ENVY Susvara Edition Headphone Amplifier By Feliks Audio

Feliks Audio Envy Susvara Edition Headphone Amplifier

The Feliks Audio Envy Susvara Edition represents the most advanced evolution of the acclaimed Envy amplifier lineup, purpose-built for demanding flagship headphones and uncompromising audiophile performance.

First introduced with the original Envy platform in 2021 and showcased at High End Munich 2022, the Envy series quickly gained recognition for its exceptional synergy with the HiFiMAN Susvara — one of the most power-demanding headphones available. Its rich tube tonality, expansive staging, and effortless control established the Envy as a standout amplifier in the summit-fi category.

Building on that legacy, the Envy Susvara Edition introduces substantial performance upgrades inspired by the celebrated Envy 25th Anniversary Edition. Enhanced circuitry, premium internal components, and refined tuning elevate this amplifier to an even higher level of technical and musical performance.

One of the most significant upgrades is the increased power delivery. The Envy Susvara Edition features three gain modes — Low, High, and dedicated Susvara mode — providing up to 9 Watts of pure Class A output power, approximately 12% higher than the Envy Performance Edition. This added headroom enables exceptional control, dynamics, and effortless drive for virtually any headphone on the market.

At the heart of the amplifier are custom amorphous-core output transformers, engineered for ultra-low noise, improved dynamics, and exceptionally extended frequency response. This advanced transformer design contributes to a more transparent, spacious, and refined presentation, delivering greater realism and precision across the entire frequency range.

The amplifier comes equipped with premium Stradi S300B tubes, carefully matched for outstanding balance, detail retrieval, and airy musicality. Compatible with standard 5V 300B tubes, the Envy Susvara Edition also offers tube-rolling flexibility for listeners who wish to tailor the sound signature to their personal preferences.

Signal integrity has been further refined through upgraded capacitors, resistors, and internal wiring using premium components from respected manufacturers including Jantzen, Vishay, Nichicon, and Dale. Additional engineering enhancements improve noise handling, signal stability, and long-term reliability.

Visually, the Envy Susvara Edition combines luxury craftsmanship with timeless design. Finished in elegant solid Wenge wood as standard, the amplifier reflects the premium aesthetic for which the Envy series is known, with additional wood finishes available by request.

Handcrafted in Poland, the Envy Susvara Edition is the culmination of years of development, technical refinement, and community feedback — delivering a reference-level headphone amplifier experience designed to unlock the full potential of today’s finest headphones.

Soundnews
“I’m happy to inform you that the Envy Susvara Edition will, from this moment on, be my new benchmark tube amplifier, the one others will try to outperform in the coming years. I already purchased a stash of tubes that should last me for the next ~10 years or so, and my body and spirit are ready for what’s coming next. I’ll probably stick with it for a while, and I pray to Odin that something out there will eventually top its performance or at least challenge it somewhere in the future. Arriving at the end of the road is not always a fun place to be, as it’s both rewarding and a little sad. It’s like losing your life’s purpose and your driving force. But for the moment, I’m simply happy to have such a marvelous-sounding amplifier that can double as a high-end preamplifier. Its hefty price tag will shoo away many headphiles, and that’s probably fine. It’s not for everybody, only for those who won’t accept anything less than the best.”

https://soundnews.net/reviews/amplifiers/feliks-envy-susvara-edition-review-when-almost-enough-is-no-longer-enough/
Headfonia
“The Feliks Audio Envy Susvara Edition is a serious step up from the regular Envy, and it really excels when using it what it was meant for: elevating the Hifiman Susvara to another level. The Envy SE is perfectly built, and it performs superbly, not only with the Hifiman Susvara. If you want to have the ultimate Susvara amp, the Envy SE is a very good option, but it doesn’t come cheap.”

https://www.headfonia.com/feliks-audio-envy-susvara-edition-review/2/

• Power tubes: Stradi S300B
• Driver tubes: PsVane CV-181 mk2 (6SN7)
• 2x unbalanced RCA inputs (IN1, IN2)
• 1x balanced XLR input (IN3)
• Input sensitivity 1 V RMS
• Input impedance:
  • For IN1 i IN2 (RCA) 100 kΩ
  • For IN3 (XLR) 10 kΩ
• 1x pair of pre-amplifier outputs as RCA
• 1x pair of pre-amplifier output as XLR
• Maximum voltage on the above outputs is 5 V (RMS) at an output impedance of 600 Ω and THD<0,5%
• Maximum output power – 9 W
• Amplifier’s impedance:
  • LO at 32 ohm load is 3,8 ohm
  • HI at 600 ohm load is 20 ohm
  • SUSVARA at 600 ohm load is 22 ohm
• Frequency response:
  • – 7 Hz÷100 kHz ±3 dB
  • – 15 Hz÷43 kHz ±1 dB
• Headphone outputs: 6.3mm and 4-pin XLR
• AC voltage 50 / 60 Hz:
  • – 230 V version (±5%)
  • – 115 V version (±5%)
• Power consumption: 110 VA

BOX CONTENT

• Envy Susvara Edition Headphone Amplifier
• 2x Stradi S300B tubes
• 2x PsVane CV-181 Mk. 2 tubes
• AC Power Cord
• User Manual
• Warranty Card

Download ENVY Susvara User Manuals