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About this gear
OOR is Ferrum's dedicated headphone amplifier, built around a Class A output stage that prioritizes drive and control over a wide range of headphone impedances and sensitivities. It's designed to pair with Ferrum's WANDLA DAC and HYPSOS power supply as a modular stack, appealing to enthusiasts chasing an authoritative, low-noise amplification stage for demanding planar and dynamic headphones alike.
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