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HiFiMAN - EF100 Headphone Amp/Integrated Amp

Integrated Amp

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Item: AHFMEF100

HiFiMan EF100 Integrated/Headphone Amp 

Three Independent Amplifier Sections Anchor HiFiMan EF100 Headphone Amp: Hybrid Design Combines Warmth of Tubes and Efficiency of Solid-State Technology

Vacuum-Tube Input Stage, Class AB Headphone Amp, and a Speaker-Connected Power Amp Turn Gorgeous-Sounding HiFiMan EF100 into a Two-for-One Spectacular

Tube and solid-state performance come together in the HiFiMan EF100 headphone amplifier / integrated amplifier. Loaded with three independent amplifier sections—a vacuum-tube input stage, Class AB headphone amp, and speaker power amp—this extremely versatile design takes advantage of tube warmth, smoothness, and musicality as well as digital amp efficiency. Capable of driving demanding high-performance ‘phones, EF100 also doubles as a go-to integrated amp. Whether you're driving 'phones or speakers, EF100 has your back. 100% Music Direct Guaranteed.

Drives High-Performance Headphones and Moderate-to-Efficient Speakers With Ease
HiFiMan EF100 is a powerful hybrid headphone amplifier and integrated amplifier. Three independent amplifier sections (a vacuum tube input stage works as a shared preamp, a Class AB headphone amplifier, and a new custom-designed speaker-connected power amplifier) reside in the compact chassis. Benefiting from vacuum tube technology, the headphone amplifier and power amplifier sound warm, smooth, detailed and musical. Working as a hybrid headphone amplifier, EF100 can produce a 2w output under a 32-ohm load, so it can easily drive many high-performance headphones. In addition, EF100 can also serve as a hybrid power amplifier to drive speakers of moderate to high efficiency.

Power Amp Output Line Independent From Headphone Amp's Digital Amp Line
In power amplifier mode, the amplifier output line is fully independent from the digital amplifier line used in the headphone amplifier. Driven by front stage’s vacuum tubes, EF100 combines the warmth of vacuum tubes with the high efficiency of a digital amplifier. It is the best of both worlds. When EF100 is used as a power amplifier, it can output 4.5Wpc, enough to drive moderate to high-efficiency speakers.

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Voltage: 110V
Input impedance: 47k
Output impedance: 32-300 Ohm
Headphone Output voltage and output power under 30 ohm load: 7.8v, 2000 mw
Frequency response: 20-20khz +/- 0.2db
Power amplifier output: 4.5 w (4 ohm load)
Frequency response: 20-20khz +/- 1db
D/N(A): 95db
Tube: 6N3J

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