Ferrum Oor

Oor was too fun for Soundnews who put Ferrum's upstart against the industry's top dogs. Even Hi-Fi-centric Part-Time Audiophile awarded it an Editors Choice, and Hi-Fi News an Outstanding Product award complete with measurements. 

In Oor is the complete package. Ferrum managed to balance the demand for neutrality in a flagship source, with the deep, impactful bass of a DC-coupled design.

The technical chops are on show throughout by the proudly Polish HEM, who built Mytek but know a thing or two about circuit design themselves. 

Oor's business side of things – a power stage consisting of a discrete transistor op-amp designed from the ground up – remains inherently linear. Even before negative feedback is applied. 

Excellent frequency response in the open-loop, without coupling capacitors in the signal path, allows excellent low-frequency performance guaranteeing tight bass.

And high-frequency extension soars to 60Khz, before negative feedback took that out flat to 100Khz. Phase response in the human hearing range is stellar, for potent, precise and hard-hitting dynamics to show off your flagship headphones.

READ ALSO The inside story designing Ferrum Oor

Feedback is not of the ordinary variety either, with current feedback providing speed of the loop gain through the capacitance of solid-state transistors for low transient intermodulation and slew-induced distortion. 

Ferrum make their good Oor great, meanwhile, biasing the transistors making up their proprietary power stage in novel manner.

Sitting between a sliding bias Class A and high-bias Class AB output stage in definition, Oor achieves the best benefits of both – highly linear transistor operation, plus high efficiency and lower quiescent current and heat.

Thus is 8 watts of power delivered into HIFIMAN's Susvara achieved. Oor gives you power in quantity as well as quality. Certainly the same thing can be said about the listener's level of enjoyment too, regardless of headphone.

Take Oor up another notch with the addition of the HYPSOS power supply, browse all of Ferrum's products here, or view our other desktop devices here.