Exceptional analog warmth. Extraordinary tonal versatility. Professional studio performance.

The Warm Audio TB12 Tone Beast is a powerful, fully discrete microphone preamplifier designed to deliver the richness, punch, and unmistakable character of classic American recording consoles. Inspired by legendary 312-style preamp circuitry, the Tone Beast combines premium components with remarkable tonal flexibility, making it an outstanding addition to any professional or home recording studio.

What truly sets the Tone Beast apart is its ability to move effortlessly between pristine, detailed transparency and bold, harmonically rich analog saturation. Rather than offering a single fixed sonic character, it gives recording engineers and musicians extensive control over the texture, warmth, and presence of their recordings.

What Makes the Tone Beast Special?:

Premium CineMag USA Transformers. At the heart of its exceptional sound are premium American-made CineMag transformers, including two selectable output transformers:

• Steel-Core Transformer: Delivers rich midrange, punch, and vintage-inspired character.
• 50% Nickel-Core Transformer: Produces a more open, extended, and transparent response.

A transformer bypass option provides even greater tonal flexibility.

Two Distinct Discrete Op-Amps:

Choose between two classic-inspired operational amplifier designs:

• 1731-Style: Rich, colorful, vintage-inspired character with pronounced harmonic saturation.
• 918-Style: Cleaner, smoother, and more transparent reproduction.

These selectable circuits provide an impressive range of tonal possibilities, from subtle warmth to assertive analog coloration.

Exceptional Gain and Saturation Control:

With up to 71 dB of gain, the TB12 accommodates a wide variety of microphones, including gain-hungry dynamic and ribbon microphones.

Independent gain and output attenuation controls allow engineers to drive the internal circuitry for rich harmonic saturation while maintaining control over the output level.

Additional Professional Features:

• Selectable tantalum and electrolytic capacitors for further tonal refinement
• Switchable input impedance (150/600 ohms)
• High-impedance instrument input for guitars, bass, and keyboards
• +48V phantom power
• 80 Hz high-pass filter
• −20 dB attenuation pad
• Polarity reversal
• Balanced XLR and TRS connections
• Rear-panel inserts for integrating external processors
• LED metering for monitoring signal level
• Professional 19-inch, single-rack-space design

Outstanding Recording Applications:

The Tone Beast excels across an impressive range of recording situations:

• Vocals: Adds warmth, richness, presence, and expressive detail.
• Electric Guitar: Delivers punchy mids and powerful analog character.
• Acoustic Guitar: Captures articulation, natural resonance, and clarity.
• Drums and Percussion: Brings impact, transient definition, and energy.
• Bass and Keyboards: Produces substantial low-end presence and harmonically engaging tones.

Its extraordinary flexibility makes it especially appealing to producers who want multiple sonic personalities from a single high-quality preamp.

Condition & Functionality

This is in pristine condition, and includes its original Warm Audio Tone Beast packaging and external power adapter.

Power-on tested: The unit powers on, as evidenced by the illuminated indicator visible in the listing photographs.

What's Included

• Warm Audio TB12 Tone Beast Microphone Preamplifier – Original Orange Finish
• External Power Adapter
• Original Warm Audio Tone Beast Box

The Warm Audio TB12 Tone Beast offers something that many conventional microphone preamps cannot: the freedom to shape the character of your sound at the hardware level.

With premium CineMag USA transformers, selectable discrete op-amps, sophisticated tone-shaping capabilities, and classic analog circuitry, it delivers a level of versatility and creative control that makes it a compelling centerpiece of any recording signal chain.