This pedal works great!

The Boss HM-2 Heavy Metal is a distortion pedal manufactured by Boss from October 1983 until October 1991. Designed to emulate a Marshall stack, it became associated with Swedish death metal and gained a cult following in the heavy metal scene.

Background

The Boss HM-2 was first issued in October 1983. It was originally manufactured in Japan from 1983 until 1988 and then in Taiwan from 1988 until 1991.[1] It was designed to emulate the mid-range response of a Marshall stack.[2] The HM-2 is based on Boss's DS-1. Despite achieving moderate success in the glam metal scene, the pedal was discontinued in 1991; it was succeeded by the HM-3 Hyper Metal and MT-2 Metal Zone, the latter of which became a commercial success and top-selling Boss pedal.[2]

Since its discontinuance, the HM-2 has become one of the most demanded pedals of the Boss back catalogue.[3][1][2] Guitarist and record producer Kurt Ballou has been cited as an influence for the pedal's resurgence[4] and bands such as Nails and Rotten Sound have also appropriated the pedal's sound for different extreme metal styles.[5]