HiFiMAN EF2A Owner's Manual

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Owner's Guide

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HiFiMAN EF-2A

HiFiMAN EF-2A

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Owner's Guide

Thank you for purchasing the HiFiMAN EF-2A, a hybrid headphone

amplifier which combines vacuum tube sound quality with solid-state

technology to deliver outstanding performance.

This Owner's Guide is intended to provide a useful overview of your

new EF-2A 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-2A is a hybrid amplifier design which combines vacuum

tube and solid state design. Unlike traditional vacuum tube amplifiers, the

EF-2A significantly improves the condition of the power source which

in turn increases the output power as well as prolongs the life of the

vacuum tube and the amplifier. The simple signal route and the selected

audiophile elements will provide you with years of reliability, safety, and

enjoyment.

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Key Features

● Hybrid design: Combines vacuum tube with solid state technology

● High quality ALPS potentiometer to control volume

● USB DAC chip: Burr-Brown PCM2702E

● Vacuum tube: Chinese 6J1*2（6AK5）

● OP-amp: OPA2604

● Separate power supply

● Inputs: USB and CD input

Specifications

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Input impedance: 47k Ohms

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Output impedance: 32 - 300 Ohms

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Output at 32 Ohms: 3v, 320mW

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Output at150 Ohms: 6.2v, 256mW

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Frequency response: 20Hz-20kHz±0.2dB

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S/N: 95dB

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Distortion: 0.2％

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Power consumption: <15W

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Input voltage and current: AC 16v, 500mA

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Power supply: 110v/220v

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Dimensions: 5.6" (140mm) Wide X 3.4" (85mm) Deep X1.8" (45mm) High

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Accessories: USB cable, power supply

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