The Ferrum OOR is a flagship discrete analogue headphone amplifier designed to deliver ultra-low distortion, exceptional dynamics, and fatigue-free detail. Engineered around a fully balanced signal path for both XLR and RCA inputs, OOR features an in-house developed discrete power amp design with advanced transistor control that keeps output transistors active at all times to eliminate crossover distortion. With intuitive controls via three front-panel knobs, it offers effortless driving power and authority for virtually any headphone model. While providing outstanding performance on its own, OOR is equipped with the proprietary Ferrum Power Link (FPL) to pair seamlessly with the HYPSOS Hybrid Power System for maximum musicality and elevated audio performance.
| Frequency response | 20 Hz – 100 kHz ±0,1 dB |
|---|---|
| Input impedance | 94 kΩ |
| Power consumption | V nečinnosti (Idle) < 15 W |
| Weight | 1,8 kg (3,97 lbs) |
| Inputs | XLR, RCA, 2,5 mm DC konektor (kladný stred), vlastný 4-pinový DC konektor |
| Dynamic range | 130 dB (vážený A) |
| Headphone Output | Symetrický 4-pinový XLR, 6,35 mm jack |
| Output power (balanced) | 1 600 mW @ 300 Ω, 8 W @ 60 Ω |
| Dimensions (W × H × D) | 21,7 cm × 20,6 cm × 5,0 cm (8,6" × 8,1" × 2,0") |
| Output Impedance (Single-Ended) | 44 Ω (predzosilňovač) |
| Output Impedance (Headphones) | < 0,3 Ω |
| Power Adapter | 100 – 240 V AC na 22 – 30 V DC |
The Ferrum Audio brand is an exceptionally successful Polish pioneer in the field of headphone audio and premium power supplies. It was founded in early 2020 under the umbrella of its parent company, HEM, in the Warsaw region, which is historically known for iron mining and a rich tradition of precision craftsmanship. Frédéric Chopin himself hailed from the same region, and Ferrum aims to bring the art of music and emotion to the whole world. The brand name refers to the Latin term for iron, symbolising the durability, uncompromising resilience and technical robustness of its design solutions.
Ferrum Audio combines decades of research with local manufacturing and a clear philosophy: to deliver the ultimate audiophile experience in compact and stylish devices offering exceptional value for money. The brand made a name for itself with its very first product – a hybrid power supply that redefined the possibilities for powering audio components. This was followed by fully balanced headphone amplifiers and D/A converters with headphone outputs, which quickly established themselves amongst the world’s best. Ferrum products are capable of extracting the absolute maximum from headphones – with an extremely transparent soundstage, great dynamics, ultra-low distortion and a level of detail that breathes new life into the music.
Manufacturer information (GPSR)
Manufacturer
HEM Sp. z o.o.
Al. Jerozolimskie 475 05-800 Pruszków Poland
+48 22 823 72 38