The Dr. Robert "Whole Lotta" pedal is a special edition of Aclam's renowned Dr. Robert, distinguished by an exclusive black finish and custom graphics inspired by Led Zeppelin. While the original Dr. Robert pedal accurately replicates the legendary VOX UL730 amp—used by Zeppelin, The Beatles, and Division—this limited edition comprises only 69, a tribute to the year1969 when Led Zeppelin released their debut album. It retains the same powerful, versatile overdrive with a new look that honors Zeppelin's classic rock sound and style.

The circuit also operates at the same voltages as the original amp, thanks to a charge pump circuit that converts the 9VDC from the battery or DC input to 18VDC.