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RA4PA & RA16PA Medusa PreAmps

The RA4PA offers four channels for researchers doing ABRs or low channel count neurophysiology recordings.  The RA16PA is a sixteen channel version.  As a low cost alternative for researchers requiring lower resolution, the Medusa PreAmps have lower resolution, a lower input range of +/- 4 mV and a higher noise floor compared to TDT’s PZ preamplifiers.

Check Out the Latest 4-Channel Amplifier


Medusa4Z BioAmp

MedusaZ Amplifier

Research Uses


  • Low channel count neurophysiology
  • Auditory research