Ferrum Audio OOR Headphone Amplifier
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Ferrum Audio experienced a significant milestone in 2021 when its HYPSOS won an EISA award, affirming that the company was on the right path to delivering exceptional audio equipment. This success inspired Ferrum Audio to pursue their vision of creating the best possible audio gear. In 2022-2023, their aspirations were fully realized when OOR was selected by the esteemed EISA members as the best Headphone Amplifier. Like HYPSOS, OOR is a groundbreaking design born from an in-depth exploration of pure analogue audio. It combines understated aesthetics with advanced power delivery and amplification technologies to achieve ultra-low distortion, immense dynamics, and unmatched detail. For those seeking to unlock even greater musicality, OOR is engineered to pair seamlessly with the HYPSOS Hybrid Power System.
OOR is set to revolutionize the headphone amplifier category. It effortlessly drives any headphones to their maximum potential while preserving the integrity of the music. Offering ultra-low distortion, zero fatigue, extensive dynamics, and unparalleled detail, OOR provides the ultimate listening experience. It accomplishes what is typically challenging, making it seem effortless.
Truly Balanced
The signal path stays truly balanced using the XLR inputs and becomes truly balanced using the RCA inputs.
Ease of use
Only three knobs on the front panel to control the most important settings.
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.
Superior control
Ferrum Audio has perfected steering of output transistors in order to 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.
Enhanced transparency
The whole design is focussed on a balanced and very transparent sound signature, making listening fatigue something of the past.
Discrete design
The discrete power amp technology is developed in-house to achieve the best possible analog quality.
- Gain (dB):balanced -4 dB, + 6dB, +16 dB / single ended -10 dB, 0 dB, 10 dB
- Operation: Fully balanced, proprietary discrete power amp technology
- Inputs: XLR, RCA, 2.5 mm DC connector center positive, proprietary 4-pin DC connector
- Headphone outputs: Balanced 4-pin XLR, 6.35 mm jack
- Balanced input voltage: max 19 VRMS, recommended 3-12 VRMS
- Unbalanced input voltage: max 9.5 VRMS, recommended 1.5-6 VRMS
- Frequency Response: 20 Hz – 100 kHz 0.1 dB
- Output Power Single Ended: 400 mW into 300 Ω, 2 W into 60 Ω
- Output Power Balanced: 1.600 mW into 300 Ω, 8 W into 60 Ω
- THD on balanced output: 0.00011% / -119 dB, 1 mW into 50 Ω; 0.00028% / -111 dB, 100 mW into 50 Ω
- THD on unbalanced output: 0.00008% / -122 dB, 1 mW into 50 Ω; 0.00028% / -111 dB, 100 mW into 50 Ω
- Dynamic range: 130 dB (A-weighted)
- Input Impedance: 94 kΩ
- Output Impedance Single Ended: 22 Ω on pre-amp
- Output Impedance Balanced: 44 Ω on pre-amp
- Output headphones Impedance: < 0.3 Ω
- Power Consumption: Idle <15 W
- Power Adapter: 100/240 V AC to 22-30 V DC
- Dimension (W x D x H) (In/cm): 8.6 x 8.1 x 2.0 inch / 21.7 x 20.6 x 5 cm
- Weight (kg/lbs): 1.8 kg / 3.97 LBS
- Price: 1.995 EUR/USD
