Warm Audio

Warm Audio WA273 Dual Channel Mic Preamp

3.9 (5 reviews)

Dual-channel '73-style preamp with 80dB of gain, Carnhill transformers, and a fully discrete signal path.

$1,199.00*
In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Warm Audio WA273 is a dual-channel microphone preamp built to capture the essence of the legendary '73-style British preamp designs that have shaped countless classic recordings. At its core is a fully discrete, Carnhill transformer-balanced signal path that imparts the harmonic richness and musical warmth associated with vintage units costing many times more. Each of the two independent channels offers mic, line, and instrument inputs, giving engineers the flexibility to track a wide range of sources — from condenser and ribbon microphones to electric guitars and keyboards — without additional DI boxes or conversion stages.

With 80dB of available gain, the WA273 has more than enough headroom to drive demanding low-output microphones like ribbons and certain dynamic models, eliminating the need for external gain boosters that can introduce noise. The preamp is built with professional-grade components housed in a sturdy metal chassis, and its straightforward control layout — gain knob, input selection, polarity, and phantom power per channel — keeps the workflow fast and intuitive. While it intentionally omits onboard EQ to keep the design focused and the price accessible, the WA273 stands on its own as a high-quality front end for any recording setup.

Key Features

2-channel Mic/Line/Instrument Preamp

Specifications

Brand
Warm Audio
Model
WA273
Type
2-Channel Mic/Line/Instrument Preamp
Channels
2
Gain
80dB
Signal-to-Noise Ratio
80 dB
Signal Path
Fully Discrete, Carnhill Transformer Balanced
Connectivity
XLR
Compatible Devices
PC, Laptop, Audio Interface, Mixing Console
Power Source
Corded Electric
Construction
Alloy Steel, Metal
Dimensions
27.3 x 18.3 x 4.15 inches
Weight
6.5 kg
Color
Black

Pros & Cons

👍 Pros

  • 80dB of gain handles low-output ribbon and dynamic microphones with ease
  • Carnhill transformer-balanced discrete signal path delivers rich harmonic warmth
  • Dual-channel design records two sources simultaneously in a single rack unit
  • Mic, line, and instrument inputs on each channel provide broad source compatibility
  • Delivers classic '73-style tone at a fraction of vintage unit pricing

👎 Cons

  • No built-in EQ, unlike the full '73-style channel strips it draws inspiration from
  • At 27.3 x 18.3 x 4.15 inches it occupies significant rack space
  • No digital output — requires a separate audio interface or converter for recording to a DAW
  • Sound coloration from the transformer design may not suit engineers seeking a transparent, neutral preamp

Frequently Asked Questions

The WA273 is a dual-channel preamp, allowing you to record two independent sources simultaneously — useful for stereo miking, recording two vocalists, or tracking a mic and DI signal at once.
Each channel accepts microphone, line-level, and instrument-level signals, making it versatile for vocals, guitars, keyboards, and other sources.
It uses Carnhill transformers in a fully discrete balanced signal path, which contribute to the warm, harmonically rich character the preamp is known for.
Yes, each channel has independent phantom power for condenser microphones that require 48V.
The WA273 provides up to 80dB of gain, which is enough to drive even low-output ribbon and dynamic microphones without needing an external booster.