The remix is taken from from the companion audio of Led Zeppelin II (Deluxe Edition), which is part of the first three albums the band will re-issue on June 3rd. Pre-order the edition of your preference here.
About the alternate version of the song, Jimmy Page said: "This version of ‘Whole Lotta Love’ is the mix down from the night that we recorded it, so it doesn’t have any of the overdubs that everyone will be familiar with, because when they hear this they’ll think, ‘Oh yeah, that’s the original’ and all of a sudden they’ll go ‘No, it’s not.’"
Robert Plant added: "You can see how songs grow. There must have been five or six other takes of that, which are not present. So the shaping of these things is very interesting and you can hear with this particular version that we haven’t quite reached the point yet, and that it’s very, very close."
The video features a number of live recordings of the track. Check out below.