Pro Audio Equipment

You are here:Home / Products / Microphone Preamplifiers / Warm Audio TB12 "Tone Beast"

Warm Audio TB12 "Tone Beast"

  • Description
  • Image Gallery
  • Specifications
  • Reviews
  • Media
Tone Shaping Mic Preamp w/ DI

Unleash The Beast!

The TB12 Tone Beast is a fully professional preamp design with loads of gain that can effortlessly capture an array of sources very well.  It is a swiss army knife full of options and tones. With top notch CineMag transformers and multiple discrete signal paths, it's hard to beat the Tone Beast's big, bold, fully-professional sound at this price.​ The Tone Beast is a mic pre that likes to be pushed and when pushed will colorize your signal ever so sweetly. The 2 opamps and 2 output transformers at the flip of their switches won't appear to be much different, but as one drives the pre into harmonic distortion, the unique character of each of these components becomes apparent.  The Tone Beast is customizable and allows users to source and swap in their own opamps.  I've pulled my best tones from this pre right at the saturation point (as loud as I can push the gain before clipping). The output control on the TB12 allows you to limit the signal exiting the preamp even when pushing the gain to really hot levels, giving you maximum control.

Tone Shaping Mic Preamp w/ DI - Made Affordable.

When designing the TB12 Tone Beast our goal was to make a microphone preamplifier affordable and jam packed full of options, without compromising the quality and design parameters that make this type of microphone preamplifier so desirable.

Premium Components in every Warm Audio product.

The TB12 "Tone Beast" is a fully discrete, high-voltage microphone preamplifier, utilzing CineMag USA Transformers. Have no fear of hurting the Beast, you can push it very hard into full-on distortions if you wish, and these can sound quite nice on electric guitar, bass or anything else that likes some grit. When hand building mic pres I learned a bit about the "subtle" differences component choices can make. A little change here, and another there often times became a huge deal in a finished mix, but isn't always very noticeable at first take. The different component options in the TB12 are subtle, but when driven into saturation are noticeable and can make a big difference to the way your final mix will sound. Home-based musicians and professional studios alike will find the Tone Beast to be an extremely powerful and fully professional piece of gear that is capable of warming and shaping signals/mixes in a way that is very pleasing to the ear.

Utilizes premium grade CineMag USA Transformers.

71db of gain.

Transformer selection provides both Steel and 50% Nickel CineMag output transformers for varying character.

Transformer bypass switch allows for removal of the output transformer from the circuit.

Discrete Opamp selection allows for choosing between a 1731(vintage) and 918(cleaner) style opamp.  These are socketed/swappable with your choice of 2520 6 pin footprint opamps.

Impedance switch labeled TONE to switch between 150 and 600 ohms input impedance.

2 Meg Ohm True HI-Z input on front panel sends instrument signal through entire circuit including both Cinemag Transformers and the discrete opamps. Great for guitars, bass, keyboards and other instruments that have a 1/4″ output jack.

Capacitor selection between Tantalum and Electrolytic for different characters.

80hz hipass filter.

Polarity Reverse.

+48V phantom power.

Output attenuation allows for saturation flexibility of both opamps and transformers.

¼" insert for the use of inline compressors, eq's etc.

Balanced XLR mic (front and back), balanced TRS line, and ¼" instrument inputs.

Balanced XLR and TRS outputs.

-20db Pad.

LED VU Meter.

19" rackmountable.

External line-lump 24V AC power transformer for low noise.

Reviewed by Hannes Bieger on SoS

Read the full review here (external link)


Reviewed by Alan Tubbs on TapeOs

Read the full review here (external link)


Reviewed by MUSICTECH.NET  February 12, 2014

Read the full review here (external link)


"As someone whose main focus is tracking, I try and get the source to sound as “mix-ready” as possible and the WA TB12 has upped the front-end game by quite a lot. With a ton of sonic variations that the TB12 allows me, I can now dial in the exact vibe/mojo I’d like on my guitar/bass/keys tracks!"

Victor Lee

Studio Musician & Producer


"Superb quality and great tone-shaping abilities. Great value."

Future Music


"All I can say, is that I can't imagine wanting anything else in this price range. It is truly unbeatable as far as I can tell."

Eric Watkins



"The WA TB12 is also built using Cinemag transformer components. I have a pair of the EQP-WA and they sound fantastic as well, they are also built around Cinemag transformer components. Give the Tone Beast a try, you won't be disappointed."

Mark King

Los Angeles, California


aml logo bettermaker logo Grace Design logo lewitt logo lindell logo line audio logo   miad logo  

ShippingFree Shipping and other shipping options


We offer free shipping for products under 6 Kgr and over 199 € within Greece and over 299 € in Europe.

NewsletterGet exclusive offers and the latest news on our products