26. November 2025 | News | Noizefield

Audio Hertz Launches AM.pre Plugin for Authentic Tube Sound

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Audio Hertz has introduced AM.pre, a new audio plugin designed to emulate the sound of the iconic Ampex 351 tube preamp. This plugin is available in VST3, AU, and AAX formats for both macOS and Windows, and aims to capture the essence of its hardware counterpart, which has been a staple in countless classic studios and recordings.

Capturing the Classic Sound
Known for its warm saturation and rich tube character, the Ampex 351 preamp has been a go-to choice for engineers since the 1950s. Its unique build, which features high-voltage tube stages and large transformers, is renowned for delivering harmonic richness that many still aspire to achieve in their recordings. AM.pre translates this rich sound into a digital format, promising to provide the same sweetness, body, and musical saturation that the original hardware is famous for.

When utilizing AM.pre, users can expect a plugin that enhances any audio signal with warmth and character. When pushed beyond its limits, it offers a smooth tube saturation that remains musical, offering a soft touch even at higher levels.

Efficient Design for Ease of Use
Designed with a simple and fast workflow, AM.pre focuses on delivering analog color to mixed tracks without unnecessary complexity. There are no hidden controls or complicated menus; in fact, users are encouraged to simply turn it up and experience the transformation of their audio.

Key Features

  • 351 Tube Preamp Model – Faithful emulation of the iconic Ampex 351 amplifier stage.
  • Sweet Tube Harmonics – From gentle warmth to rich, musical breakup.
  • Mix-Ready Tone – Smooth top end, thick low-end, and natural glue on any source.
  • Dynamic Gain Staging – Responds like real hardware for authentic feel and tone.
  • Simple Workflow – Fast, intuitive control with zero menus or hidden settings.
  • Auto Gain – Maintains consistent output level while adjusting gain.

Pricing & Availability
AM.pre is currently available at an introductory price of $19, down from the regular price of $39, making it an accessible option for those looking to enhance their audio production with some vintage flavor.

 


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