4 Walls

4 Walls
Digital and "Orange" version cover
Studio album by f(x)
Released	October 27, 2015
Recorded	2015
Studio	SM Studios, Seoul, South Korea
Genre	Electropop house synth-pop
Length	35:18
Language	Korean
Label	SM Entertainment Genie Music
Producer	LDN Noise Tay Jasper Adrian McKinnon Andreas Öberg Maria Marcus Dsign Music Ryan S. Jhun Anjulie Persaud Syron Kenzie Taylor Parks Jussi Karvinen The Stereotypes Ylva Dimberg Shaun David Dawood Pelli Makeba Riddick Bonnie McKee Carly Rae Jepsen Matt Radosevich Steve Robson Hwang Hyun
F(x) chronology
Red Light (2014) 4 Walls (2015) 4 walls / COWBOY (2016)
Singles from 4 Walls
"4 Walls" Released: October 27, 2015

4 Walls is the fourth studio album by South Korea-based girl group f(x), released by SM Entertainment and Genie Music on October 27, 2015. A dominant electropop and synthpop record that incorporates various genres, such as house, EDM and UK garage, 4 Walls was composed by several production teams and songwriters, namely LDN Noise, The Stereotypes, Kenzie, Ryan S. Jhun, Makeba Riddick, Carly Rae Jepsen, among others, with Lee Soo-man served as the executive producer of the release. It marked f(x)'s first major release since Red Light in July 2014, and subsequently the group's first and currently the only major release as a quartet since the departure of former member Sulli in August 2015.^[1]

Upon its release, 4 Walls received favorable reviews from music critics for showcasing all members' vocal abilities more and its "trendy" production. The album also attained commercial success, becoming their fifth and final chart-topper on the Gaon Album Chart, and has since sold over 81,000 physical copies in South Korea as of March 2016. It also earned success for f(x) in the United States, becoming their second release to achieve No. 1 on the Billboard World Albums Chart and charted at number thirty-nine on the Japanese Oricon Albums Chart.

To promote the album, its titular track was released on October 27, 2015 to both critical and commercial success, peaking at number two on both the Gaon Digital Chart and the Billboard World Digital Songs. The group also appeared and performed the single on several music programs, including M Countdown, Music Bank and Show! Music Core. The group further embarked on their first concert tour, titled Dimension 4 – Docking Station, which visited South Korea and Japan in January and February 2016, to promote the majority of the album and their past releases.