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RA4PA & RA16PA Medusa PreAmps

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


Medusa4Z BioAmp

Medusa4Z Amplifier

Research Uses


  • Low channel count neurophysiology
  • Auditory research