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Offered is „RIO-5 II negative ion generator“ by Acoustic Revive as second-hand device from the category „HiFi-Tuning-Accessory“ on audio-markt.de - the online market place for high-end. The advert with the number 3372289369 ends on 11.11.2026 at 21:13 o'clock.
Timing matters a bit here because this is an older niche product, but at €549 it lands below the €522–€2,503 interquartile band only by a hair? No — against your market anchor, it sits just above the 25th percentile and well below the €851 median, so this reads as a good buy / solid value rather than a bargain-basement steal.
What makes it worthwhile is that Acoustic Revive gear is typically bought for system tuning and incremental refinement, so a clean, working unit can be an easy, low-risk way to experiment with that kind of upgrade without paying mid-market money. If it’s complete and in genuinely good condition, the price is attractive; I’d mainly check that it includes any original power supply or accessories the model normally needs, because with niche accessories like this, completeness matters more than cosmetics.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Acoustic Revive emerged from Japan in 1997, founded by Ken Ishiguro under Sekiguchi Machine Sales Co., Ltd. The brand launched with the innovative RD-1 disc demagnetizer, marking Ishiguro's vision to tackle subtle audio impurities often overlooked by conventional hi-fi engineering. Rooted in meticulous Japanese craftsmanship, it quickly gained traction among audiophiles seeking precision enhancements.
The company's product focus centers on high-end accessories that refine signal paths and system performance, including audio cables, LAN cables, single-core wiring, and anti-vibration platforms. It also excels in power conditioning like AC filters, room tuning resonators, isolation devices, electromagnetic treatments, and disc improvers. Rather than mainstream amplifiers, speakers, or DACs, Acoustic Revive targets optimization tools—often backed by research from institutions like the University of Tokyo—to elevate existing setups.
Positioned as a niche boutique leader in the high-end market, Acoustic Revive commands respect for its boundary-pushing materials and techniques, earning accolades in international audio journals and widespread use in recording studios. Its handcrafted components deliver exceptional resolution and purity, appealing to discerning buyers who prioritize detail retrieval over flashy source gear.
See all Acoustic Revive listings on RADAR.
