f(x) was a group that stood out among second-generation K-pop acts with their highly artistic visuals, setting them apart from others. Now that the group is effectively inactive, their albums and official merchandise from that era have become increasingly rare and valuable.
In this article, we will take a closer look at the “f(x) 4 Walls Random Jacket Ver Korea Press Edition & Hot Summer Album CD Set,” a collection that allows you to enjoy their works all at once.
About the f(x) 4 Walls Random Jacket Ver Korea Press Edition & Hot Summer Album CD Set
The “f(x) 4 Walls Random Jacket Ver Korea Press Edition & Hot Summer Album CD Set” is a CD collection that allows you to enjoy two of f(x)’s most popular albums, Hot Summer and 4 Walls, all in one set.
From the album featuring their early hit “Hot Summer” to the highly refined and critically acclaimed 4 Walls, this set captures the full range of f(x)’s appeal. It is recommended not only for new listeners who are just discovering their music, but also for longtime fans.
What kind of group is f(x)?
f(x) is a K-pop girl group that debuted in 2009 under the major South Korean entertainment company SM Entertainment. The group consisted of five members—Victoria, Sulli, Luna, Krystal, and Amber—and gained attention for their unique music and concepts, driven by their multinational lineup.
Known for their distinctive style centered on electro-pop and dance music, they produced hit songs such as “Hot Summer,” “Electric Shock,” and “4 Walls.” They were widely loved by fans around the world as one of the representative groups of the second generation of K-pop.
Following member departures, the group effectively disbanded in 2021.
Below is an introduction to the members.
Victoria
She is originally from China and served as the leader of the group.
She is highly skilled in dance, known for her graceful and expressive performances.
Currently, she is active mainly in China as an actress and television personality.
Luna
She was the group’s main vocalist, known for her outstanding vocal ability, stable high notes, and strong expressiveness.
Currently, she is active on stage, particularly in musicals.
Krystal
She was known for her cool and sophisticated visuals, with a well-balanced ability in both singing and dancing.
She was also popular as a fashion icon.
Currently, she is active as an actress as well.
Amber
She is originally from the United States and was known for her skills as a rapper.
Currently, she is a multilingual artist fluent in English, Korean, and Chinese, and is active on a global scale.
Sulli
She is a member from South Korea who gained popularity for her clear, delicate visuals and natural charm.
She went on hiatus in 2014 and left the group in 2015.
After her departure, she continued her career as an actress.
About the 4 Walls Random Jacket Ver and Hot Summer Albums
In this section, we will explore the 4 Walls Random Jacket Ver and Hot Summer albums, including their details and key features, as well as live performances where the tracks were showcased.
By learning which stages featured each song and how they were performed, you can gain a deeper appreciation of f(x)’s charm—beyond what can be experienced through the recordings alone.
About the 4 Walls Random Jacket Ver and Hot Summer Albums
The “4 Walls Random Jacket Ver” is a special edition of f(x)’s fourth full-length album,
4 Walls, released in 2015.
This album features different jacket versions for each member, and one of its unique charms is that you won’t know which design you’ll get until you open it.
As a result, many fans collect multiple versions, making it a highly collectible and popular item among K-pop albums.
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About the Hot Summer Album
“Hot Summer” is one of f(x)’s most popular songs and serves as the title track of their 2011 repackaged album.
It is an energetic dance number inspired by summer, featuring a catchy melody and a refreshing concept. The song gained strong popularity from the time of its release.
The album that includes “Hot Summer” is also highly regarded among collectors and K-pop fans, as it captures the early charm of f(x).
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DIMENSION 4 – Docking Station
“DIMENSION 4 – Docking Station” is one of the live tours where songs from both the 4 Walls Random Jacket Ver and the Hot Summer album were performed.
Held across various cities in Asia in 2016, this tour marked f(x)’s first solo concert and was known for its highly polished stage, centered around tracks from 4 Walls.
It is also highly regarded among fans as a rare concert performed by the four-member lineup following Sulli’s departure.
Korea (Seoul)
Venue: Olympic Hall, Olympic Park
Dates: January 29–31, 2016
Held over three days, the concert featured highly refined production and a well-crafted setlist, with an electrifying atmosphere fueled by passionate fans. Tickets sold out immediately from the first day, and there were many emotional moments, including scenes where the members were moved to tears. This concert is also known for serving as the foundation for the structure of the subsequent tour.
Japan（Tokyo）
Venue: Ariake Coliseum
Date: February 20, 2016
The Tokyo concert was based on the Seoul performances, with an even higher level of refinement and production quality. It featured an immersive stage centered around the world of 4 Walls, along with popular songs that created a strong sense of unity with the audience.
With Japanese MC segments and fan service, the concert was especially memorable for the close connection between the members and the audience.
Value and Features of the CD Set
This CD set allows you to enjoy two of f(x)’s most popular albums, 4 Walls and Hot Summer, in one collection.
Since it includes albums from different periods of their career, one of its key features is that it offers a wide range of f(x)’s musical appeal—from their early songs to their later, more refined works.
Additionally, as it is an official Korea Press Edition CD, it holds strong value for both K-pop fans and collectors.
As a collection that brings together these popular albums, this CD set is highly recommended not only for f(x) fans but also for anyone looking to build a K-pop album collection.
f(x)’s Popular Albums
f(x)’s representative works—Pink Tape, Electric Shock, and Red Light—are iconic albums, each with its own unique appeal, and they continue to be loved by K-pop fans to this day.
Below, we will introduce the details of each album.
Pink Tape
Released in 2013, this album is widely regarded as one of f(x)’s signature works.
With its highly artistic concept and music, it is considered a classic masterpiece among K-pop albums.
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Electric Shock
Electric Shock is the group’s second mini album, released in 2012.
The title track, “Electric Shock,” features a powerful electro sound and an addictive melody, gaining significant popularity at the time of its release.
The album as a whole is filled with pop and energetic tracks, and it is highly regarded among K-pop fans as a work that captures the early charm of f(x).
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Red Light
Red Light is f(x)’s third full-length album, released in 2014.
It is known for its electro-pop and dance-based tracks, along with a unique and highly artistic concept that strongly showcases the group’s musical identity.
The title track, “Red Light,” gained popularity for its powerful beat and striking performance, and it received high recognition on Korean music charts at the time of its release.
Overall, the album is highly polished and is regarded by fans as one of the representative works of the second generation of K-pop.
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Related Products
f(x) is now effectively disbanded, and as each member is active individually, the rarity and value of official goods and related items—beyond CDs—have been increasing year by year.
Below are some representative items.
Official Light Stick
The official f(x) light stick was a fan support item sold at their first solo concert, “DIMENSION 4 : Docking Station,” held in 2016.
As it was a concert-exclusive item, the number in circulation is limited, and it is now widely recognized as a highly sought-after collectible among K-pop fans and collectors.
f(x) “Electric Shock” Official T-shirt
The official T-shirt released in 2012 is rare due to its limited circulation. Its value varies depending on the condition and whether the original tags are included, and it is now in high demand among collectors as a vintage K-pop item.
Conclusion
The “f(x) 4 Walls Random Jacket Ver Korea Press Edition & Hot Summer Album CD Set” is a special collection that captures the unique appeal of f(x), a group that established its own distinct position in the K-pop scene.
From their early album featuring the iconic summer hit “Hot Summer” released in 2011 to 4 Walls (2015), which can be seen as the culmination of their artistry, this set allows you to experience f(x)’s musical evolution all at once.
The 4 Walls album comes in a random jacket version, adding an element of surprise as you discover which member’s design you receive—an especially appealing feature for collectors. Both albums are official Korea press editions, making them valuable K-pop items.
This set is highly recommended not only for f(x) fans but also for anyone looking to build a K-pop album collection.
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f(x) 4 Walls Random Jacket Ver Korea Press Edition &Hot Summer Album CD Set
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