Ferrum Audio – OOR – Headphone amplifier

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. Ferrum use what Ferrum dubbed Ferrum’s 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 analogue 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 centre positive, proprietary 4-pin DC connector
• Outputs: Balanced 4-pin XLR, 6.35 mm jack
• 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 + Noise: TBA
• 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