Feliks Audio Envy Headphone Amplifier (OPEN)

Feliks Audio Envy Headphone Amplifier “The Feliks Audio Envy is a future classic already ... you will never need a different tube headphone amp.” — LIEVEN, HEADFONIA 'RECOMMENDED BUY' AND 'BEST GEAR' Class A single-ended transformer-coupled, balanced amplifier, powered by 300B tubes. Hand-crafted in Poland New in 2022, the Feliks Audio Envy is a single-ended class-A headphone amp with a transformer-coupled output, designed to handle planar magnetic or dynamic headphone with an impedance between 16 and 600 Ohm.  The Envy will drive even the most demanding of these headphones with up to 8 watts of power. Its heart-stopping design is offered with extensive customization options, and there are multiple inputs and outputs (including balanced XLR) for great flexibility in use. Headphone impedance selection is from 60 to 600 Ohm. The Standard Edition includes Electro-Harmonix Gold 300B power tubes and premium copper wiring. The Performance Edition includes Full Music 300B power tubes and UPOCC (single crystal copper) wiring. Hand-Crafted in Poland Feliks Audio is a boutique manufacturer of hand-crafted tube amplifiers, with over 20 years of audio solutions development experience. All products are in-house engineered, tuned, and assembled in Lubliniec, Poland. The Envy was designed from scratch to be a flagship, destination tube amp, and Feliks has created a masterpiece. It is built on a solid metal chass and finished with beautifully oiled solid wood. High-Quality Parts The volume control uses an Alps Rk27 potentiometer, and two two-stage preamplifier uses CV-181 tubes and Jantzen Superior Z-Cap coupling capacitors. Power tubes are the directly heated 300B tubes, and the output transformers are custom-made high-end audio units made by EDIS Ogonowski. The mains transformer is also an audio-grade unit by EDIS. Biasing is fully automatic bias, and the electrical circuits are a zero-feedback design. The power tubes are heated with DC via a special circuit that's separate from the audio path. The power supply for anode voltages is based on MOSFET transistors and low-noise current sources. The XLR balanced inputs use symmetrical high-end audio grade Lundahl transformers. Audio source selection is made using high-end relays, which are placed directly behind the input connectors, in order to limit interference and noise. The amplifier is made using "point to point" technology. All wired connections are custom-made from single crystal copper (UPOCC) with a Teflon dielectric. Specifications Output Power: 8 W Tube Complement: 2 x 300B, 2 x PsVane CV-181 mk2 (6SN7) Inputs: 2 x RCA, 2 x XLR Input Impedance (RCA, XLR): 100 kΩ, 10kΩ Outputs: 1x RCA pre, 1 x XLR pre, 6.3mm, XLR headphone Dimensions: 13.7" x 13" x 7.3"  (35 × 33 × 18.5 cm) Weight: 33.3 lb