Heritage Audio Launches the World’s First Impedance-Matching Headphone Amplifier

Heritage Audio has unveiled the O.H.M Amp, the world’s first impedance-matching headphone amplifier designed to elevate audio performance for both studios and audiophiles.

Officially launched on January 16, 2025, this groundbreaking device bridges the gap between high-quality sound and adaptability, bringing out the full potential of any headphones, regardless of price or type.

At a Glance

  • First of its Kind: The O.H.M Amp matches headphone impedance for unparalleled performance, a feature that’s never been done before.
  • Versatile Inputs: With options like balanced XLR, unbalanced RCA, and high-fidelity Bluetooth, it’s designed for any audio setup.
  • Top-Tier Engineering: From Burr Brown op-amps to a custom 30V power supply, every component promises pristine audio quality.

Why the O.H.M Amp Stands Out

Unmatched Compatibility for All Headphones

The O.H.M Amp redefines flexibility with its ability to match output impedance to any set of headphones, ensuring optimal performance. Whether you’re using budget-friendly earbuds or premium audiophile headphones, this feature allows users to achieve studio-grade audio precision. The impedance selector on the front panel makes fine-tuning straightforward, ensuring sound quality isn’t left to chance.

Adding to its appeal, the device includes two independent headphone jacks—6.35mm and 3.5mm—eliminating the need for adapters. Audiophiles and studio professionals alike will appreciate this thoughtful design, which enhances convenience and reduces noise interference.

Exceptional Input Options and Features

The O.H.M Amp offers three premium input options:

  1. Balanced XLR/1/4″ Combo Jack for studio setups.
  2. Gold-Plated RCA for unbalanced audio sources.
  3. Bluetooth Connectivity powered by Burr Brown’s DAC, supporting aptX®, aptX HD®, AAC, and SBC codecs for wireless high-fidelity sound.

Switching between input sources is as simple as pressing a button on the front panel. Users can also chain multiple units using the built-in THRU outputs, making it versatile enough for both standalone and multi-unit configurations. The Bluetooth functionality also doubles as a premium receiver for streaming audio.


Audiophile-Grade Performance and Design

Borrowing technology from its acclaimed R.A.M System 2000 and R.A.M System 5000, Heritage Audio has equipped the O.H.M Amp with discrete diamond buffers and Burr Brown op-amps. These components deliver superior fidelity and ultra-low noise, resulting in crystal-clear sound.

The output level is controlled by an Alps “Blue Velvet” potentiometer, a feature known for precision and durability. This small but crucial detail underscores Heritage Audio’s commitment to quality.

Powering this innovation is a high-voltage, low-noise 30V external power supply. It ensures consistent performance across all impedance levels, providing a robust dynamic range and ultra-low harmonic distortion. With its rubber feet for tabletop use and a drilled 5/8” hole for mounting on microphone stands, the O.H.M Amp is as portable as it is powerful.


Who Is the O.H.M Amp For?

The O.H.M Amp caters to a diverse audience. Studio engineers will love its ability to adapt to any headphones in professional settings, while audiophiles will appreciate the device’s meticulous attention to audio detail. Whether for critical listening or casual enjoyment, this amplifier ensures the best possible sound quality.

Heritage Audio’s O.H.M Amp is available now through its global dealer network. The MSRP is €549.00 (including VAT) in the EU and $499.00 USD in the U.S. For more information, visit Heritage Audio’s O.H.M Amp webpage

The Heritage Audio O.H.M Amp represents a significant leap in audio innovation, combining precision engineering with user-centric design. By introducing impedance matching and versatile input options, it sets a new benchmark for headphone amplifiers in studios and home setups alike. Whether you’re a professional or an enthusiast, the O.H.M Amp promises to transform the way you experience sound.

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