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LaChapell 983M Tube Microphone Preamp
LaChapell 983M Tube Microphone Preamp

LaChapell 983M Tube Microphone Preamp

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SoundPro Item: 107929
MPN: 983M
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The LaChapell Audio 983M is a half rack sized single channel tube preamp that is perfect for small studios, podcast studios, 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, quicker transient recovery and a smoother less distorted response.

The LaChapell 983M is capable of stunning clean tones and harmonically rich driven tones. Exceptional on nearly any source, the 983M features high and low pass filters with selectable roll-off frequencies, channel mute, front panel Hi-Z input, pad and polarity switches.

LaChapell 983M Features

  • Dual Drive knobs
  • True48 dynamic phantom power
  • Input level LEDs
  • Pad switch for more tonal options
  • Low noise and output impedance
  • High and low pass filters
  • Front panel Hi-Z input
  • 983M tube microphone preamp1
  • Mounting screw packet1
  • Internal Gain (microphone)72.5dB
  • Internal Gain (Hi-Z)53.8dB
  • Max. Output Gain+27.8dBu (1% THD+N, 22Hz - 20kHz)
  • Frequency Response9Hz - 40kHz
  • THD+Nvariable 0.01% - 18% (per tube drive (input) gain control with -40dBu input at 1Khz
  • Noise (EIN)-124 dB
  • S/N Ratio92dB (30dB of gain, 22Hz - 20kHz)
  • Input Impedance (microphone)1.5K Ω
  • Input Impedance (Hi-Z)100K Ω
  • Output Impedance8 Ω
  • Tube Complement / Type1 x 12AX7/ECC83 (one per channel)

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