The doom metal heroes are planning their first LP since 2009’s Monoliths & Dimensions.

After releasing two excellent collaborative albums in 2014, Sunn O))) have announced plans to spend the New Year working on a new full-length effort.

In a recent newsletter from the longtime pair of Stephen O’Malley and Greg Anderson, the duo elaborated on their plans for 2015.

They explained: “O))) are working on three new tours in both US and EU and also will be continuing work on a brand new SUNN O))) album across the span of 015. We are looking forward to unleash to the masses.”

Further details about the project remain scarce.

Last year, Sunn O))) released Terrestrials, a collaborative album with Norwegian experimental collective Ulver, and Soused, a joint LP with veteran musician Scott Walker. [via Exclaim]