MXL-MICMATE DYNAMIC XLR To USB Preamp for Dynamic Mics by MXL. $54.25. This pocket-sized device features a 16-bit Delta Sigma A/D converter with a sampling rate of 44.1 and 48.0 kHz. The Mic Mate™ Dynamic is optimized for use with dynamic microphones, providing enhanced front end gain, and no phantom power. Record directly into your computers USB port with your favorite dynamic mic.