audio-sound @ hatena

An audio review & news blog. The volume should not exceed 80 dB is recommended. I usually adhere to the safe-listening style by WHO. Please note that my aural impressions and interpretations of measurements are also made from a safe-listening style.

(News) iF Classic 51: 5 Balanced Armature Drivers Earphones

iF Classic 51

iF Classic 51


The flagship IEM "iF Classic 51" equipped with 5BA is now available at Linsoul.



  • 5 Balanced Armature Drivers Earphones & crossover technology
  • Attractive Look
  • Ergonomic Design
  • IP57 Sweat-proof And Dustproof
  • High-Quality Silver-Plated Copper Cable & Interchangeable Cable Design



  • Frequency response: 18-28KHz
  • Plug: 3.5mm
  • Sensitivity: 112dB
  • Impedance: 25 ohms
  • Distortion Rate: ≤1%
  • Noise reduction: ≥40dB
  • Driver unit: 5 Balanced Armature Drivers


5 Balanced Armature Drivers Earphones & crossover technology

The iF Classic 51 earphone stands out for its five high-quality balanced armature drivers, which deliver a supreme auditory experience. It can completely cover the frequency response range of 18HZ-28KHZ. The use of a 5-unit custom moving iron is not only a reflection of technology but also of CURRENT iF51's musical values. It delivers super smooth, detailed sound output with good resolution, and better performance of the vocal and sound stage. Experienced acoustic engineers at iF Classic 51 have arranged the 5-driver configuration in a three-way frequency division using professional crossover technology. This allows the drivers to perform perfectly while maintaining low distortion levels.


Attractive Look

The whole earphones are made of handmade transparent crystalline cavity material, and every color match is thoughtful and natural. iF Classic 51 offers four popular colors, you can find one that suits your mood and desire. Good earphones are not only due to good sound quality but also should be a unique and excellent accessory.



Ergonomic Design

Combined with excellent ergonomic design, it will not feel uncomfortable to listen to music for a long time. Lightweight ear hooks keep the earphones securely, even during vigorous movement. Just sink into your music world.



IP57 Sweat-proof And Dustproof

IP57 waterproof and dustproof thanks to the sealed cavity and glazed coating, IP57 waterproof rating offers more possibility to use for sports or even in the rain. The earphones are more durable and suitable for many environments.



High-Quality Silver-Plated Copper Cable & Interchangeable Cable Design

For materials, we strictly selected some of the high-end materials in this market. iF Classic 51 is equipped with premium high-purity silver-plated material that is committed to bringing the ultimate music experience to music lovers. Adopt a standard MMCX connector, it can be replaced with another earphone cable and turned into TWS earbuds in seconds. Get more sound quality experience, matching the mainstream IEM in the market.



Pricing & Availability

The iF Classic 51 is available for $269.99 on Linsoul and others.


iF Classic 51

iF Classic 51

iF Classic 51