Keeley Electronics D&M Drive and Boost harmonic in a considerably small package

in a considerably small package

Envelope filters or auto-wahs as they are often called

simply put

Top Right - High cut/boost

Oklahoma by rabid Zappa fans

Keeley Electronics D&M Drive and Boost harmonic in a considerably small packageMaker: Keeley Electronics Model: D&M Drive and Boost Condition: New Description: The D&M Drive for That Pedal Show The D&M Drive is the perfect storm of Drive and Boost. The D&M offers a gorgeous sounding high voltage Boost side designed to impart the perfect tone on any amp that needs to be pushed. No longer will you wonder what the perfect clean boost should be. As you roll things up, the drive morphs your tone into singing gold. A sexy and smoothly