Boost it! MXR MC401 Boost/Line Driver. Simple, can be used as an ultra-clean boost, or drive effects for more dynamics and sensitivity. The Boost/Line Driver provides up to +20dB of ultra-clean boost to rejuvenate the sparkle, punch, and brilliance of your sound. From the Custom Audio Electronics division of MXR! • MFSKU MC401 • UPC 710137031944