Heritage Audio O.H.M. Amp
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Manufacturer Information
Heritage Audio
https://www.heritageaudio.com
info@heritageaudio.com
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Safety manager:
Heritage Audio S.L.
Email: info@heritageaudio.com
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A Heritage Audio Amplifier Designed as a Hi-Fi "Link" in a Studio Workflow
With the O.H.M Amp, Heritage Audio transposes a philosophy derived from its high-end monitoring electronics into a headphone-dedicated format. Notably, it features discrete diamond buffers inspired by designs found in the R.A.M. 2000 and 5000 systems, as well as a fidelity- and low-noise-oriented approach. While many headphone amps merely "turn up the volume," the O.H.M Amp aims for smarter control: it adapts to the headphones to preserve response, dynamics, and the sense of control, regardless of the model used.
Who It's For and Studio or Home Uses
The O.H.M Amp targets producers, sound engineers, and musicians who frequently switch between multiple headphones (closed-back for tracking, open-back for editing and mixing, in-ear for mobile use) and want a coherent listening experience without compromise. Its impedance selector facilitates pairing with demanding headphones while remaining relevant for more accessible models: the goal is to maintain stable reproduction, without bass collapse or harsh treble.
It is also perfectly suited for hi-fi desktop listening by adding a true headphone amplification section to an audio interface, DAC, or console. And if your environment requires wireless, its "professional quality" Bluetooth receiver allows integration of a mobile source while maintaining careful conversion.
Technical specifications
| Number of channels | 2 | Category | headphone preamp |
| Rackable | No | Color | Grey |
Questions frequently asked
Headphone amplifier with impedance adjustment: what is the benefit?
The impedance selector allows adjusting the output impedance to match that of the connected headphones. This adaptation aims to preserve the frequency response and perceived dynamics. It is useful when switching between closed-back, open-back, or in-ear headphones.
What connectivity is available for an audio interface or DAC?
The connectivity includes a balanced input, a gold-plated RCA input, and a Bluetooth receiver. Each input source can be selected independently.
Does the Bluetooth support aptX HD?
The Bluetooth receiver supports aptX, aptX LL, AAC, aptX HD, and SBC codecs, with conversion handled by a Burr Brown DAC.
Can a 3.5 mm jack headphone and a 6.35 mm jack headphone be connected simultaneously?
The two front headphone outputs are in 3.5 mm and 6.35 mm jack formats. The Thru output allows daisy-chaining multiple units or integrating the Bluetooth receiver into an existing setup.
What power supply does this headphone amplifier have?
The 30 V external power supply is designed for low noise and an appropriate power reserve. Volume control relies on an Alps Blue Velvet potentiometer, combined with discrete diamond buffers and Burr Brown operational amplifiers.
