Fostex TH909
High-end open-back headphones from Fostex, derived from the TH900mk2, designed for wide, detailed home listening.
Description
The Fostex TH909 is a high-end open-back headphone, designed for home listening. It builds on the foundation of the closed-back TH900mk2, retaining its sonic signature, while adopting an open-back design intended to improve listening comfort and reproduction quality in a quiet, controlled environment.
This model incorporates a magnetic circuit delivering a 1.5 tesla interface, or 15,000 gauss, paired with a 50 mm bio-dynamic diaphragm. This combination aims to widen the stereo soundstage, improve resolution and offer a transparent sound reproduction, faithful to the original signal.
The TH909 is aimed at demanding home listeners who are looking for a high-end open-back headphone capable of delivering a wide, detailed soundstage. Its open-back design restricts it to use in a quiet setting, rather than on the move or in noisy environments.
Technical specifications
| Magnetic circuit | 1.5 tesla (15,000 gauss) |
| Diaphragm | Bio-dynamic 50 mm |
What to check before buying used
On these open-back headphones, the ear pad foam and headband padding are the first elements to check: wear or flattening directly affects comfort and the partial isolation of the signal. Also check the condition of the rear grilles, which let air and dust through, as well as the flexibility of the detachable cable and its connectors at the earcups. The wood finish on the headband and earcups deserves a visual check for any cracks or peeling.
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