Skip to product information
1 of 5

Hifiman EF1000 Hybrid Tube Headphone & Speaker Amplifier - Open Box

Hifiman EF1000 Hybrid Tube Headphone & Speaker Amplifier - Open Box

Final Sale More information
Final sale items are not returnable but they come with a full warranty.
Open Box More information
Open box items are final sale.
Regular price $8,499
Sale price $8,499 Regular price $15,000.00

Amplifier type More information
Translation missing: en.products.product.amplifier_type_info

Vacuum tube

Connectivity More information
Connectivity refers to the method in which the headphones connect to the audio source. Headphones can be either wired or wireless.


Portability More information
DACs and amplifiers can either be carried around or meant for static desktop use

Not Portable

On back order Join our email list to be notified as soon as it is back in stock.
View full details


Hifiman EF1000 Hybrid Tube Headphone & Speaker Amplifier - Open Box

Regular price $8,499
Sale price $8,499 Regular price $15,000.00


This brilliantly designed, superbly powerful and high-performing headphone amp makes the ideal companion to the brand's sublime headphones.

HiFIMAN excels at enhancing the headphone listening experience and the EF1000 is no exception. The brand pioneered the use of orthodynamic technology for their drivers, as opposed to the more conventional dynamic technology.

With headphone models as advanced as the HE-6 and other extremely hard to drive headphones, it is crucial that it is driven by a powerful, high-caliber headphone amplifier. The EF1000 brilliantly answers this demand.


The driver's incredible thinness, less than a millionth of a meter and extremely low mass means it can produce tremendously low distortion levels yet offer a highly dynamic response. 

By combining this diaphragm and "Stealth Magnet" technology each working in harmony, the audio produced is of a remarkable tonal quality and clarity. 

The "Window Shade" on the SUSVARA has been painstakingly optimized to avoid arty-resonant frequencies. This leads to superior aural purity, tonally clean and unadulterated yet provides practical protection for the ultra-fine diaphragm and additional offering an appealing visual aesthetic.


The EF1000 is the SUSVARA's official amplifier, which utilises a separate power supply design. Its SSRP circuit uses six 6922 vacuum tubes and six pairs of transmitters in parallel. The result is a perfect combination of the beautiful sound from the vacuum tubes and the powerful output of a solid state amp.


Special ergonomic design it01L for superb comfort and extended listening.


  • Input Stage: Vacuum Tube SRPP Circuit
  • Headphone Output for 35 Ohms Load: 20w Pure Class A
  • Amplifier Output for 8 Ohms Load: 50w Pure Class A 100w Class A/B
  • SNR (A weight): 108dB
  • Dynamic Range: 111dB
  • THD: 0.15%
  • Weight & Dimensions: