1. Introducere
The HIFIMAN EF600 is a high-performance desktop balanced headphone DAC (Digital-to-Analog Converter) and amplifier. It integrates HIFIMAN's HYMALAYA PRO R2R DAC technology with a powerful headphone amplifier, offering versatile connectivity options including XLR, RCA, 6.35mm outputs, and high-resolution Bluetooth audio. Designed for home audio environments, the EF600 also functions as a headphone stand, combining functionality with a distinctive aesthetic.

Figura 1.1: Față view of the HIFIMAN EF600 unit.
2. Informații de siguranță
- Citiți toate instrucțiunile înainte de a utiliza dispozitivul.
- Țineți dispozitivul departe de apă, umiditate și temperaturi extreme.
- Nu încercați să dezasamblați sau să reparați unitatea singur. Apelați la personal calificat pentru toate lucrările de service.
- Asigurați o ventilație adecvată în jurul unității pentru a preveni supraîncălzirea.
- Folosiți doar sursa de alimentare și cablurile specificate.
- Adjust volume levels responsibly to protect your hearing.
3. Conținutul pachetului
Verificați dacă toate articolele sunt prezente în colet:
- HIFIMAN EF600 Unit
- Cablu de alimentare
- USB Cable (Type-A to Type-B or Type-C)
- Manual de utilizare (acest document)
4. Caracteristicile produsului
- HYMALAYA PRO R2R DAC: Features advanced R2R DAC technology for low distortion, low noise, and efficient power consumption.
- Powerful Balanced Output: Delivers 5.12W per channel, suitable for driving a wide range of headphones.
- Design termic optimizat: Engineered with a tower case design for convection cooling, placing the center of gravity at the bottom and cooling at the top for stable operation.
- Conectivitate versatilă: Includes USB-B, USB-C, Coaxial, RCA, and Balanced XLR inputs, along with XLR 4-pin balanced and 6.35mm single-ended headphone outputs, and XLR balanced/RCA single-ended line outputs.
- High-Resolution Bluetooth: Supports multiple Bluetooth codecs, including aptX-HD, for high-fidelity wireless audio streaming.
- Integrated Headphone Stand: The unit's design allows it to function as a convenient headphone stand.

Figure 4.1: Internal design and thermal management of the EF600.
5. Controale și conexiuni
5.1 Panoul frontal

Figure 5.1: Front panel controls and indicators.
- Gain/OS Indicators: Display current gain mode (High/Low) and Oversampling (OS) or Non-Oversampling (NOS) status.
- Indicatori de intrare: Show the active input source (USB/Coaxial, Bluetooth, RCA, Balanced In).
- Input Selectors (Left/Right): Buttons to cycle through available input sources.
- Controlul volumului: Rotary knob to adjust output volume.
- XLR 4-Pin Balanced Headphone Output: Pentru căști echilibrate.
- 6.35mm Single-ended Headphone Output: Pentru căști cu un singur capăt.
5.2 Panoul din spate

Figura 5.2: Conexiuni panou spate.
- Antena Bluetooth: Pentru conectivitate Bluetooth fără fir.
- Intrare USB-B: Connect to a computer or other USB audio source.
- Intrare de tip C: Connect to devices with USB-C output.
- Intrare coaxială: Intrare audio digitală.
- XLR Balanced Input (L/R): Analog balanced audio input.
- RCA Single-ended Input (L/R): Analog single-ended audio input.
- XLR Balanced Output (L/R): Analog balanced line output to external ampliificatoare sau difuzoare active.
- Stecher: For connecting the AC power cable.
- Întrerupător: Pentru a porni sau opri unitatea.

Figure 5.3: Front and rear panel overview with OS compatibility notes.
6. Configurare
6.1 Plasarea
Place the EF600 on a stable, flat surface. Ensure adequate space around the unit for proper ventilation, especially at the top, to facilitate convection cooling. The unit's design allows it to serve as a headphone stand, providing a convenient storage solution for your headphones.

Figure 6.1: EF600 used as a headphone stand.
6.2 Conexiune la alimentare
- Before connecting the power cable, locate the AC 115V/230V voltagselectorul de pe panoul din spate.
- Ensure the switch is set to the correct voltage for your region (e.g., AC 115 for North America, AC 230 for Europe).
- Connect the provided power cable to the power connector on the rear panel and then to a suitable AC power outlet.

Figura 6.2: AC Voltage Selector.
6.3 Conectarea surselor audio
The EF600 offers multiple input options:
- USB-B / USB-C: Connect your computer, smartphone, or other digital audio source using a compatible USB cable. For Windows 10 and earlier operating systems, additional drivers may be required.
- coaxial: Connect digital audio sources such as CD players or media streamers via a coaxial cable.
- RCA Single-ended Input: Connect analog audio sources like preamplifiers sau phono stages using RCA cables.
- XLR Balanced Input: For high-quality analog balanced audio input from compatible sources.
6.4 Connecting Headphones or External Ampliificatori
The EF600 provides several output options:
- XLR 4-Pin Balanced Headphone Output: For headphones equipped with a 4-pin XLR balanced connector.
- 6.35mm Single-ended Headphone Output: For headphones with a standard 6.35mm (1/4 inch) single-ended connector.
- XLR Balanced Output (L/R): To connect the EF600's DAC output to an external balanced ampliifier sau difuzoare active.
- RCA Single-ended Output (L/R): To connect the EF600's DAC output to an external single-ended ampliifier sau difuzoare active.
7. Funcționare
7.1 Pornire/Oprire
Flip the power switch on the rear panel to the 'ON' position to power on the unit. Flip it to 'OFF' to power down.
7.2 Selectarea intrării
Use the Left and Right Input Selector buttons on the front panel to cycle through the available input sources (USB/Coaxial, Bluetooth, RCA, Balanced In). The active input will be indicated by the corresponding LED on the front panel.
7.3 Setări de amplificare
The EF600 features different gain modes (High Gain, Low Gain) and Oversampling (OS) or Non-Oversampling (NOS) modes. These settings can be selected via the input selector buttons, and their status is indicated by the LEDs on the front panel. Experiment with these settings to find the optimal sound for your headphones and preferences.
7.4 Controlul volumului
Rotate the large volume knob on the front panel to adjust the output level of the connected headphones or line outputs. Start with a low volume and gradually increase it to a comfortable listening level.
7.5 Asociere Bluetooth
- Ensure the Bluetooth antenna is securely attached to the rear panel.
- Select Bluetooth as the input source using the front panel input selector. The Bluetooth indicator LED will illuminate.
- On your source device (e.g., smartphone, tablet), enable Bluetooth and search for available devices.
- Select 'HIFIMAN EF600' from the list of devices to pair.
- Once paired, the Bluetooth indicator LED on the EF600 may change status (e.g., solid light) to confirm connection.
- The EF600 supports various Bluetooth codecs, including aptX-HD, for high-quality wireless audio.

Figure 7.1: Supported Bluetooth codecs.
8. Întreținere
- curatenie: Folosiți o cârpă moale și uscată pentru a curăța exteriorul unității. Evitați utilizarea de produse de curățare lichide sau solvenți.
- Ventilare: Ensure that the ventilation openings are not blocked by dust or debris. Periodically clean them with a soft brush or compressed air.
- Depozitare: Dacă depozitați unitatea pentru o perioadă lungă de timp, deconectați-o de la priză și depozitați-o într-un loc răcoros și uscat.
9. Depanare
| Problemă | Cauza posibila | Soluţie |
|---|---|---|
| Fără putere | Cablul de alimentare nu este conectat; Întrerupătorul este oprit; Volum incorecttagsetarea selectorului e. | Ensure power cable is securely connected. Turn power switch ON. Verify AC voltage selector is set correctly for your region. |
| Fără sunet de la căști | Incorrect input selected; Volume too low; Headphones not properly connected; Faulty headphones. | Select the correct input source. Increase volume. Ensure headphones are fully plugged in. Test with another pair of headphones. |
| Asocierea Bluetooth eșuează | Bluetooth not selected as input; Device too far; Interference; EF600 already paired to another device. | Select Bluetooth input. Move source device closer. Ensure no metal objects are near the EF600's antenna. Disconnect from other devices. |
| Audio distorsionat | Source audio quality; Incorrect gain setting; Volume too high; Faulty cable. | Check source audio quality. Adjust gain settings. Reduce volume. Try a different cable. |
| USB input not recognized | Incorrect USB cable; Driver issue (Windows); USB input not selected. | Try a different USB cable. Install necessary drivers for your operating system (if applicable). Select USB input. |
10. Specificații
| Caracteristică | Caietul de sarcini |
|---|---|
| Numele modelului | EF600 |
| Tehnologia de conectivitate | Cu fir, fără fir (Bluetooth) |
| Tehnologia comunicațiilor fără fir | Bluetooth (supports aptX-HD, LDAC, AAC, SBC) |
| Mufă pentru căști | 6.35 mm, XLR 4-pin |
| Putere de ieșire | 5.12W per channel (Balanced) |
| Gama de frecvente | 20 Hz - 20,000 Hz |
| Impedanta | 32 Ohm (typical headphone impedance) |
| Material | Metal |
| Dimensiunile produsului | 4.09 x 6.5 x 11.14 inchi (104 x 165 x 283 mm) |
| Greutatea articolului | 6.34 lire sterline (2.88 kilograme) |
| Producător | HIFIMAN |

Figura 10.1: Dimensiunile produsului.
11. Garanție și asistență
HIFIMAN products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the official HIFIMAN website-ul lor web sau contactați direct serviciul lor de asistență pentru clienți. Păstrați dovada achiziției pentru solicitările de garanție.





