The Heritage Audio O.H.M (Output Headphone Matching) is an advanced headphone amplifier designed for studio professionals and audiophiles, featuring impedance matching, multiple input sources—including balanced, unbalanced gold-plated RCA, and high-quality Bluetooth with Burr Brown DAC—discrete diamond buffers, audiophile-grade Alps potentiometer, and an external high-voltage power supply to deliver unparalleled sound quality and adaptability.

Engineered for Maximum Headphone Performance

The O.H.M Amp sets itself apart by offering the industry’s first-ever impedance headphone matching amplifier. This feature allows users to fine-tune the amplifier's output impedance to align perfectly with the specific requirements of their headphones. This precision ensures optimal performance, whether the user connects low-impedance earbuds or high-end audiophile-grade headphones.

Versatile Connectivity for Any Setup

Heritage Audio has equipped the O.H.M Amp with three independently selectable input sources to cater to diverse professional and personal needs. These include a balanced input for studio-grade connections, a gold-plated unbalanced RCA input for pristine signal integrity, and a professional Bluetooth receiver. The Bluetooth receiver supports advanced codecs such as APTX, APTX LL, AAC, APTX HD, and SBC, ensuring high-fidelity wireless audio. The addition of a Burr Brown DAC enhances clarity, offering a premium audio experience over wireless connections.

Precision Output and Connection Options

The O.H.M Amp provides two independent headphone outputs—6.35 mm (1/4”) and 3.5 mm (1/8”)—eliminating the need for adapters and reducing the risk of noise interference. This design prioritises convenience and reliability, enabling seamless transitions between different headphone types.

Cutting-Edge Technology for Audiophile-Grade Sound

The amplifier incorporates discrete diamond buffers, a hallmark of Heritage Audio’s renowned R.A.M System models, and Burr Brown operational amplifiers for exceptional fidelity and ultra-low noise performance. Together, these components guarantee a highly accurate and detailed audio response, suitable for critical listening environments.

Unmatched Control and Scalability

The O.H.M Amp features an Alps "Blue Velvet" potentiometer, a sought-after component in audiophile circles, for precise output level control. The pass-through output allows users to daisy-chain multiple units, providing flexibility for larger setups or enabling the device to function as a standalone high-grade Bluetooth receiver.

Power and Precision Redefined

Heritage Audio has included an external 30V high-voltage, low-noise power supply to ensure powerful performance at any impedance level. This tailored power source maximises dynamic range, improves the signal-to-noise ratio, and minimises harmonic distortion, delivering exceptional audio quality regardless of headphone specifications.

Designed for Practical Use

The O.H.M Amp features rubber feet for stable tabletop use and a drilled 5/8” hole on its underside for secure mounting on any microphone stand. This versatility makes it suitable for a range of professional and personal setups, from recording studios to listening rooms.

The Heritage Audio O.H.M is an all-encompassing solution for audiophiles and professionals seeking to unlock the full potential of their headphones. By combining cutting-edge impedance matching, flexible connectivity, and precision engineering, it sets a new standard for headphone amplifiers, delivering an unparalleled listening experience.