Hifisonix X-Altra HPA-1 Class A Headphone Amplifier

You can buy PCB’s for the HPA-1 Headphone Amplifier overĀ  in the Shop. There is also a StandardĀ  PSU+HPA-1 bundle option as well in the Shop. The HPA-1 is a compact, very high performance class A headphone amplifier that will deliver up to 1.75W into a 32 Ohm pair of headphones. The amplifier features ultra-low […]

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