The first version of the Diezel VH4 Preamp/Overdrive pedal (based on the company's high-gain VH4 tube amplifier' Mega channel) was launched in 1994 and became an instant classic for metal guitarists. Recently, the German company has unveiled a 2nd version of the pedal, called VH4-2, featuring two separate channels of that same circuit…Click on the title for more