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Warm Audio WA-WL Warm Lifter Inline Mic Preamp — main product image
Warm Audio

Warm Audio WA-WL Warm Lifter Inline Mic Preamp

4k48vphantom power

Deliver 26dB of clean, impedance-matched gain to low-output ribbon and dynamic mics with built-in tone shaping.

$149.00*
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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 WA-WL Warm Lifter is an inline active microphone preamp purpose-built to solve one of the most common frustrations in audio production: getting sufficient clean gain from low-output passive ribbon and dynamic microphones. Many audio interfaces and mixers struggle to provide enough gain for these microphone types without introducing unwanted noise, and the Warm Lifter addresses this by delivering a true 26dB of clean analog gain through an ultra low-noise JFET input stage. Its 2.4k Ohm input impedance is carefully engineered to match the output characteristics of low-output microphones, eliminating impedance mismatch issues that can cause signal loss, altered frequency response, and phase anomalies.

Beyond simple gain boosting, the Warm Lifter includes two selectable tone-shaping tools: a 100Hz high-pass filter that cleans up low-frequency rumble and proximity effect buildup, and a 3kHz high-shelf boost that adds presence and clarity to darker-sounding microphones. The fully balanced signal path from input to output preserves signal integrity throughout, and the unit draws its power from standard 48V phantom power supplied by the connected interface or mixer. Every unit is hand-tested and inspected by trained technicians at Warm Audio's facility in Austin, Texas. The durable construction makes it equally at home in a studio rack setup or tucked into a live sound rig, providing a reliable and effective gain solution wherever clean amplification of low-output microphones is needed.

Key Features

Low-Output Mic Magic: The Warm Lifter offers 26 dB of clean gain to low-output microphones, including passive ribbons and certain dynamic models, ensuring optimal performance in both recording and live scenarios where additional gain is crucial for accurate detail and frequency response, especially when connected directly to interfaces.

True 26dB Of Clean Gain: Warm Lifter will always deliver 26dB of clean output gain, regardless of the mic that you choose. Unlike some inline preamps, signal boosters, and lifters, the circuit design of the Warm Lifter protects your recording from signal loss or phase issues by ensuring there is no “mismatching” of impedance between your mic of choice and the Warm Lifter

Added Frequency Flexibility: The Warm Lifter has a selectable 100 Hz high-pass filter to remove unruly low end frequencies for added clarity and detail. Additionally, the Warm Lifter has a selectable 3 kHz high-shelf boost to emphasize the upper-mids and highs for clarity and detail boosted on darker mics.

Impedance Matching: The Warm Lifter input impedance is 2.4k Ohm, and will consistently act as a matchmaker between low output microphones and interfaces/mixers to solve common impedance mismatch problems like signal loss, altered frequency response, and phase issues.

Studio Sound & Road-Ready: The Warm Lifter houses an ultra low-noise JFET input with a fully balanced (ins/outs) signal path and operates on 48v phantom power. The incredibly durable build quality adds to the total package to deliver a critical piece of audio utility gear that you will want by your side at all times.

Hand-Tested In Austin, TX: Like all Warm Audio gear, every single Warm Lifter is meticulously hand-tested and inspected by trained technicians with a passion for making music in Austin, TX USA.

Specifications

Type
Inline Active Microphone Preamp
Gain
26dB (True Analog)
Input Impedance
2.4k Ohm
High-Pass Filter
100Hz (Selectable)
High-Shelf Boost
3kHz (Selectable)
Input Stage
Ultra Low-Noise JFET
Signal Path
Fully Balanced (In/Out)
Power
48V Phantom Power
Brand
Warm Audio
Model
WA-WL

Pros & Cons

👍 Pros

  • Provides a consistent 26dB of clean gain without introducing noise or phase issues thanks to the ultra low-noise JFET input design
  • Selectable 100Hz high-pass filter and 3kHz high-shelf boost offer useful tone-shaping without needing additional outboard gear
  • 2.4k Ohm input impedance solves common mismatch problems between low-output mics and interfaces
  • Fully balanced signal path maintains signal integrity from input to output
  • Rugged build quality and phantom-powered operation make it practical for both studio and live applications

👎 Cons

  • Requires 48V phantom power from your interface or mixer, limiting use with equipment that lacks phantom power
  • Fixed 26dB gain with no variable gain control means you cannot fine-tune the boost level
  • Only two tone-shaping options with fixed frequency points offer limited flexibility compared to a full-featured preamp
  • Adds another inline device and XLR connection to the signal chain

Frequently Asked Questions

The Warm Lifter operates on 48V phantom power supplied by your audio interface or mixer, so no batteries or external power supply are needed.
It is designed for low-output microphones, particularly passive ribbon mics and certain dynamic models that struggle to produce sufficient signal level when connected directly to an interface or mixer.
Yes, its 2.4k Ohm input impedance is specifically designed to act as a buffer between the microphone and your interface or mixer, preventing impedance mismatch issues like signal loss, altered frequency response, and phase problems.
The 100Hz high-pass filter removes low-frequency rumble for a cleaner signal, and the 3kHz high-shelf boost adds presence and clarity to darker-sounding microphones. Both are independently selectable.
Yes, its fully balanced signal path and durable construction make it road-ready for live sound applications in addition to studio use.

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