2026 Upgraded RO03 Mic Preamp, 120Db EIN Ultral Low Noise Booster, for Dynamic &
Connect SM58 to RO03 XLR input. Link RO03 output to 2i2 6.35mm Line In via XLR-TRS cable or 6.35mm TRS cable. Set 2i2 gain to minimum, then adjust RO03 gain slowly for a healthy signal level. Replace your interface’s preamp with the RO03 for more cleaner, quieter recordings.