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Envy

The 300B filaments are heated with DC from a circuit separate from the audio supply path, and the anode supply is built on MOSFET transistors and low-noise current sources.

Type
Valve headphone amplifier
Output
5 W into 16 ohms
Weight
15.1 kg
List
$8,899

Output into any load

The line is what the Envy delivers, estimated from its published ratings. Each square is a headphone in the catalog at the power it needs for a loud 110 dB peak.

Grado Signature HP100 SE: needs 0.20 mW at 38 ohmsFocal Stellia: needs 2.51 mW at 35 ohmsAudeze MM-520: needs 6.31 mW at 18 ohmsFocal Clear MG: needs 3.98 mW at 55 ohmsFostex TH900mk2: needs 10.0 mW at 25 ohmsMeze Audio Elite: needs 7.94 mW at 32 ohmsFocal Utopia (2022): needs 3.98 mW at 80 ohmsRosson Audio Design RAD-0: needs 15.8 mW at 29 ohmsYamaha YH-5000SE: needs 15.8 mW at 34 ohmsSony MDR-Z1R: needs 10.0 mW at 64 ohmsHIFIMAN HE1000se: needs 25.1 mW at 35 ohmsFinal D8000 Pro Edition: needs 15.8 mW at 60 ohmsZMF Caldera: needs 31.6 mW at 60 ohmsDan Clark Audio Stealth: needs 100 mW at 23 ohmsDan Clark Audio Expanse: needs 100 mW at 26 ohmsMeze Audio Empyrean II: needs 100 mW at 32 ohmsAudeze LCD-5s: needs 100 mW at 35 ohmsMeze Audio ARTA: needs 15.8 mW at 225 ohmsZMF Vérité Closed: needs 12.6 mW at 300 ohmsAudio-Technica ATH-ADX5000: needs 10.0 mW at 420 ohmsSennheiser HD 820: needs 16.6 mW at 300 ohmsSennheiser HD 800 S: needs 20.9 mW at 300 ohmsAbyss Diana TC Signature: needs 100 mW at 72 ohmsAbyss AB-1266 Phi TC: needs 158 mW at 50 ohmsHIFIMAN Susvara: needs 501 mW at 60 ohmsPublished: 5 W into 16 ohms
Output into each loadPublished ratingHeadphone it drives at 110 dB (25)Needs more (0)Load in ohms across, power up, both on log scales

Build a setup with it

Start with the Abyss AB-1266 Phi TC, the hardest headphone here it drives with power in reserve.

Open in the setup builder →

Where to buy

$8,899

Price: Standard Edition (Electro-Harmonix Gold 300B), Headphones.com list; Performance Edition (Full Music 300B, UPOCC wiring) is $9,799 at Audio46 (special order).

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Title block

Maker
Feliks Audio
Model
Envy
Type
Valve headphone amplifier
Made in
Poland
Output impedance
Not published
Weight
15.1 kg
List price
$8,899 USD
Output power
5 W into 16 ohms
Topology
Single-ended Class A, transformer-coupled; directly heated 300B power tubes, CV-181 (6SN7) driver tubes; zero global feedback, fully automatic bias, point-to-point wiring
Finish
Solid metal chassis with oiled natural wood (oak or American walnut)

What it drives

How the matching works

Plenty in reserve

10 dB or more above loud 110 dB peaks.

24

Enough

Reaches loud 110 dB peaks with up to 10 dB to spare.

1

Other valve amplifiers

Sources