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Warm Audio TB12-500 Tone Beast Microphone Preamplifier

Warm Audio TB12-500 Tone Beast is a single-channel 500-series microphone preamplifier with up to 71 dB gain, switchable op-amps and output transformers, and dual impedance settings for optimal microphone performance.

Overview

The Warm Audio TB12-500 Tone Beast Microphone Preamplifier is a professional-grade single-channel preamp in 500-series lunchbox format. With selectable discrete op-amps, CineMag output transformers, and impedance options, it delivers both vintage-coloured and transparent modern sound character to microphone, instrument, and line-level sources. The front-panel instrument input enables DI recording, while the 20 dB pad and 80 Hz high-pass filter provide essential recording control.

Key Features

  • Single-channel 500-series format fits standard lunchbox frames
  • Up to 71 dB of input gain for optimal microphone and dynamic source levels
  • Selectable op-amps (1731-style and 918-style) for vintage or modern tone
  • Two CineMag output transformers selectable or bypassable for tonal shaping
  • Dual input impedance settings (150 Ω and 600 Ω) for dynamic, condenser, and ribbon microphones
  • 48V phantom power for condenser microphones
  • 20 dB pad for preventing clipping on hot sources
  • 80 Hz high-pass filter to remove rumble and low-frequency noise
  • Front-panel instrument input for direct DI recording
  • Polarity reverse switch for phase-critical applications

Specifications

  • Type: Microphone Preamplifier (500-Series)
  • Gain Range: Up to 71 dB
  • Input Impedance: Switchable 150 Ω / 600 Ω
  • Output Impedance: 150 Ω and 600 Ω (selectable)
  • Op-Amp Options: 1731-style and 918-style discrete op-amps
  • Output Transformer: Dual CineMag transformers (switchable/bypassable)
  • Phantom Power: 48V DC
  • Pad: 20 dB
  • High-Pass Filter: 80 Hz
  • Power: External 24V AC power transformer
  • Dimensions: 9.9 × 8.3 × 5.5 inches
  • Weight: 1.81 kg
  • Color: Orange
  • Country of Origin: United States

Why buy from Procure.ae

Procure.ae supplies professional recording equipment and audio processors to studios, broadcast facilities, and sound engineers across the UAE and GCC. The TB12-500 is ideal for institutional recording setups requiring flexible microphone preamplification. Request a quote for competitive pricing and technical consultation on preamp selection for your facility.

FAQ

Which op-amp should I choose for my application?
The 1731-style op-amp adds noticeable vintage character and early saturation; the 918-style provides a more transparent, modern tone. Experiment with both to match your recording aesthetic.

Can I use this preamp with different microphone types?
Yes, the dual impedance settings let you optimize the preamp for dynamic microphones (150 Ω), condensers (600 Ω), or ribbon mics. The adjustable impedance ensures maximum gain and headroom for each type.

What is the benefit of switchable output transformers?
The CineMag transformers add harmonic colouration and saturation; leaving them in-circuit for coloured tone or bypassing them for transparent, direct recording.

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