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EF6 Class A Solid State Headphone Amplifier


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SKU: EF6 Categories: ,


Reference-quality performance for your best headphones

HiFiMAN’s flagship EF-6 headphone amplifier provides audiophile sound quality for the world’s most demanding headphones — and headphone listeners. Weighing in at an astonishing 24 pounds (more than many home receivers!), this “tank” of an amp delivers enough power to drive virtually any cans with ease. It makes an especially fine match with HiFiMAN’s own planar magnetic models, including the HE-6. If you’re looking for no-compromise, reference-quality amplification to bring out the full potential of your best headphones, the EF-6 is a clear winner.

The strong, silent type

The EF-6’s first-class fit and finish go hand-in-hand with exceptional performance under the hood. Its thick aluminum faceplate forms a strong frame around the amp’s precision, custom-built volume control. The EF-6 powers up your music using pure Class A MOSFET amplification — an amp design long valued by audiophiles for its tonal purity and open sound. An ultra-low noise floor ensures your music springs to life from a dead-silent background with powerful dynamics and lushly rendered detail. You’ll clearly hear every thrilling note — from a deep, powerful electric bass run, to the delicate, woody overtones of a marimba, to the natural brassy ring and slow decay of a crash cymbal.

Versatile connections for your headphones and your system

To accommodate a wide variety of headphones, the EF-6 offers both 4-pin balanced and standard 1/4″ jacks with a unique locking design to keep your cans firmly connected at all times. In addition to its outstanding performance with headphones, the EF-6 can also double as a preamp to create a simple, high-quality sound system. You can connect up to three audio components using the rear-panel RCA inputs or front-panel 1/8″ minijack connector, then connect the EF-6’s preamp outputs to the amp and speakers of your choice. A front-panel switch lets you choose between sources, while the volume control adjusts signal output to your preferred listening levels — ideal for matching the volume to your music and mood.

Technical Specifications:

  • high-power, Class A MOSFET headphone amplifier
  • hand-made 24-step attenuator volume control for high-accuracy sound
  • rear-panel gain switch for use with high-efficiency headphones
  • THD: 0.03% (at 1000Hz/ 1 watt)
  • signal-to-noise ratio: 95dB
  • output power: 5 watts at 50 Ohms
  • 2 pair line-level RCA inputs
  • 1 front-panel minijack (1/8″) input
  • 1 pair RCA preamp outputs
  • two locking stereo headphone outputs: 1 full-size (1/4″), 1 four-pin XLR
  • detachable AC power cord
  • 13-1/4″W x 4-13/16″H x 15-7/8″D
  • weight: 24 lbs.