HiFiMAN EF-5
Owner's Guide
www.hifiman.com
www.hifiman.com
Key Features and Specifications
Thank you for purchasing the HiFiMAN EF-5 high performance hybrid
headphone amplifier.
This Owner's Guide is intended to provide a useful overview of your new
EF-5 and how to best install and operate it for many years of enjoyment,
safety and satisfaction. Please take the time to familiarize yourself with
its features. If you have any questions or need additional information,
contact your authorized HiFiMAN dealer.
Product Overview
The HiFiMAN EF-5 is a powerful hybrid headphone amplifier. The term
hybrid refers to its integration of the clear top 12 AU7 vacuum tube and
the OPA275 as op-amp. The EF-5 is compatible with a wide range of
headphones of different impedances and efficiencies.
● Hand-built headphone amplifier
● Separate DY-1 power supply with toroidal transformer
● Vacuum tube:RCA Clear top 12AU7
● OP-amp: JRC5532 OPA275
● Input: RCA*1
● Output: 1/4” (6.35mm) headphone jack
● Detachable IEC power cord
Specifications
●
Frequency response: 20Hz-30kHz
●
Distortion: less than 0.2%
●
S/N: more than 95dB
●
Input impedance: 50k Ohms
●
Output impedance: 2 -2k Ohms
●
Output at 32 Ohms: 15v
●
Power supply: 110v/220v
●
Dimensions:4.33"(110mm)Wide X 10.63"(270mm) Deep
X1.97"(50mm) High
●
Weight: 81.1Oz (2.3kg)
●
Accessories: 12AU7 tube, DY-1 power supply(110v-240v)
02
03