RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
As new in boxRetail $649 Specifications: Power: 2 X 100W @ 8 Ohms Power: 2 X 150W @ 4 Ohms Peak Output Power: 2 X 125W @ 8 Ohms Peak Output Power: 2 X 175W @ 4 Ohms * The maximum power when the output is unilateral is 200W 1% and 290W 10% (when the speaker impedance is 4R.) Input Impedance: 47k Ohms Gain Adjustable: x15 x20 x30 Three-stage gain adjustment Signal to Noise Ratio: > 90dB at 1W, 10W, 100W THD+N: <0.005% Frequency Response: 10Hz to 50kHz Worldwide AC voltage: 100 ~ 240Vac AC Fuse: Slow-blow, 5A, 250VAC Dimension: 151 mm W x 136 mm D x 51 mm H (including feet) Weight: 1.8 kg
Fair ask, edging slightly to good value. At US$429, this sits a bit above the clearest low-water used examples I could verify, but still well below new pricing, so it’s not an overreach if the unit is clean and fully functional.
The STA-100 is a compact, respected stereo power amp with a strong reputation for grip, low noise, and a tidy, punchy presentation that suits a lot of real-world systems. If it’s original-owner, includes the box/manual, and has no channel imbalance or relay/startup quirks, this is a sensible buy rather than a bargain-bin score.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
NuPrime Audio is a California-born hi-fi brand founded in 2014 by Jason Lim, the co-founder of NuForce’s high-end division. After NuForce’s premium assets were acquired, NuPrime was established to carry that engineering lineage forward, keeping a strong link to the earlier company’s reputation for compact, high-performance electronics. The brand is now managed by Nuoem Pte. Ltd., reflecting an international business structure even as its identity remains rooted in U.S. audio design.
NuPrime is best known for amplification and digital electronics: integrated amplifiers, stereo and mono power amps, preamps, DACs, streamers, phono stages, and related components. Its catalogue leans heavily toward Class D and hybrid designs, often paired with proprietary input stages and compact chassis aimed at high efficiency and low distortion. It is not primarily a speaker, turntable, headphone, or cable brand.
In the market, NuPrime sits in the serious enthusiast and upper-mid to high-end niche. It appeals to buyers who value technical innovation, small-footprint components, and a clean, modern presentation over nostalgia or luxury styling. The brand has a strong reputation among detail-oriented hi-fi listeners, especially those looking for ambitious electronics at prices below the ultra-exotic summit-fi level.
See all NuPrime listings on RADAR.
