FiiO FT1 Pro

With its self-developed 95x86mm planar driver and technical innovations such as the 1µm sapphire-aluminum double-coated diaphragm, the FT1 Pro positions itself as a serious alternative to dynamic models in its price range.

Next-Generation Planar Magnetic Technology

At the heart of the FT1 Pro lies its large planar magnetic driver (95x86mm), fully developed by FiiO. This approach allows the brand to control every aspect of the design, from the ultra-thin 1µm diaphragm to the uniform magnetic system that ensures even distribution of the magnetic field. The diaphragm features a double sapphire and aluminum coating, a combination that enhances sound clarity and frequency response while delivering a distinctive acoustic signature.

The technical innovation doesn’t stop there: FiiO has integrated 28nm semiconductor process technology for diaphragm manufacturing, borrowing methods from the electronics industry to optimize component durability and performance. This technological approach results in an extended frequency response from 7Hz to 40kHz, far beyond standard human hearing capabilities.

Open Architecture and Mechanical Design

Unlike the closed-back FT1, which uses wooden shells, the FT1 Pro adopts an open-back design with perforated grilles that allow the driver to breathe. This architecture provides a wider soundstage and a sense of spaciousness characteristic of open-back headphones, at the cost of zero acoustic isolation from the external environment.

The 3-axis adjustment system offers precise adaptation to different head shapes: horizontal rotation up to 35°, tilt up to 45°, and slider extension up to 38mm. The steel rails give a distinctive mechanical look, though some users may find this aesthetic less refined than more conventional designs.

Modern V-Shaped Sound Signature

Various analyses converge on a V-shaped sound signature, characterized by detailed highs with remarkable extension up to 20kHz, balanced by present but differently tuned bass depending on the planar drivers. This tuning avoids the pitfall of harshness often criticized in V-shaped signatures, thanks to natural textures that prevent listening fatigue.

The midrange shows a slight dip between 1.5 and 2kHz, which can make vocals sound slightly recessed depending on the music genre. However, this characteristic can be easily compensated for with an equalizer for users seeking a more prominent vocal presence.

Dynamics are one of the FT1 Pro’s unexpected strengths: contrary to common beliefs about entry-level planar drivers being more compressed, this model displays liveliness and impact comparable to dynamic driver headphones.

Evolution Compared to the Closed-Back FT1

Comparison with its closed-back predecessor reveals distinct technical choices. The FT1 Pro has less sub-bass and mid-bass, which may make it seem less dynamic and lively during direct listening. However, this more measured approach excels at rendering complex tracks that require precision and separation—areas where planar drivers demonstrate their technical superiority.

The weight increases slightly (374g vs. 340g), but the sense of build quality remains comparable between the two models. This continuity in materials and finishes makes it easy for FiiO users to expand their collection.

Complete Accessories and Versatility

FiiO provides a comprehensive set of accessories, including two separate cables (3.5mm single-ended and 4.4mm balanced), a 6.35mm adapter, and a hard carrying case. This approach eliminates the need for additional purchases often required with other brands and allows for immediate use with various audio sources.

The 20Ω impedance and 95dB/mW sensitivity make the headphones easy to drive from portable sources without dedicated amplification, while still allowing for upgrades with more sophisticated amplifiers.

Technical Specifications

Design and Technology

• Type: open-back
• Coupling: circumaural (over-ear)
• Transducers: 95 × 86 mm planar magnetic
• Diaphragm: 1 μm double-coated sapphire + aluminum
• Magnetic field: uniform
• Quality processing technology: 28 nm

Acoustic Performance

• Frequency response: 7 Hz – 40 kHz
• Impedance: 20 ohms
• Sensitivity: 112 dB / Vrms @ 1 kHz / 95 dB / mW @ 1 kHz

Connectivity and Cables

• Configuration: Y-cable
• Material: silver-plated oxygen-free copper
• Length: 1.5 m
• Ear cup connectors: dual 3.5 mm TRS
• Source connectors: 3.5 mm and 4.4 mm
• Included adapter: 3.5 mm to 6.35 mm

Ergonomics and Comfort

• Earpad pressure: 4.5 N ± 0.3 N
• 3-axis adjustments:
  • Horizontal rotation angle: 35°
  • Tilt angle: 45°
  • Extendable slider: up to 38 mm
• Earpads: synthetic leather and breathable fabric
• Headband: breathable fabric
• Replaceable parts: earpads and cables

Included Accessories

• Storage pouch
• 4.4 mm balanced cable
• 3.5 mm unbalanced mini-jack cable
• 3.5 mm to 6.35 mm adapter
• Quick start guide

General Information

• Weight: 374 g