# WA273 Dual Channel British Mic Pre Warm Audio Tech/Pro Audio Gear

# Warm Audio WA273 Dual-Channel British-Style Microphone Preamp

**Two channels of rich analog gain for vocals, instruments, drums, ribbons and professional studio recording.**

The Warm Audio WA273 is a professional **dual-channel microphone preamplifier** designed for recording engineers, producers, musicians and studios looking for the warm, full character associated with classic British console-style preamps.

With **two independent channels, up to 80 dB of gain, a fully discrete signal path, Carnhill transformers, microphone/line/instrument connectivity, high-pass filtering, switchable input impedance and insert points**, the WA273 can become a powerful front end for microphones and instruments before they reach your audio interface or recording system.

Use it for vocals.

Record a stereo pair of microphones.

Capture drums.

Track electric guitar.

Give a ribbon microphone substantial gain.

Or drive the preamp harder to introduce additional transformer and analog character.

## How Does the Warm Audio WA273 Work?

A microphone produces a relatively low-level electrical signal.

Before that signal can be properly recorded, it typically needs to be amplified to a stronger line-level signal.

That's the job of a microphone preamp.

Connect your microphone to the WA273.

The WA273 amplifies the microphone signal through its analog circuitry.

The resulting line-level signal can then be sent to an audio interface, converter, recorder or additional compatible outboard equipment.

Because the WA273 uses a transformer-balanced, discrete analog architecture, the preamp isn't simply about making the signal louder—it can also contribute tonal character to the recording.

## Two Independent Preamp Channels

The WA273 provides **two channels of microphone preamplification** in one rackmount unit.

That makes it useful for recording two sources simultaneously or working with stereo microphone configurations.

Examples include:

-   Stereo drum overheads
    
-   Piano
    
-   Acoustic guitar
    
-   Guitar cabinets
    
-   Percussion
    
-   String ensembles
    
-   Room microphones
    
-   Two vocalists
    
-   Dual-microphone instrument setups
    

For studios, two channels also mean two microphones can benefit from the same general preamp architecture during a session.

## Up to 80 dB of Gain

The WA273 provides up to **80 dB of gain**, giving engineers substantial amplification for a wide variety of microphone types.

That can be particularly useful with lower-output microphones, including many passive ribbon and dynamic microphones.

Rather than requiring an additional inline gain device in every situation, the WA273 provides a substantial amount of gain directly from the preamp.

## Carnhill Transformer-Balanced Signal Path

A defining part of the WA273 architecture is its use of **Carnhill transformers** within the signal path.

Transformers are an important part of the character associated with this style of analog preamplifier.

Depending on the source, microphone and gain structure, the WA273 can provide everything from relatively open amplification to more noticeable analog color and harmonic character.

This gives engineers the ability to think of the preamp as part of the sound—not merely a utility between the microphone and converter.

## Clean It Up or Drive It Harder

One of the creative advantages of analog preamplification is gain staging.

For a cleaner recording, configure the input and output levels appropriately to maintain greater headroom.

Want additional character?

Drive the input stage harder and compensate with the output level.

This allows engineers to explore different amounts of analog coloration without necessarily changing microphones.

That can be especially useful on vocals, drums, bass and electric guitar.

## Microphone, Line & Instrument Inputs

The WA273 isn't limited to microphones.

Its connectivity supports **microphone, line-level and instrument-level sources**, allowing the preamp to handle a broad range of recording applications.

### Microphones

Connect compatible condenser, dynamic and ribbon microphones.

### Line-Level Equipment

Process compatible line-level sources through the analog preamp architecture.

### Instruments

Connect instruments such as electric guitar or bass through the front-panel instrument input.

This makes the WA273 useful throughout a recording session instead of limiting it to one type of source.

## Excellent for Vocals

Vocals are one of the most natural applications for a high-quality analog microphone preamp.

Pair the WA273 with an appropriate microphone and use its gain architecture to create anything from a relatively natural vocal recording to a richer, more colored sound.

For productions where the vocal needs to feel substantial and present before plugins are added, the preamp can become an important part of the recording chain.

## Powerful Choice for Ribbon Microphones

Ribbon microphones can have relatively low output and may require significant clean gain.

With up to **80 dB available**, the WA273 is well suited to many ribbon-microphone recording applications.

The switchable input-impedance functionality can also provide another way to explore the interaction between the microphone and preamp.

This makes the WA273 particularly interesting for ribbon microphones used on:

-   Guitar cabinets
    
-   Drum overheads
    
-   Horns
    
-   Strings
    
-   Room microphones
    
-   Acoustic instruments
    

## Switchable Tone / Input Impedance

Warm Audio's **Tone control** changes the input transformer impedance between approximately **1200 ohms and 300 ohms**.

Changing impedance can alter the way certain microphones interact with the preamp and may produce changes in tonal character.

This can be especially useful when experimenting with ribbon microphones and darker microphone sources.

Rather than treating impedance as a fixed technical specification, the WA273 gives engineers the ability to use it creatively.

## 48V Phantom Power

Each channel provides **48V phantom power** for compatible condenser microphones and other equipment that requires it.

Phantom power should only be enabled when appropriate for the connected equipment.

Always confirm the power requirements of your microphone before engaging 48V.

## High-Pass Filter

A built-in **high-pass filter** helps reduce unwanted low-frequency information before the signal reaches the recorder.

This can be useful for minimizing:

-   Floor vibration
    
-   Handling noise
    
-   HVAC rumble
    
-   Excessive low-frequency buildup
    
-   Other unwanted sub-bass information
    

Filtering unnecessary low frequencies during recording can help create cleaner tracks and reduce corrective processing later.

## Polarity Reverse

Polarity inversion is available for situations involving multiple microphones or other signal relationships.

This can be particularly useful when recording drums, guitar cabinets and other sources using more than one microphone.

When two microphone signals interact poorly, checking polarity can sometimes produce a substantial improvement in the combined sound.

## Insert Points for Outboard Processing

Each channel provides a **switchable send/return insert**, allowing compatible external processors to be incorporated into the signal chain before the final output stage.

For example, you can build a recording chain such as:

**Microphone → WA273 Preamp → Compressor → WA273 Output Stage → Audio Interface**

This allows compressors, equalizers and other compatible outboard processors to become part of the tracking chain.

## Record Stereo Sources Through Matching Architecture

Because the WA273 provides two channels, it's particularly useful for stereo recording.

Use a pair of microphones on:

-   Piano
    
-   Drum overheads
    
-   Acoustic ensembles
    
-   Percussion
    
-   Room ambience
    
-   Stereo guitar setups
    

Both signals pass through the same general preamp architecture, helping create a cohesive stereo recording chain.

## Professional Rackmount Design

The WA273 is designed for integration into professional studio racks.

Install it alongside compressors, equalizers, converters, interfaces and other outboard equipment to build a permanent analog recording front end.

For studios moving beyond the preamps built into an audio interface, a dedicated outboard preamp can be one of the most meaningful upgrades to the recording signal chain.

## Key Features & Specifications

**Type:** Dual-channel microphone preamplifier  
**Channels:** 2  
**Preamp Style:** British console-inspired analog architecture  
**Maximum Gain:** Up to 80 dB  
**Circuit Architecture:** Fully discrete signal path  
**Transformers:** Carnhill transformer-balanced signal path  
**Microphone Inputs:** Yes  
**Line Inputs:** Yes  
**Instrument Inputs:** Yes  
**Phantom Power:** 48V  
**High-Pass Filter:** Yes  
**Polarity Reverse:** Yes  
**Input Impedance Selection:** Yes  
**Tone Control:** Switches input transformer impedance between approximately 1200Ω and 300Ω  
**Insert Points:** Switchable send/return inserts  
**Output Control:** Yes  
**Rackmount:** Yes  
**Primary Applications:** Vocals, drums, guitars, bass, ribbon microphones, acoustic instruments, stereo recording and professional studio tracking

## Who Is the Warm Audio WA273 For?

**Recording Engineers** — Add two channels of transformer-balanced analog preamplification to a professional tracking setup.

**Vocal Producers** — Build a high-quality analog front end between the microphone and audio interface.

**Ribbon Microphone Users** — Take advantage of substantial gain and switchable impedance when working with compatible ribbon microphones.

**Drum Engineers** — Record overheads, room microphones or individual drums through two channels of the same preamp architecture.

**Guitarists** — Record guitar cabinets with microphones or connect guitar and bass directly through the instrument inputs.

**Home & Project Studios** — Upgrade beyond the microphone preamps built into many standard audio interfaces.

**Professional Studios** — Add a versatile dual-channel preamp for tracking sessions, stereo recording and outboard signal-chain integration.

## Frequently Asked Questions

**What is the Warm Audio WA273?**  
The WA273 is a two-channel analog microphone preamplifier designed around a classic British console-inspired architecture.

**How many channels does the WA273 have?**  
It provides **two independent preamp channels**, making it suitable for both dual-mono and stereo recording applications.

**How much gain does the WA273 provide?**  
The WA273 provides up to **80 dB of gain**.

**Does the WA273 have an EQ?**  
No. The WA273 is the dedicated dual-channel preamp version. If you need the related model with integrated EQ sections, look at the **WA273-EQ**.

**Can I use the WA273 with ribbon microphones?**  
Yes. Its substantial available gain and switchable impedance make it particularly useful for many compatible ribbon-microphone applications.

**Can I use condenser microphones?**  
Yes. 48V phantom power is available for compatible condenser microphones that require it.

**Can I plug a guitar or bass directly into the WA273?**  
Yes. Instrument-level connectivity allows compatible electric guitars and basses to be connected directly for recording.

**What does the Tone control do?**  
The Tone function changes the input-transformer impedance, providing another way to alter how compatible microphones interact with the preamp and potentially change the resulting tonal character.

**Can I connect an external compressor?**  
Yes. Switchable insert points allow compatible external processing equipment such as compressors or equalizers to be incorporated into the recording chain.

**Do I still need an audio interface?**  
In most computer-based recording setups, yes. The WA273 is a microphone preamp rather than a USB audio interface. Its output is typically connected to an appropriate line-level input on an audio interface or converter.

**What's the difference between the WA273 and WA273-EQ?**  
Both are dual-channel British-style microphone preamps. The WA273 focuses on preamplification, while the WA273-EQ adds dedicated EQ sections for additional frequency shaping.

## Give Your Recording Chain an Analog Front End

The Warm Audio WA273 combines **two preamp channels, up to 80 dB of gain, Carnhill transformers, discrete analog circuitry, switchable impedance, high-pass filtering and flexible mic/line/instrument connectivity** in one professional studio processor.

Record a vocal.

Capture stereo drums.

Track a ribbon microphone.

Plug in a bass.

Record a piano.

Add external compression.

Or experiment with gain staging to create your own analog character before the signal ever reaches the DAW.

For musicians and engineers ready to move beyond relying exclusively on interface preamps, the WA273 provides a versatile two-channel analog front end for a serious recording environment.

**Need help building your complete recording signal chain?**  
Backline Music Gear can help identify compatible microphones, compressors, audio interfaces, converters, premium XLR cables, patchbays and other studio equipment based on your recording workflow.

_Warm Audio, WA273, Carnhill and related names are trademarks or property of their respective owners. Product and trademark names are used solely for accurate product identification. Specifications, components and included accessories are subject to manufacturer changes; verify the specific product configuration at time of purchase._

## Details

- **Price:** 1199.0 USD
- **Vendor:** Backline Music Gear

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1199.00 USD | In stock |

## Images

- WA273 Dual Channel British Mic Pre Warm Audio Tech/Pro Audio Gear

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> Source: [Backline Music Gear](https://backlinemusicgear.com/products/wa273-dual-channel-british-mic-pre-warm-audio-tech-pro-audio-gear)
> Updated: 2026-10-01