NuPrime HPA-9
NuPrime HPA-9 analogue preamplifier with MM/MC phono input and built-in headphone amplifier operating in pure Class A, for vinyl enthusiasts and high-end headphones.
Description
The NuPrime HPA-9 is an analogue preamplifier combining an MM/MC phono input with a built-in headphone amplifier. It allows several sources to be centralised around a single unit, whilst offering quality headphone listening without the need for an additional dedicated device.
Its power supply relies on a toroidal transformer paired with high-capacity capacitors, designed to deliver the stability and current reserve required for optimal operation of the analogue stages. The preamplifier section uses low-noise FET transistors, a choice that limits noise added to the signal and preserves the dynamics of the reproduced music. The headphone amplifier, meanwhile, operates in pure Class A, a mode renowned for its linearity and its ability to reproduce a natural, detailed sound.
The unit features four high-quality RCA inputs, designed to limit interference between sources and the unit, making it easier to connect several analogue devices within the same system.
This preamplifier is aimed at vinyl enthusiasts with a turntable fitted with an MM or MC cartridge, as well as users of high-end headphones seeking dedicated, refined amplification. It is particularly well suited to those wishing to bring several analogue sources together around a single versatile unit.
What to check before buying used
The quality of the volume potentiometers is worth checking: crackling or a channel imbalance at the start of the travel often indicates worn tracks. The phono stage, sensitive to interference, should be tested with both an MM and an MC cartridge to rule out any background noise or hum linked to earthing. A check of the Class A headphone amplifier is also recommended, as this mode of operation generates more heat in the components and can accelerate ageing of the power supply capacitors.
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