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Plinius 9100 Integrated Amplifier (Solid State) Note: happy to sell both this and the Koru phono stage together for a better price of $4000 for both, drop me a line if you're interested! Beautiful condition 9100, an absolute classic amp from Plinius, in the (still) current curve facade form factor. This unit is fresh back from a service, clean bill of health and ready for trouble free motoring. The function labelling is crisp and unworn too. Comes with the original deadly weapon/remote control - an extruded girder of aluminium with a dazzling array of functions, from volume control to mu
Being an older, discontinued integrated rather than a current-model buy, the timing mostly matters for condition and service history. At A$4,000, this looks a bit ambitious for a used 9100 unless it’s exceptionally clean, recently serviced, and includes the phono stage and original extras; in the broader used market, I’d expect more like the low-to-mid A$3,000s for a straightforward example.
What makes it worth considering is the Plinius house sound: plenty of drive, real grip on speakers, and a smooth, composed presentation that still feels authoritative. The 9100 has a strong reputation for doing the hard stuff well without sounding clinical, and the built-in phono stage adds genuine value if you spin vinyl. If you can confirm quiet operation, healthy controls, and no repair history issues, it’s still a serious piece of kit.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Plinius Audio: New Zealand's Amplifier Specialist
Plinius Audio Systems was established in 1980 by Peter Thomson, a mechanical engineer based in New Zealand who developed a passion for high-fidelity amplifier design. The company gained rapid recognition within its home market and solidified its position through a 1987 merger with Craft Audio Limited, bringing designer Gary Morrison into the fold. This partnership proved pivotal, establishing Audible Technologies Limited as the production entity and introducing the asymmetrical circuit design philosophy that would define the brand's engineering approach. Today, Plinius remains headquartered in Christchurch, New Zealand, where all design, manufacturing, and marketing operations are conducted in-house.
Plinius has built its reputation almost exclusively around power amplifiers and preamplifiers, with particular acclaim for their Class A designs. The company's product lineage spans from early dual-mono configurations in the 1980s through sophisticated monoblock amplifiers and refined preamp stages. Their engineering ethos emphasizes meticulous hand-assembly and attention to sonic detail, with each unit individually built by dedicated craftspeople. This focused product strategy—rather than diversifying into speakers, digital sources, or accessories—reflects the brand's deep specialization in amplification.
Positioned as a high-end, boutique manufacturer, Plinius commands respect among serious audiophiles despite limited mainstream visibility outside New Zealand and select international markets. The brand is recognized for producing powerful, sophisticated amplifiers that prioritize sonic purity and engineering integrity over mass-market appeal. While once more prominent in enthusiast circles, Plinius maintains its standing as a niche, quality-focused producer valued by discerning listeners who prioritize amplifier excellence and New Zealand craftsmanship.
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