What makes 4 Walls by f(x) notable?

'4 Walls' received critical acclaim for its experimental sound and production, achieving a top position on various international charts. It not only solidified f(x)'s reputation as one of K-pop's most adventurous acts, but also influenced subsequent artists seeking to explore more avant-garde pop aesthetics. Released on October 27, 2015, '4 Walls' is f(x)'s fourth studio album, following their successful third album, 'Red Light'. At this point in their career, the group was establishing themselves as innovators within the K-pop genre, consistently pushing boundaries both sonically and visually.

4 Walls works well if you're into steady mid-tempo groove throughout, ethereal melodies for reflective moments and for upbeat social gatherings.

How many songs are on 4 Walls?

4 Walls has 10 tracks, running approximately 35 minutes.

Released 11 years ago this October

4 Walls

f(x) · 2015

35 min · 10 tracks · K-pop

A shimmering blend of synth-pop and electropop that balances ethereal melodies with sharp, rhythmic beats.

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Top tracks — play these first

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4 Walls — The title track embodies the album's experimental spirit with its intricate production and haunting vocals, setting the tone for the entire project.
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Rude Love — This track stands out for its bold lyrics and catchy hook, showcasing f(x)'s ability to blend playful themes with an infectious electropop sound.
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Glitter — With its vibrant energy and danceable beat, 'Glitter' highlights the group's versatility while delivering a euphoric listening experience.

Elevation

Our rating, out of 100 — and why.

AI-generated from five scored dimensions. An opinion, not a measurement.

63 /100

Treeline

Higher than 74% of albums we've rated

The album showcases innovative production and strong vocal arrangements, solidifying f(x)'s unique place in K-pop.

What we noticed

The album opens with the title track, which features layered synths and a gradual build-up, setting a dreamy tone that persists throughout.
Tracks like 'Rude Love' and 'Diamond' incorporate intricate vocal harmonies that play off the electronic production, creating a rich texture.

Composition 25% of the score: 7/10
Craft 20% of the score: 8/10
Durability 25% of the score: 6/10
Distinctiveness 18% of the score: 7/10
Sequencing 12% of the score: 8/10

Influence 6/10

Significant within its genre. Reported but not counted — how far a record travelled describes its reception rather than the record, and a newer release has had less time to travel than an older one.

Is this for you?

Good fit if you like

steady mid-tempo groove throughout
ethereal melodies for reflective moments
for upbeat social gatherings
catchy rhythms for spontaneous dancing

Maybe skip if you

prefer instant gratification tracks
dislike cohesive listening experiences

Where this album fits

Career context: Released on October 27, 2015, '4 Walls' is f(x)'s fourth studio album, following their successful third album, 'Red Light'. At this point in their career, the group was establishing themselves as innovators within the K-pop genre, consistently pushing boundaries both sonically and visually.
Stylistic neighbors: Girls' Generation· Red Velvet· 2NE1

Moments worth listening for

Where the writing does something specific.

When I'm Alone

The song shifts from a reflective tone to an empowering declaration of self-acceptance.

This transition underscores a narrative of growth and independence, contrasting vulnerability with strength.

Tracklist

Best experienced from track one — press play and let it unfold.

1 4 Walls 3:27
2 Glitter 2:59
3 Deja Vu 3:40
4 X 3:23
5 Rude Love 4:18
6 Diamond 3:59
7 Traveler 3:38
8 Papi 3:05
9 Cash Me Out 3:21
10 When I'm Alone 3:23

What to play next

Listen next

4 Walls

2015

Go back to

Red Light

2014

Full f(x) discography Artists like f(x)

K-pop electropop synth-pop

Reference: Wikipedia · MusicBrainz · Wikidata