FiiO JT9 – Open-back planar that folds to travel
The JT9 is an open-back planar magnetic headphone for listeners who want a large-driver planar stage without the bulk. A custom 95 × 86 mm driver with an ultra-thin diaphragm delivers fast, detailed sound, while a 365 g foldable build keeps long sessions comfortable and makes it easy to pack away. A standout open-back from the FiiO range at Soundium.
Key Features
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95 × 86 mm planar driver: Large custom driver with an ultra-thin diaphragm for quick, detailed transients.
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Open-back design: Spacious, natural soundstage that lets recordings breathe.
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Dual-coating diaphragm: Patented coating with a uniform magnetic field for lower distortion and even drive.
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365 g lightweight build: Comfortable over long listening despite the large drivers.
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Foldable: Collapses down for storage and travel.
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Balanced and single-ended cables: Both 3.5 mm and 4.4 mm balanced cables in the box.
Customer Benefits
Open-back planars usually reward you with a wide, honest stage but ask you to stay put. The JT9 keeps the stage and adds portability: it folds flat and stays light at 365 g, so it travels between desk and sofa without complaint. With both a single-ended 3.5 mm and a balanced 4.4 mm cable included, it slots straight into a desktop amp or a balanced portable source the day it arrives.
Quick Specs
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Driver: 95 × 86 mm planar magnetic
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Design: Open-back, over-ear
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Sensitivity: 95 dB/mW
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Weight: 365 g
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Cables: 3.5 mm single-ended and 4.4 mm balanced
What's in the Box
- JT9 headphones
- 3.5 mm single-ended cable
- 4.4 mm balanced cable
Ideal For
Critical listening at the desk, balanced-source setups, and listeners who move their planars around the home.
Pros & Cons
✅ Pros:
- Large 95 × 86 mm planar driver with an ultra-thin diaphragm
- Light and foldable for an open-back planar
- Balanced 4.4 mm cable included alongside 3.5 mm
- Open, natural soundstage
⚠ Cons:
- Open-back design leaks sound, so it is not for shared spaces or commuting
- Gets the most from a dedicated headphone amplifier
If you want a planar stage you can fold up and carry between rooms, the JT9 earns its place on the desk. Find the FiiO JT9 at Soundium.
