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Great Headphone Amplifier in Excellent used condition.Includes Tube and Power supply.No manual or original boxPlease examine photos for condition/detailsWill be safely packed and insured.Here is some info from Bellari: The new HA540 MK2 headphone amplifier has exceeded our expectations—even more so than the original Bellari HA540. This 12AX7 tube amp delivers a lush, musical sound, powered by 150 volts regulated to the tube plates. With generous gain on tap, it effortlessly drives headphones ranging from 8 to 2000 Ohms.Its dual-input design is smartly executed, making it equally compatible with a variety of source components. Whether you’re plugging in a CD player, computer, smartphone, or DAC, the HA540 MK2 delivers superb clarity. Thanks to its zero-feedback circuit, the sound remains smooth and naturally analog. It has a way of drawing you into the music—making everything feel more alive and engaging, with a satisfying sense of weight and authority behind each note.In a market flooded with headphone amps priced anywhere from $99 to $1999—and some pushing past $7000—it’s tough to find products that offer real, tangible improvements in sound or build quality. Sorting through online reviews can be frustrating, especially when some are clearly paid for or lack real-world perspective.Here’s what we can tell you with certainty: the HA540 MK2 is hand-built in Salt Lake City, Utah by seasoned audio professionals who’ve been in the game for decades. We’ve witnessed the full spectrum—from overhyped snake oil to genuinely excellent gear that never got the recognition it deserved.The HA540 MK2 stands out as a sincere, high-quality headphone amplifier. While it’s not the cheapest option out there, it’s an exceptional value for what it offers. Of all the headphone amps we’ve tested—regardless of price—it has the lowest ear fatigue and one of the most satisfying listening experiences we’ve encountered. Specifications:Input Impedance: 47k ohmsOutput Headphone impedance : 8 Ohms to 2000 OhmsMax Output Gain: 19.6 dBTHD: .04% @ 20 Hz-20K Hz, at 1V RMS S/N Ratio: >80 dB unweightedMax Output Power: 332 mW/side, 664 mW/Stereo ( @ 30 Ohms )Frequency Response: 6 Hz – 51 kHz +/- 3 dBPhase Shift (In to Out): 0 dbCrosstalk: – 75
At US$169, this sits very close to the US$157 median for recent used comparables, so it reads as a fair, buyable price rather than a steal or a stretch. It’s comfortably inside the normal market band between US$61 and US$398, which is exactly where a healthy used headphone amp should land.
What makes it worthwhile is the Bellari’s straightforward Class A design and the fact that these compact desktop amps are liked for a smooth, full-bodied presentation with enough drive for most headphones. If the unit is clean, powers up properly, and includes the original PSU, that’s enough to make it an easy enthusiast pickup at this price.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Pro-Ject Audio Systems traces its roots to 1991 in Austria's Weinviertel region, north of Vienna, where founder Heinz Lichtenegger launched the brand amid the CD revolution. Kicked out of music school as a youth, Lichtenegger channeled his passion for analog sound into affordable, high-quality turntables at a time when vinyl seemed obsolete. His debut Pro-Ject 1, hand-assembled in the Czech Republic, earned rave reviews as a top high-end device, igniting a success story that relocated headquarters to Vienna before returning to Mistelbach in Lower Austria.
The brand excels in turntables, establishing itself as the world's largest and leading producer in that category, while expanding into a full spectrum of hi-fi components since 2000. Offerings include amplifiers, DACs, headphone amps, speakers, cables, and phono stages, all emphasizing essential sound reproduction with durable materials and minimalist design. Manufacturing remains European—primarily in Czechia, Slovakia, and Germany—prioritizing sustainability through local sourcing, short transport, and products built for longevity.
Pro-Ject holds a commanding niche as the go-to for mid-tier audiophiles seeking boutique European craftsmanship without extravagant pricing. Distributed in over 80 countries, it appeals to vinyl revivalists and discerning buyers who value analog purity, innovation, and value-driven performance over flashy excess, cementing its reputation as a pioneer in accessible high-fidelity.
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