Ferrum OOR Balanced Headphone Amplifier

OOR redefines the category of headphone amplifiers. OOR will drive any headphones effortlessly to the max of their potential, while preserving the essence of the music it amplifies. Ultra low distortion, zero fatigue, huge dynamics and unrivaled detail result in ultimate enjoyment. OOR actually makes something that is very difficult to accomplish, seem like the most natural thing on earth. Awarded Analog Amp When our HYPSOS won an EISA award in 2021, we knew we were on the right track and went on to follow our dreams of delivering the best possible audio gear we could think of. When we learned OOR was chosen by the honorable EISA members as best Headphone Amplifier of 2022-2023, all our dreams came true. As did HYPSOS, OOR is a ground-up design without precedent, created from a profound exploration of analogue audio in its purest form. Understated looks married with sophisticated power delivery and amplifier technologies, delivering ultra-low distortion, huge dynamics and unrivaled detail. For those who want to go even further in unleashing unheard musicality, OOR is, of course, designed to pair perfectly with the HYPSOS Hybrid Power System. Truly Balanced The signal path stays truly balanced using the XLR inputs and becomes truly balanced using the RCA inputs. Ferrum Power Link OOR performs very, very good right out of the box. But OOR is made to excel above and beyond when used together with HYPSOS. We use what we dubbed our Ferrum Power Link (FPL in short) to connect the two. HYPSOS then will perform to its maximum, unleashing unheard musicality from the combination with OOR. Enhanced Transparency The whole design is focussed on a balanced and very transparent sound signature, making listening fatigue something of the past. Ease of Use Only three knobs on the front panel to control the most important settings. Superior Control Perfected steering of output transistors protect them and never let them turn off, therefore reducing distortion to inaudible levels and keeping them in a state where they can instantly unleash all their power, crucial for high dynamics, superlative control and authority in sound. Discrete Design The discrete power amp technology is developed in-house to achieve the best possible analog quality. Unique Output Cable Design Two wires delivering the power and two wires providing the feedback to ensure flat voltage at every moment. We named this technique Ferrum Power Link (FPL) and it eliminates the harmful effects of the cable's resistance effectively improving transient response. The current delivery speed at the powered device's input is significantly improved. Select Power OOR comes with a carefully selected DC power adapter. To get the most out of OOR you can connect it with HYPSOS using our proprietary Ferrum Power Link DC power cable. This FPL cable can be ordered separately. Features Gain Balanced -4 dB, + 6dB, +16 dB / Single Ended -10 dB, 0 dB, 10 dB Inputs XLR, RCA, 2.5 mm DC connector centre positive, proprietary 4-pin DC connector Outputs Balanced 4-pin XLR, 6.35 mm jack Frequency Response 0 Hz – 100 kHz 0.1 dB Output Power Single Ended | Balanced 400 mW into 300 Ω, 2 W into 60 Ω | 1.600 mW into 300 Ω, 8 W into 60 Ω THD Single Ended | Balanced 0.00011% / -119 dB, 1 mW into 50 Ω; 0.00028% / -111 dB, 100 mW into 50 Ω | .00008% / -122 dB, 1 mW into 50 Ω; 0.00028% / -111 dB, 100 mW into 50 Ω Dynamic Range 130 dB (A-weighted) Specs (Continued) Input Impedance 94 kΩ Output Headphones Impedance < 0.3 Ω Power Consumption Idle <15 W Power Adapter 100/240 V AC to 22-30 V DC Dimensions 21.7 cm x 20.6 cm x 5 cm Weight 1.8kg