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Home News

Fostex TH909 Premium Headphones

Marco Lisi by Marco Lisi
July 13, 2026
in News, Headphones
Reading Time: 2 mins read
fostex-th909-premiumheadphones3

TH909 is a flagship premium headphones based on the reputed closed type TH900mk2.  While keeping the same sound characteristic, they further expanded and increased its sound field by adopting open back construction and adjusting the acoustic circuit design.

fostex-th909-premiumheadphones4

The TH909 offers a wider dynamic range and low distortion, utilizing a 1.5 Tesla 50mm driver with repulsion magnets.

The diaphraghm is constructed from Biodynina, accomplishing rich low-end frequencies, natural mid-range, and an excellent presence in high-frequency production.

fostex-th909-premiumheadphones1.jpg

The housing features a double-layer structure composed of etching metal, diversifying the resonance points and presenting a gorgeous appearance. It is finished with a Japan Lacquer in Bordeaux manufactured by the Sakamoto Urushifactory, established 110 years ago.

fostex-th909-premiumheadphones2

The TH909 includes a detachable 7N grade (99.999999%) high-purity OFC (Oxygen Free Copper) unbalanced cable (ET-H3.0N7UB) featuring a plug sleeve made of durable duralumin and rhodium-plated connections. Interior witing is also constructed from 7N grade materials.

The newly-designed earpad uses a low-resilience cushion for a more comfortable fit.

Tags: Headphones
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Marco Lisi

Marco Lisi

Publisher

Marco Lisi is the publisher of Best of High End, part of AV Concepts BV. His path into audio started early: as a teenager he was drawn into the world of free radio, presenting shows and living immersed in music every day. In his early twenties he ran his own production studio for five years, creating jingles and commercials — hands-on training in sound design, pro-audio workflows, and critical listening through studio monitors that still shapes how he evaluates gear today. He also spent years DJing in clubs before moving into publishing, first at two earlier online magazines before founding Best of High End. His hi-fi and home cinema passion was inherited from his father, an inveterate system-swapper. Marco's first setup — a confirmation gift — paired AKAI separates with entry-level Bowers & Wilkins speakers, a brand he stayed loyal to for years as his system grew from stereo into full surround and home cinema. Like many enthusiasts, he went through an extended "audiophile" phase chasing the next upgrade, before settling into a more grounded view: gear as a means to enjoy music and film, not an end in itself. Years of critical listening have given him a well-trained ear — the ability to characterize a system or pinpoint a change in the chain quickly and accurately. Just as important, his teaching background (a Belgian "regent" degree in Dutch language) gives him the tools to translate those listening impressions into clear, readable writing.

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