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LaChapell Audio LaChapell Audio

LaChapell Audio 983M Tube Mic Preamp

Q&A SKU #L57399000000000
1199.99 $1,199.99
25 $25/mo. with 48 months financing*
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Single-channel tube mic preamp.

The LaChapell Audio 983M is a half rack sized single channel tube preamp that is perfect for small studios, podcasting, voice overs, and session musicians. Along with the 983S MK2, the 983M is the first preamp to feature True48™, a phantom power supply that provides a consistent 48V for phantom powered mics. Current 48V supplies dip in voltage as the source load changes (such as periods of high transients on many mics). True48 evens out the voltage supply, giving mics greater headroom and a smoother, less distorted response.

Dual Drive Knobs

The Dual Drive knobs on the 983M mic pre provide an incredible array of tonal options. The input knob drives the input to the first vacuum tube and the second knob drives the input to the output tube. Together, you can dial in sounds from pristine to warm and harmonically rich.


True48 is a dynamic phantom power supply that provides a steady power supply for your contender and active microphones. Standard phantom power supplies often do not deliver enough power for todays microphones. True48 ensures your mics get the power they need which results in higher headroom, quicker transient recovery, and smoother response.

Input Level LEDS

A four segment input level indicator lets you see the input level allowing your to make appropriate gain decisions.

Pad Switch

The pad switch not only provides a -20dB gain reduction for high input sources, it also works with the Dual Drive knobs to create color and headroom options. Engage the pad and dial in warm tones with lots of headroom.
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Everything in the 983S mic pre is designed to be best in class. Every component, transformer, wire and tube has been meticulously selected for performance and longevity.

Low Noise and Output Impedance

The ultra low output impedance of the 982S mic pre means you can run long cables from the stage to front of house or from studio room to studio room. The ultra low noise means you can record any source with confidence that you are only recording what you WANT to record.
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Independent High and Low Pass Filters with selectable frequencies maximize control over your recorded or live signal.

HI-Z Input

The front panel Hi-Z input allows you to plug a bass or other instrument directly into the 983M. As an instrument front end, the 983M allows for natural tube compression and harmonics to any input source.


  • Internal gain: 0 to >72.5db
  • THD+N: 0.010% (minimum)
  • Frequency response: 9hz to 40khz
  • Max output (1% thd+n): +27.8dbu
  • Typical ein: -124dbu
  • Input impedance: 1.5kω
  • Tube compliment: 1 x 12ax7 / ecc83

Your main mic is worth it. Get a great channel with the addition of the 983M.


983M Tube Mic Preamp Specifications:

  • Internal gain: 0 to >72.5db
  • THD+N: 0.010% (minimum)
  • Frequency response: 9hz to 40khz
  • Max output (1% thd+n): +27.8dbu
  • Typical ein: -124dbu
  • Input impedance: 1.5kω
  • Tube compliment: 1 x 12AX7 / ECC83

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