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I own Bliss Hifi, a high-end audio boutique based in Minnesota. This Feliks Audio Envy 25th Anniversary Edition headphone amplifier is in on consignment from one of my local clients. It was purchased new from headphones.com, the exclusive North American retailer for this edition. The unit is in like-new condition and in perfect working order. Single owner. This is one of only 25 individually numbered units produced worldwide to celebrate Feliks Audio’s 25th anniversary.

The unit comes with its original packaging and all accessories, including the Feliks branded Elrog ER300B power tubes and PSVANE CV181 driver tubes, and a booklet documenting the amplifier’s construction, signed by the Feliks family.

The standard Envy is already widely regarded as one of the finest headphone amplifiers ever built. Headfonia called it a future classic and said you would never need a different tube headphone amplifier. The 25th Anniversary Edition takes the Envy platform and elevates every critical element. The stock 300B power tubes are replaced with Feliks branded Elrog ER300B tubes, handmade in Germany, paired with strictly selected low-noise PSVANE CV181 driver tubes. The output transformers are custom-manufactured with amorphous cores, which extend the frequency response and deliver a level of detail resolution and background silence that the standard Envy’s conventional transformers cannot match. The power transformer is upgraded to a custom toroidal design for silent operation and improved resistance to interference. Capacitors, signal wiring, and interference shielding are all upgraded, and the preamplifier module has been retuned. The chassis is finished in black piano lacquer, handcrafted in cooperation with a world-class piano refurbishment specialist in Poland, and it is genuinely stunning in person. In listening, the 25th Anniversary Edition drives everything from the Hifiman Susvara to the Focal Utopia with effortless authority, delivering the warmth, dimensionality, and holographic imaging that the best 300B amplifiers are known for, combined with a transient speed and dynamic grip that you do not expect from a single-ended tube design. The preamplifier output also allows it to drive a speaker system with that same rich, holographic character. Finding one of these on the used market may not happen again.

Happy to answer any questions. Thanks for your consideration.

Check my stellar feedback and buy with confidence. This listing includes free insured shipping across the CONUS. As this is a passthrough sale that I am brokering on behalf of my client, I prefer to accept payments via PayPal F&F, Venmo Gift, or personal check, but this also gives you the opportunity to attain this at my lowest possible price. Credit card payments are also possible for a 3.1% convenience charge.

More about the unit:

The Feliks Audio Envy 25th Anniversary Edition is a limited-edition single-ended Class A headphone tube amplifier with transformer-coupled output, designed and handcrafted in Lubliniec, Poland by Feliks Audio, a family-run boutique manufacturer with 25 years of experience in tube amplifier design. Only 25 individually numbered units were produced worldwide, available exclusively through selected Feliks dealers (headphones.com is the exclusive North American retailer). The 25th Anniversary Edition is built around Feliks branded Elrog ER300B power tubes, handmade in Germany by Elrog, paired with strictly selected low-noise premium PSVANE CV181 driver tubes. Custom-manufactured amorphous core output transformers extend the frequency response and provide enhanced detail resolution and an extremely black background compared to the standard Envy’s conventional transformers. A custom toroidal power transformer ensures silent operation, stability, and resistance to interference. Upgraded capacitors and signal wiring with improved interference protection, and a retuned preamplifier module complete the internal upgrades. The chassis features a unique black piano finish, fully handcrafted in cooperation with a world-class piano refurbishment specialist in Poland. The amplifier is designed to drive any dynamic or planar magnetic headphones with impedance between 16 and 600 ohms, delivering up to 8 watts of power. Front-panel controls include a touch-sensitive standby button, volume control knob, impedance selector (switchable for optimal matching), and audio source selector. Headphone outputs include balanced 4-pin XLR and unbalanced 6.3mm. Audio inputs include balanced XLR and single-ended RCA. A preamplifier output allows the Envy to drive a power amplifier and speaker system. Each unit ships with a booklet documenting the amplifier’s step-by-step construction process, signed by the Feliks family.

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