HVT tested the OOR headphone amp

NA DE REVOLUTIE GAAT DE ZON PAS ECHT SCHIJNEN

Read the Dutch review – The secret of the ears about OOR Headphone amp and link to Hypsos

Where to buy Ferrum products

Ferrum is sold all over the world. If you have troubles locating our dealer nearby let us help to arrange the brick-and-mortar customer experience for you by contacting us at info@ferrum.audio

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