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Walnut F1

Out Of Stock Walnut F1 - F1

Walnut F1 2.5mm Balanced & 3.5mm Output HiFi Audiophile Portable Headphone Amplifier AMP

The earbud comes without packaging box.


  • The size of the amp is small, 80 * 50 * 20mm, slightly smaller than a bank card, but the small amp also has great wisdom. The sound of this amp should be said that the rivals himing is enough, in simple terms, the sound is sweet. After adding the amp, you can feel out the sound field is significantly large, the original equipment of amplifier is OPA2604 of the BB. The characteristics of the sound in general is warm and delicate, strong driving force, with "bile". Low-frequency has quality and quantity. At the same time 2.5mm version with a balanced output, balanced output has been applied to professional recording field, balanced output is characterized by high degree of separation, the drive is about twice the power output.
  • The OP amp is used of OPA2604 of BB, OPA2604 is designed for audio and special OP amp, sound mellow, rounded, neutral warm, bile is very strong, is known as the most electronic tube audio amplifier. And it feels like he upgraded version of 5532, all aspects have greatly improved, good resolution, music taste better, there is bile, the sound is relatively thick and a bit rigid, comprehensive quality is very good, especially for music performance.
  • This amp can be replaced by the op amp. Direct plug design, is now the mainstream design, different op amp to bring a different tone.
  • It almost completely used the machine's power supply circuit, up to 24V (+12 V gnd -12V) of the pressure, easy to control the various types of op amp on the market, launched a loud field with strength. It supports charge, when you are listening music.
  • Power supply part of the selection is 24v 1A power supply, ripple very small (using the commonly used three-terminal regulator 78M12 79M12, no noise at the end under normal circumstances), the filter capacitor is high-quality capacitors of Ina vr series and Nikon gold fw series. It is used of the imported high current full-shielded inductors.
  • It used class A current amplification plus op amp voltage amplification, can be better to release low-medium-high impedance in various types of headphones (16 ohm-400 ohm). Meanwhile due to the high supply voltage, prolonged use of the shell will be a slight sign of heat (not more than 30 degrees).
  • The use of 3.7V high-capacity lithium battery-powered, boost to 24v and maximum current is 1A, battery capacity is 1500mah, life 4 to 5 hours or so. When charging, you can use the common charging cable of Android. Don’t use in charging, and the charging time is about 2 and a half hours. (When charging, the red light is on; when stop charging, green light is on)
  • This is the second amp Walnut launched, the use of high-grade components. Output coupling DC blocking capacitor using Nikon FW capacitors, the strength of the extraordinary is enough to be among the ranks of the world's advanced audio capacitors. Using the OFC oxygen-free copper feet, very low distortion (third harmonic distortion-120dB), very small tangential loss, natural silk fiber media, high-quality sound, play silk soft and natural, enhanced resistance to acoustic oscillation design, increase the low-frequency of thickness sense , reduce the high-pass part of the peak feeling and medium-frequency part of the rough sound quality.


  • Interface: 2.5mm balanced & 3.5mm output interfaces
  • Output power:300mW
  • Operational Amplifier Chips Model: OPA2604
  • SNR: 90dB
  • Lithium battery capacity: 1500mAh
  • Charging Interface: Standard MICRO USB.


  • Headphone Amplifier
  • Charging Cable
  • AUX Cable
  • 2pcs Silicone straps

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Due to the impact of the COVID-19 pandemic, global international shipping will delays. The delay at our Hong Kong post office is very serious, so we have changed to other fastest or most efficient international shipping. Now the normal estimated delivery time may be delayed by about 1-2 weeks. In some countries where is higher free-tax rate, we will provide free courier service as much as possible.

Free Shipping

All listed items will be shipped though Registered Airmail with tracking number if there is no extra shipping method option listed or shipping description in the product page.

Economy shipping: Will be shipped without tracking number.

Registered Airmail : Will be shipped via such as Hong Kong post , Deutsche Post , Netherlands Post , Singapore Post, you can leave us a message if you have any requirement about the shipping method .

It will be shipped via Hong Kong Post by default, Europe countries can choose to be shipped via Deutsche Post or Netherlands Post, it is also FREE, pls leave us a message if needed.

Express service: Will be shipped via DHL/EMS/UPS/FedEx

  • Views: 14405
  • Product Code: F1
  • Availability: Out Of Stock
  • $29.90

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Tags: Walnut F1, Walnut F1 2.5mm Balanced & 3.5mm Output HiFi Audiophile Portable Headphone Amplifier AMPThe earbud comes without packaging box.DescriptionTh, F1