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Warm Audio TB12 Tone Beast Microphone Preamp - Black-NEW 

In brief: Mic/Instrument Preamp with Variable Character, 71dB of Gain, CineMag Transformers, Discrete Op-amp Section, Selectable Capacitors, Variable Impedance, and Highpass Filter - Black

The Warm Audio TB12 Tone Beast is not just a mic preamp — it’s a tone-shaping powerhouse built for engineers who crave character, flexibility, and serious sonic impact.

Inspired by the classic API 312 design and loaded with premium CineMag input and output transformers, the TB12 delivers big, bold, professional sound right out of the box. But what truly sets the Tone Beast apart is its multiple discrete signal paths, allowing you to tailor your sound with the flip of a switch.

Massive Tonal Flexibility

The Tone Beast gives you unprecedented control over your color palette:

• Op-Amps:
  Choose between the Melcor 1731 for rich, aggressive coloration and early breakup, or the Jensen 918 for a cleaner, more open tone with subtle character.
• Transformers:
  Select a 100% steel output transformer for thicker, more saturated tone, or a 50% nickel transformer for smoother response. You can even bypass the transformers entirely for ultra-clean clarity.
• Capacitors:
  Switch between tantalum and electrolytic capacitors to fine-tune harmonic response and overall vibe.

Push the input and the TB12 rewards you with musical harmonic distortion that adds grit and attitude to electric guitars, bass, drums, or vocals that need to cut through the mix.

Built for Engineers Who Love Color

The most sought-after vintage consoles and outboard gear weren’t transparent — they added personality. The Tone Beast embraces that philosophy. If your recordings feel flat or lifeless, this preamp injects depth, punch, and vibrancy that transforms ordinary tracks into professional productions.

Premium Components, Exceptional Value

Warm Audio builds the TB12 using high-quality components, including genuine CineMag transformers, delivering boutique-level tone without boutique pricing. For the cost of many single high-end preamps, you can load your rack with two or more Tone Beasts — perfect for stereo recording, live drums, or multi-track sessions.

Features:

• Free shipping, delivery within 2 to 3 business days or less.
• We are an authorized Warm Audio dealer.

• Discrete 312 preamp design with CineMag transformers delivers stellar tone
• Choice of Melcor or Jensen op-amps for varying character
• Op-amps are socketed/swappable — add your own op-amps to the mix!
• Choice of steel or nickel output transformers for more tonal options
• Choice of tantalum or electrolytic capacitors for even more character variation
• Transformer bypass switch provides an ultra-clean character
• Tone switch allows for variable mic impedance
• 80Hz highpass filter cuts the mud and rumble
• 20dB pad tames really loud sources
• Output attenuation for saturation flexibility of both op-amps and transformers
• Insert allows the use of in-line processors
• LED VU meter lets you monitor your levels
• Preamp Type: Solid State
• Number of Channels: 1
• Phantom Power: Yes
• Pads: -20dB
• Polarity Switch: Yes
• EQ: 80Hz Highpass Filter
• Analog Inputs: 2 x XLR (mic), 1 x 1/4" TRS (Hi-Z), 1 x 1/4" (line in), 1 x 1/4" TS (receive)
• Analog Outputs: 1 x XLR, 1 x 1/4" TRS, 1 x 1/4" TS (send)
• Channel Inserts: Yes
• Rack Spaces: 1U
• Power Source: Standard IEC AC cable
• Height: 1.75"
• Width: 19"