Warm Audio TB12 Tone Beast Microphone Preamp – CineMag Transformers – Original Box is a used item in excellent condition, listed on Reverb. The asking price is £448. It is offered by Marsx Gear through Reverb. Local pickup is available. It is in our Preamps & Channel Strips category. 14 similar listings have a median asking price of £332. Used Gear Hunter first saw this listing on 26 October 2026 and last saw it on 9 November 2026. It has been seen 22 times in our scans. Prices are converted from the seller's currency when we scan the listing, so the amount you pay may differ slightly. The seller sets shipping, and import duty or VAT may apply, so check the final cost and the item's details on Reverb before buying.
From the seller
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.