LP Underground 4.0 is a CD and digital download set released in November 22, 2004 by Linkin Park Underground.The EP was the fourth EP by LP Underground. This EP is one of the EPs released per year by the fan club. This is the third EP produced by Machine Shop Recordings.

Content

The EP contains two original tracks which were not included in any of the albums. The rest of the four tracks were live versions of the songs included in various albums and covers of other bands. “Wish”, a single by the band Nine Inch Nails, was covered by Linkin Park during their show Projekt Revolution 2004, which Chester Bennington is able to pull a 16-second scream during the performance. A mash-up song by the band of the songs “Step Up/Nobody’s Listening/It’s Goin’ Down”, also known as “Hip-Hop Medley”, was also played in the same show. “One Step Closer” was also performed live during the Projekt Revolution tour, which features a guest appearance from Korn lead singer Jonathan Davis during the bridge from “1stp Klosr”.