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This is a fair ask, sitting above the £590 median but comfortably below the £661 75th percentile for recent used examples. At £645, it is not a bargain, but it remains defensible for a clean, complete unit; the unknown condition is the main reason not to stretch further.
The Nait 5si is a very enjoyable, rhythmically engaging integrated with taut bass, strong dynamics and more real-world drive than its 60W rating suggests. Its four analogue inputs, headphone output and AV-bypass facility make it versatile, while the straightforward design has aged well. Confirm that the remote, mains lead and speaker-terminal adaptors are included, and check for clean operation of the volume control and all inputs. If condition is genuinely good, this is a sensible buy; a little negotiation would make it notably stronger.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Naim Audio, a cornerstone of British hi-fi excellence, traces its origins to 1973 when Julian Vereker, a self-taught engineer, racing driver, and music enthusiast, formally incorporated the company in Salisbury, Wiltshire. Vereker's journey began earlier, in 1969, experimenting with tape recording and sound-to-light boxes before designing his first power amplifier in 1971. Amid the British hi-fi industry's recession, he secured a pivotal contract with Capital Radio, blending entrepreneurial grit with a passion for authentic sound reproduction that challenged conventional wisdom.
The brand specializes in premium integrated amplifiers, power amplifiers, preamplifiers, digital streamers, DACs, and compact music systems, often featuring built-in amplification for streamlined setups. While not delving into speakers—beyond a historical foray—or headphones and turntables, Naim emphasizes modular, upgradable components that prioritize pace, rhythm, and timing (PRaT), a signature sonic philosophy rooted in the "source first" approach alongside contemporaries like Linn.
Naim holds a commanding position in the high-end market, revered by discerning audiophiles for its handmade, innovative systems that deliver emotional musical engagement over mere specifications. Now part of VerVent Audio Group following a 2011 merger with Focal, it exports to over 45 countries, sustaining a cult following for resilient, influential designs that transcend economic cycles.
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