the Phaethon's technical and musical achievements but does not discuss price or compare relative cost versus peers; per rules, absent price/value commentary defaults to the neutral baseline. Score reflects strong performance praise but no price context.
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