Ferrum's OOR is a high quality balanced headphone amplifier and preamplifier, capable of accompanying all types of headphones, including the most demanding, while preserving the essence of your music. With very low distortion, impressive dynamics and an incredible level of detail, the OOR is the ultimate companion for headphone listening.

• True Balanced : The signal circuit, balanced from end to end, allows to reach an excellent quality of sound restitution.
• Ferrum Power Link : While the OOR offers excellent basic performance, it can also be combined with the Ferrum Hypsos power supply (sold separately) using Ferrum Power Link (FPL) technology for optimal performance and musicality.
• Improved transparency : The entire architecture of the OOR focuses on its ability to deliver transparent and detailed sound.
• User friendly : Practical and intuitive, the OOR has just three buttons to control all the parameters of the device.
• Total control : The optimized integration of the output transistors protects them and never lets them turn off, reducing distortion to inaudible levels and keeping them in a state where they can instantly unleash their full power, crucial for high dynamics, superior control and good sounding power.
• Discrete design : The discrete amplifier circuit has been specifically developed by the brand to obtain the best possible analog quality.