Carl Christoffer Lundquist, born 1970, is a Swedish musician and producer. His own band is Brainpool where he started as a bass player and backing vocalist, but has moved to play both the bass and the guitar. Brainpool won a Swedish Grammy in 1994 (best new band). He has also produced albums by Per Gessle and Gyllene Tider and played in the backing groups of Roxette and Gessle.
In May 2011, Christoffer released his debut solo album, Through the Window. All the songs on the album were co-written with songwriter Michael Saxell. The album reached #29 on the Swedish album chart. Also in May, Christoffer was the first person ever to be awarded the Sir George Martin Award at a gala event in Malmö, Sweden. The award came with SEK100,000.