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Angeboten wird „MA-2 Mk 3.3 — OTL Monoblock Pair | Tube amplifiers | Factory-Serviced 3-Year Warranty“ von Atma-Sphere Music Systems als Ausstellungsstück aus der Kategorie „Röhren-Endverstärker“ bei audio-markt.de - dem Online-Marktplatz für High-End. Das Inserat mit der Nummer 2205079745 endet am 03.07.2026 um 01:06 Uhr.
That asking price is ambitious versus the recent EUR comp set: at €17,500, it sits above the €15,456 75th percentile and well above the €11,213 median, so it’s asking for a premium. It is not absurdly off-market, but it’s priced at the top end of what similar recent listings have been asking.
What makes it interesting is the combination of a respected OTL design, factory service, and a 3-year warranty—that lowers the usual anxiety around a big tube monoblock pair and adds real buyer value. If the service is documented and the amps are cosmetically clean, the premium can make sense for someone wanting a ready-to-run, high-output, no-drama purchase; just make sure the warranty terms are transferable and that shipping/installation is handled properly given the size and heat of these units.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Atma-Sphere Music Systems traces its roots to 1976, when founder and CEO Ralph Karsten established the company in Saint Paul, Minnesota, USA. From its inception, this small boutique operation has championed handmade vacuum tube amplifiers, pioneering innovations like the world's first reliable Output TransformerLess (OTL) designs and balanced-line products, including the landmark MP-1 preamplifier. Karsten's patented Circlotronic circuit and direct-coupled OTL output stages set the brand apart, embodying a commitment to enduring quality under the "Twenty-year Rule," which prioritizes components lasting decades without major service.
The brand focuses exclusively on high-end amplifiers, with its core reputation built on pure Class A OTL tube monoblocks and stereos, all hand-wired without circuit boards for superior quietness and dynamics. While preamplifiers like the MP-1 complement the lineup, Atma-Sphere avoids speakers, turntables, DACs, headphones, or cables, recently expanding into efficient solid-state Class D models that align with its efficiency goals without diluting its tube heritage.
Positioned firmly in the ultra-high-end niche, Atma-Sphere commands respect among discerning audiophiles for its transparent, powerful sound and battle-tested reliability, earning accolades across decades. These aren't mass-market or mid-tier offerings but collector-grade pieces for those seeking transformative tube performance in a market dominated by fleeting trends.
See all Atma-Sphere listings on RADAR.
