Having become the stuff of eBay legend, Southern Lord have decided to officially re-release the first demo recordings from Sunn O, chucking in the previously unavailable 'Grimm & Bear It' for extra fortification. Sunn O describe 'The Grime Robe Demos' as "seventy-two minutes of bestial riffing and unholy drone" and who are we to disagree. Sunn O deal in wave after wave of oppressive guitars and bass which is dealt up in twenty-minute chunks that leave you shaken and disorientated. Imagine the loud, squally bits of Mogwai but without the rhythms or any hope of it all reducing down into melodious calm and you're almost there. Not for the faint hearted.

• Boomkat