It all started back in the late 70's with an idea to make a better bass speaker. Larry Hartke had seen bass rigs getting bigger and louder, but they really weren't getting better. He realized that a bass speaker had to be fast - really fast - to keep up with a bass player's fingers, and deliver perfect tone and articulation in the upper octaves. Larry went in a new direction, designing a revolutionary 10' bass speaker with a rigid aluminum cone that was wicked fast and had exceptional tone. After countless revisions and endless testing, Larry finally found the sound he was looking for; loading eight of his silver bullets into a multi-chambered, front loaded touring cabinet. He took it to the pros to check out, they loved it, and the Hartke - Transient Attack was born! Larry's spirit of innovation never stopped and Hartke is proud to introduce the HyDrive HD Series Bass Cabinets loaded with all new Kevlar and aluminum hybrid drivers that deliver exceptional tone and transient response in every size and configuration.