Ferrum Audio OOR

Introduction to the Ferrum Audio OOR

The Ferrum Audio OOR is an uncompromising high-fidelity headphone preamplifier, ideal for jazz, blues, and classical music enthusiasts. It is Ferrum’s first fully analog and balanced amplifier, featuring a discrete power supply, ensuring exceptional resolution and transparency, allowing the listener to perceive every musical detail with organic clarity.

Audio Quality

It is capable of driving any headphone to their maximum potential, offering ultra-low distortion, enormous dynamics, and unmatched detail. It delivers impressive power, capable of outputting up to 10 W per channel at 32 Ohms, 8 W at 60 Ω, and up to 1.6 W at 300 Ohms. This means the OOR can drive virtually any headphone, offering exceptional flexibility and versatility.

Technical Specifications

It features XLR and RCA inputs, a 2.5 mm center-positive DC connector, and a proprietary 4-pin DC connector. It offers ultra-low distortion, enormous dynamics, and unmatched detail, resulting in the ultimate listening pleasure.

Value for Money

While it represents a significant investment, it is considered affordable for a high-end device and competes with more expensive amplifiers. Adding the HYPSOS power supply via the exclusive Ferrum Power Link (FPL) cable further enhances its performance, making the OOR a wise choice for discerning audiophiles.

Benefits of the Ferrum Audio OOR

• Transparent and detailed sound quality
• Modern design and high-end finish
• Compatibility with a wide range of devices
• Intuitive use and easy integration
• Advantageous price-performance ratio for a high-end device
• Performance enhancement with the HYPSOS power supply

Technical Specifications

General Description

• Fully balanced analog headphone amplifier
• Exclusive discrete amplification technology

Audio Performance

• Frequency response: 20 Hz - 100 kHz ± 0.1 dB
• Volume control: analog potentiometer with bypass function

Gain and Power

• Balanced gain: -4 dB, +6 dB, +16 dB
• Unbalanced gain: -10 dB, 0 dB, +10 dB
• Balanced output power: 1,600 mW at 300 Ω, 8 W at 60 Ω
• Unbalanced output power: 400 mW at 300 Ω, 2 W at 60 Ω

Impedances

• Input impedance: 94 kΩ
• Headphone output impedance: < 0.3 Ω
• Balanced preamplifier output impedance: 44 Ω
• Unbalanced preamplifier output impedance: 22 Ω

Connectivity

Inputs

• 1 × unbalanced stereo RCA
• 1 × balanced stereo XLR

Outputs

• 1 × balanced XLR headphone output
• 1 × unbalanced 6.35 mm TRS jack headphone output
• 1 × balanced XLR line output
• 1 × unbalanced RCA line output

Physical Characteristics

• Dimensions: 21.7 × 20.6 × 5 cm
• Weight: 1.8 kg
• Power supply: 22-30 V DC via 5.5/2.5 mm DC connector or proprietary 4-pin FPL cable
• Power consumption: < 15 W

Box Contents

• 1 × Ferrum OOR headphone amplifier
• 1 × power cable
• 1 × AC/DC power adapter