Warm Audio WA73 Single-Channel 1073 Style Microphone Preamplifier

SKU: WA73 MFR: WA73
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Key Features

  • Capture pristine audio with this single-channel microphone preamplifier, perfect for studio recordings.
  • Experience the classic 1073 sound; this preamp enhances vocals and instruments with warmth and clarity.
  • Enjoy versatile connectivity with XLR and 1/4" inputs, ideal for various microphones and instruments.
  • Achieve optimal gain staging with the WA73's wide gain range, ensuring low noise in every recording.
  • Rely on robust build quality; this 19" rackmount preamp is designed for years of reliable studio use.
  • Utilize phantom power for condenser mics & polarity switch for phase issues, optimizing your recording setup.
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Special Order?Estimated to Ship: 09/08/2025
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Warm Audio WA73 Specifications

  • Number of Channel

    1

  • Fully discrete

    Yes

  • Phantom power

    48V

  • Polarity switch

    Yes

  • Power

    Internal IEC 115v/230v power inlet

  • LED level indication

    Yes

  • Width

    19" (48.26cm)

  • UPC Code

    713541493155

About Warm Audio WA73

Let the WA73 Single-Channel 1073 Style Microphone Preamplifier transport you back to the golden age of pop and rock. This '73-style preamp, revered by professional engineers worldwide, has been the backbone of countless iconic records over the decades. The WA73 is part of the Warm Audio "WA73 Family," a collection of single and dual-channel '73-style preamps, meticulously crafted to honor the rich British audio history.

The unique tone and character of vintage '73-style mic preamps are so distinctive and beloved that our mission at Warm Audio was to create a sonically accurate reproduction. After years of intensive research and development, reverse-engineering, and countless hours of auditioning, we proudly present the WA73.

This boutique preamp is not only a "Desert Island" essential but also a versatile studio and live workhorse. It shines with all types of microphones - from Condenser to Dynamic to Ribbon - and excels with a wide range of sources, including vocals, acoustic/electric guitars, bass, drums, percussion, orchestras, and keyboards. You can even use it as a tone-shaping tool to run partial or complete mixes through.

With 80dB of gain and a fully discrete Carnhill Transformer balanced signal path, the WA73 is equipped to handle any recording, mixing, or engineering task. Like the classic '73-style preamps, the WA73 is hand-wired and hand-assembled, including the PCB components, which are all populated by hand. This meticulous construction contributes to the sought-after classic British tone.

We've partnered with Carnhill Transformers of Cambridgeshire, UK, to design faithful reproductions of the most coveted early version transformers. These transformers are known for their fluid and forgiving nature, saturating sweetly when pushed, and delivering mixes that are nothing short of beautiful.

The WA73 also maintains the integrity of early British designs by using tantalum and polystyrene capacitors in the signal path and an output transistor choice that is much smoother in high gain settings than what is typically found in modern '73-style preamps. Experience the sweet, musical sound of our WA73, and you'll understand why it's a modern-day tribute to the revered '73-style preamp.

Warm Audio WA73 Features

  • Single Channel, Class A, '73-style British Microphone Preamp
  • UK made Carnhill Transformers
  • Hand wired, hand assembled
  • 80dB of gain - resistor stepped gain switch
  • Fully discrete
  • TONE button - Changes input transformer impedance for varying tone
  • Polarity switch
  • 48v phantom power
  • 4 position inductor based hipass filter - 50, 80, 160, 300 Hz
  • XLR mic input
  • Line level TRS input
  • TS Send/Receive insert jacks
  • XLR & TRS line level outputs
  • Direct In, instrument input
  • Output control
  • LED level indication
  • 19" rackable
  • Ground lift switch
  • Internal IEC 115v/230v power inlet

Product Documents

User Manual

Key Features

  • Capture pristine audio with this single-channel microphone preamplifier, perfect for studio recordings.
  • Experience the classic 1073 sound; this preamp enhances vocals and instruments with warmth and clarity.
  • Enjoy versatile connectivity with XLR and 1/4" inputs, ideal for various microphones and instruments.
  • Achieve optimal gain staging with the WA73's wide gain range, ensuring low noise in every recording.
  • Rely on robust build quality; this 19" rackmount preamp is designed for years of reliable studio use.
  • Utilize phantom power for condenser mics & polarity switch for phase issues, optimizing your recording setup.