overamplify

verb2

1. •
   To amplify to an extent that distorts the original sound or signal

   • Pastor Andres's public voice was deep and rumbly; with the mike overamplifying him, and the faint Hispanic accent, he was hard to understand. — 2006
2. •
   To amplify to an extent that is undesirably loud.

   • Physiological thresholds can differ from behavioral thresholds by ±15–20 dB HL. Thus, without verification of behavioral responses with amplification, hearing aids may underamplify or overamplify. — 2006