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Ο Tom Christiansen είναι ο μηχανικός που είχε (έχει; )και τη Neurochrome
Key Features of the HPA-1
It is noteworthy, that high levels of intermodulation distortion have been associated with the activation of the fight-or-flight response in humans. Thus, it stands to reason that a low level of intermodulation distortion is crucial to a pleasant listening experience. This is another area where the HPA-1 excels. Thanks to its extremely low intermodulation distortion – in particular on multi-tone tests – the HPA-1 renders the music with an incredible realism and an amazing sound stage without resulting in listening fatigue.
Finally, the ultra-low noise floor of the HPA-1 is responsible for the complete absence of sound during pauses in the music – even when used with sensitive in-ear modules.
https://www.tomchr.com/products/hpa-1
Υπάρχει και ο HPA-10
https://www.tomchr.com/

Key Features of the HPA-1
- World class performance as characterized by ultra-low harmonic distortion, extraordinarily low intermodulation distortion, and ultra-low noise floor.
- Two inputs: XLR (balanced) and RCA (unbalanced), selectable by front-panel switch.
- One output: ¼" (6.3 mm) phone jack.
- Two gain settings: 0 dB (1×) and 12 dB (4×) to accommodate sources ranging from balanced pro/studio sources to media players, phones, and tablets. The gain is selected by a switch on the front panel.
- Protection against excessive DC voltage on the amplifier output. This protects your headphones in the case of a catastrophic amplifier failure.
It is noteworthy, that high levels of intermodulation distortion have been associated with the activation of the fight-or-flight response in humans. Thus, it stands to reason that a low level of intermodulation distortion is crucial to a pleasant listening experience. This is another area where the HPA-1 excels. Thanks to its extremely low intermodulation distortion – in particular on multi-tone tests – the HPA-1 renders the music with an incredible realism and an amazing sound stage without resulting in listening fatigue.
Finally, the ultra-low noise floor of the HPA-1 is responsible for the complete absence of sound during pauses in the music – even when used with sensitive in-ear modules.
https://www.tomchr.com/products/hpa-1
Υπάρχει και ο HPA-10
https://www.tomchr.com/