Ferrum OOR Headphone Amplifier PREAMP

The Ferrum Audio OOR Headphone Amplifier is engineered for audiophiles who demand uncompromising sound quality, precision, and power. Built on proprietary discrete amplifier technology, OOR delivers ultra low distortion, massive dynamics, and exceptional detail, making it a true reference level headphone amplifier and preamp.

Designed to reveal every nuance in your music, OOR transforms your listening experience into something truly immersive and natural.

Features

• OOR fully Balanced analogue headphone amplifier
• Proprietary discrete power amp technology
• Balanced 4-pin XLR and unbalanced RCA headphone outputs
• Delivers up to 8W into 60Ω balanced, 2W into 60Ω single-ended
• Ultra-low distortion
• Zero fatigue
• Huge dynamics
• Unrivalled detail
• Proprietary 4-pin Ferrum connector for HYPSOS

Fully Balanced Design for Pure Signal Integrity

OOR maintains a fully balanced signal path, ensuring maximum transparency and minimal interference. Whether using XLR or RCA inputs, the design preserves audio integrity for a clean and natural sound signature.

Massive Power with Absolute Control

With up to 8 watts of balanced output power, OOR effortlessly drives even the most demanding headphones. It delivers strong authority across all frequencies, from deep controlled bass to airy detailed highs.

Proprietary Discrete Amplifier Technology

Ferrum’s in house discrete amplifier design ensures exceptional analogue performance. The output stage is carefully controlled to remain active at all times, reducing distortion and delivering instant power when needed.

Ultra Low Distortion with Zero Fatigue

The advanced circuitry minimizes distortion to inaudible levels. This results in a smooth, natural listening experience that remains engaging even during long sessions without causing fatigue.

Designed for Perfect Synergy with HYPSOS

OOR is optimized to pair with the Ferrum HYPSOS Hybrid Power System using Ferrum Power Link. This combination enhances power delivery, improves dynamics, and elevates overall sound performance.

Simple and Intuitive Operation

With a clean front panel and three control knobs, OOR offers easy control over essential functions while maintaining a minimalist, elegant design.

Technical Highlights

• Balanced output power up to 8W at 60 ohms
• Single ended output power up to 2W at 60 ohms
• Fully balanced signal path design
• Ultra low distortion performance
• High dynamic range and precise control

What is Included

• Ferrum OOR headphone amplifier
• Mains power cable
• Documentation

Who This Is For

• Audiophiles seeking reference level headphone amplification
• Users with high impedance or power demanding headphones
• Music professionals and critical listeners
• Anyone upgrading to a high end analogue amplifier

Experience Music with Authority and Precision

The Ferrum OOR Headphone Amplifier delivers unmatched control, clarity, and musicality. With its powerful balanced design and ultra clean analogue performance, it unlocks the full potential of your headphones and brings your music to life like never before.