DISC Warm Audio TB12-500 Tone Beast Mic Pre with DI

599.00 (including VAT @ 23%)

This product is currently not available for purchase

  • Discrete 312 Preamp Design
  • Steel and Nickel CineMag Output Transformers
  • Classic 1731 and 918 Style Opamps
  • Capacitor Selection Provides Different Characters
  • XLR, TRS and 1/4'' Inputs with XLR and TRS Outputs

DISC Warm Audio TB12-500 Tone Beast Mic Pre with DI


The Warm Audio TB12-500 Tone Beast is an incredible mic preamp that has plenty of gain to offer, effortlessly capturing an array of sources incredibly well. The TB12-500 Tone Beast provides you with the ability to select different transformers, opamps and capacitors as well as enjoying a wide range of tones in the process. When you really push the Tone Beast, you'll find harmonic distortion that's perfect for electric guitars, bass and anything that needs some grit. Or, use the bypass function and the TB12-500 will deliver incredible, ultra-clean tones.

Product Ref: 63460

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History Behind the Tone Beast

In the 60's and 70's many console/preamplifier builders hid the operational amplifier (opamp) of their preamps by cramming the components into a small box and then attaching the box to the circuit board. Inside these small boxes, the components were covered in glue to make them hard to disassemble/analyze. Manufacturers felt the character of these opamps was unique enough to protect.

The TB12-500 Tone Beast utilises this same square shaped opamp and pin configuration as the originals but without the plastic and glue housing. The TB12-500 is designed so that the stock opamp can be removed and replaced with whatever takes your fancy, allowing you to tweak and customise your sound as much, or as little as you like.

Multiple Discrete Signal Paths with Unprecedented Flexibility

By combining different mics with different preamps, you can make every source sound its absolute very best. First of all, you have the choice of a 1731 or 918 opamp; The 1731 is extremely coloured and break up quickly, while the 918 is fairly clean with a touch of character. Secondly, you have the choice of a 100% steel or 50% nickel transformer; The steel output transformer is more coloured than the nickel, especially when pushed. For even more tonal variety, the Tone Beast is provides you with the choice of tantalum and electrolytic capacitors.


  • Discrete 312 preamp design
  • Provides 71dB of gain
  • Transformer selection; Steel and 50% Nickel CineMag output for varying character
  • Transformer bypass switch allows for removal of the output transformer from the circuit
  • Discrete opamp selection with 1731 (vintage) and 918 (cleaner) style opamps
  • Socketed/swappable with your choice of 2520 6-pin footprint opamps
  • Switchable impedance between 150 ohms and 600 ohms
  • Capacitor selection between Tantalum and Electrolytic
  • 80Hz hipass filter
  • Polarity reverse
  • +48V phantom power
  • Output attenuation allowing for saturation flexibility of both the opamps and transformers
  • Balanced XLR mic, balanced TRS line and 1/4'' instrument inputs
  • Balanced XLR and TRS outputs
  • -20dB pad
  • LED VU meter
  • Designed for use in standard 500 series power racks
Your order may be delivered with a plug adapter
If any electrical items in your order are supplied with a United Kingdom plug connection, a suitable plug conversion adapter will be included free of charge.