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Offered is „PROline 2500 / aus der Händlervitrine NOS“ by Ultrasone as exhibit from the category „Wire bound Headphone“ on audio-markt.de - the online market place for high-end. The advert with the number 4862833849 ends on 29.10.2026 at 13:14 o'clock.
Ultrasone’s Proline 2500 has a bit of cult status: airy, fast, and a little more analytical than warm, with that big open-back presentation that still makes it interesting years later. At €180, this looks fair rather than flashy for the current used market; it isn’t a steal, but it’s comfortably in the sensible range for a clean, working pair.
What makes it worth a look is the combination of rarity and character: if you want a spacious, lively headphone with strong detail and punch, the Proline 2500 still has a distinct voice. A good-condition example is the kind of buy that rewards enthusiasts who already know they like Ultrasone’s presentation; just verify pads, headband wear, and that the original cable is intact, since age-related cosmetics matter most here.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Ultrasone is a German headphone specialist founded in 1991 in Wielenbach, Bavaria, with its origin story tracing back to headphone research begun in 1985; some company materials also credit founder Florian M. König. It is a comparatively focused brand rather than a broad hi-fi manufacturer, and its identity has long been tied to private-label craftsmanship and German engineering.
The company is known primarily for headphones, especially closed-back and circumaural designs, rather than for amplifiers, speakers, turntables, DACs, or cables. Ultrasone built its reputation around proprietary ideas such as S-Logic and ULE (Ultra Low Emission), which it used to differentiate its headphones in both consumer and professional audio.
In the market, Ultrasone sits in the niche premium-to-high-end segment: it is not a mass-market brand, but a specialist maker with a strong identity among headphone enthusiasts and audio professionals. Its products have historically emphasized technical novelty, German manufacture, and a distinct sonic presentation, which gives it a boutique appeal without being purely vintage or collector-oriented.
See all Ultrasone listings on RADAR.
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