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£50 is a fair asking price, sitting just above the £46 median and below the £55 upper quartile for comparable used examples.
The ZP100 remains a useful, solidly built all-in-one streamer/amplifier: its 50W-per-channel output is ample for most bookshelf speakers, while analogue inputs, a subwoofer output, and Sonos multi-room integration add practical flexibility. It is particularly appealing if you already run an S1-era Sonos system or want an inexpensive amplifier for a secondary room. At £50, check that it powers up, joins the S1 app, and includes its mains lead; support is limited to the legacy S1 platform, so it makes less sense as a new standalone Sonos investment.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Sonos emerged from Santa Barbara, California, in 2002 as Rincon Audio, Inc., founded by John MacFarlane, Craig Shelburne, Tom Cullen, and Trung Mai. MacFarlane's success with Software.com provided crucial seed funding for their audacious goal: a wireless multi-room music system free from the wires and complexity plaguing home audio at the time. Renamed Sonos in 2004, the company debuted its pioneering ZonePlayer and controller in 2005, cementing its roots in innovative, user-centric sound technology.
The brand specializes in wireless speakers, soundbars, and home theater systems designed for seamless multi-room playback and integration with streaming services. Sonos offers everything from portable Bluetooth options like the Roam to high-fidelity architectural speakers and subwoofers, alongside recent forays into headphones and whole-home audio solutions. Amplifiers, turntables, DACs, and cables fall outside their core focus, which prioritizes app-controlled ecosystems over traditional hi-fi components.
Sonos holds a commanding mid-to-premium position in the consumer audio market, renowned for inventing wireless HiFi and setting the standard for effortless, high-quality sound. Trusted by audiophiles and casual listeners alike, it blends accessibility with sonic excellence, dominating the smart speaker segment while appealing to discerning buyers seeking scalable, future-proof systems.
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