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At £1,333, this Octave Black Box power supply is a strong bargain, sitting well below the 25th percentile of £101 in our recent GBP comparable listings and far under the £1,910 original retail price. While the median asking price for similar units is £176, the 75th percentile soars to £2,961, indicating a wide spread where this listing lands in the excellent value zone for a used unit that once cost nearly double.
The Black Box is a revered linear power supply that dramatically cleans up noise for Octave preamps and DACs, delivering tighter bass and smoother highs. At this price, it’s a rare opportunity to grab a high-end PSU that’s often overlooked until audio upgrades demand it. Unless the condition is questionable or accessories are missing, this is a clear buying opportunity for enthusiasts seeking genuine performance gains without the new markup.
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.
