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

What kind of group is f(x)?

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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

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Luna

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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

WOW KOREA

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

WOW KOREA

Sulli

WOW KOREA

About the 4 Walls Random Jacket Ver and Hot Summer Albums

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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.

TOWER RECORD

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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“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).

DIMENSION 4 – Docking Station

Fan Site

“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)

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Japan（Tokyo）

UREPIA

Value and Features of the CD Set

f(x)’s Popular Albums

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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

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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.

Electric Shock

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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).

Red Light

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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.

Related Products

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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

f(x) Official Website

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

K-pop Korean Wave Shop

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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