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Offered is „Filter 3P XLR - Aussteller“ by Octave as exhibit from the category „passive filters“ on audio-markt.de - the online market place for high-end. The advert with the number 1093246961 ends on 17.10.2026 at 06:10 o'clock.
At €1,900, this is fair to slightly attractive versus the known new/retail ballpark of roughly €2,400–€2,800, so you’re not paying anywhere near full freight. Against the €2,000 used asking I found for the same model, this sits a touch under the going used ask and looks like a sensible buy if the unit is clean and complete.
The appeal here is straightforward: Octave’s Filter 3-P is a serious passive noise/EMI filter with wide bandwidth and strong common-mode rejection, so it can tidy up a revealing system without obviously clamping dynamics. It’s the kind of box that tends to reward already-good systems, especially if you’re chasing lower noise floor, calmer treble, and a bit more image focus. If the listing includes the original packaging and the correct balanced or RCA configuration you need, that adds real value.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Octave Audio traces its roots to 1968, when Karl Heinz Hofmann established a transformer winding factory in Karlsbad, Germany. His son, Andreas Hofmann, joined in 1975, developing early semiconductor and tube amplifiers. In 2000, Andreas took the helm, rebranding it as Octave Audio to channel his decades-long passion for tube-based electronics into high-end hi-fi components.
The brand specializes in meticulously hand-built tube amplifiers, including preamplifiers, power amps, and integrated models like the V 16 Single-Ended and Jubilee series. Octave emphasizes premium features such as external power supplies, balanced connectivity, adjustable gain, and modular upgrades for phono stages and power conditioning. Their in-house transformer expertise ensures low-noise performance across full-range designs, from 8-watt single-ended units to 30-watt powerhouses.
Positioned firmly in the high-end market, Octave commands respect among audiophiles for its German craftsmanship, sonic purity, and innovative tube technology. Hand-assembled with top-tier components at their Karlsbad headquarters, these amplifiers deliver uncompromising musicality, appealing to discerning buyers seeking perfection over mass production.
See all Octave listings on RADAR.
