“Tonwerk” is a 4-band high-end bass preamp in pedal form. Depending on the band, three different frequencies can be selected. The preamp can also be used as a practice amp. battery or mains operation are possible. In addition to the four-band equalizer, each of the three selectable frequencies offers a D.I. Out (pre / post EQ switchable), True Bypass and a high quality headphone output. Marleaux Tonwerk is designed and made in Germany!