Heritage Audio O.H.M. Amp

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Heritage Audio O.H.M. Amp

Heritage Audio

O.H.M. Amp

4.4 Expert Rating

Product Info

Article Number: 608911
Model: O.H.M. Amp
Price: $603.90

* Prices may vary. Check retailer for current pricing and availability.

The O.H.M. Amp is a serious piece of kit for the discerning audiophile. It’s designed to really shine with high-end headphones, providing a level of detail and dynamic range you won't find in typical headphone setups. If you're serious about your listening experience and want to unlock the full potential of your headphones, this amp is worth a close look.

Product Description

  • Heritage Audio O.H.M. Amp
  • Headphone Amplifier
  • With dynamic output impedance matching to headphones
  • Output impedance: LOW
  • 600 ohm
  • Balanced
  • unbalanced or Bluetooth inputs can be selected independently of each other
  • Audiophile Alps ‘Blue Velvet’ potentiometer
  • Discrete Diamond buffer
  • Burr Brown operational amplifiers
  • Bluetooth receiver: Codecs APTX
  • APTX LL
  • APTX HD
  • SBC as well as Burr Brown DAC
  • Thru output for connecting several O.H.M. amplifiers in series
  • 30 V power supply for exceptional dynamic range
  • Signal-to-noise ratio and extremely low harmonic distortion at any impedance
  • Two line inputs RCA unbalanced
  • Two line inputs XLR / 6.3 mm jack combo balanced
  • Two stereo headphone outputs 6.3 mm jack balanced and 3.5 mm mini jack
  • Dimensions (W x H x D): 170 x 50 x 150 mm
  • Includes external power supply (30 V DC
  • 0.4 A)
  • Weight: 888 g
PROS
  • • Audiophile Alps pot offers smooth, precise volume control.
  • • Discrete Diamond buffer delivers exceptional transient response.
  • • Burr Brown DAC ensures clean, detailed audio reproduction.
  • • Flexible impedance matching optimizes headphone performance across ranges.
CONS
  • • Size (17...) is substantial; not ideal for cramped setups.
  • • Premium-priced, a significant investment for casual listeners.
  • • Bluetooth codec support, while extensive, might not be crucial for all.

Product Video

Key Features

Channels 2
Power 30V
Impedance Range 32-600 ohms
Connections RCA, XLR/6.3mm, 3.5mm, Bluetooth
Weight Approximately 4.5 lbs (estimated)

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Frequently Asked Questions

It adjusts the output to best suit your headphones' impedance, preventing distortion and maximizing volume while preserving tonal accuracy.
It's a convenience feature, but the inclusion of codecs like APTX HD means you *can* get decent quality wireless listening, though wired is always preferable.
The O.H.M. Amp’s discrete design and Burr Brown op-amps result in a notably low noise floor, often surpassing competitors at this level.

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