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Introducing… B.U.M., the trio from Cádiz that proves GrungePunk is more alive than ever

Editor Music

5 de July de 2026

With members from Spain and the United Kingdom, B.U.M. has built one of the most authentic projects in the Spanish underground scene. Grunge, punk, metal, and alternative rock blend together in a genre-defying sound that continues to gain traction, spreading from Cádiz to the rest of Europe.

While much of contemporary rock strives to sound increasingly polished, B.U.M. continues to do exactly the opposite.

His music sounds rough.

Live.

Uncomfortable when it needs to be.

And deeply honest.

Based in Cádiz, though with roots spanning Spain and the United Kingdom, the trio—composed of Jimi, Cri, and, as of this year, Julio Guerrero—has spent several years developing a sound that draws on ’90s grunge, street punk, and the raw power of metal, yet doesn’t fully belong to any of those genres.

They themselves sum it up with a single word that perfectly defines their identity:

GrungePunk.

A band formed to break the silence

B.U.M. was founded in 2019, driven by a very simple need.

To write songs that spoke about reality without embellishment.

Far from grandiloquent rhetoric, the band found its identity from the very beginning in powerful riffs, fast-paced rhythms, and lyrics that depict personal conflicts, social frustrations, and the contradictions of our time.

That same year, they released their first self-titled EP, recorded with renowned producer Javier Rondán at Audiorama Studios, an essential landmark in Andalusian rock.

The release was accompanied by the music video for “Underground, “ filmed at Black Zoo Studios, making it clear from the start what the band’s DNA would be: energy, attitude, and zero compromises.

“The Infected” and an album released in the midst of the pandemic

While the world was in lockdown during the toughest months of the pandemic, B.U.M. decided to turn that uncertainty into songs.

The result was *The Infected*, published in 2020.

Far from being a concept album about lockdown, the album used the pandemic as a metaphor to address other, much more everyday “viruses”: manipulation, addiction, hypocrisy, and the dehumanization of society.

With 15 songs, the album showed a clear evolution from the debut EP.

Musically, there were influences from Seattle grunge, British punk, hardcore, alternative metal, and even subtle nods to ska and classic rock.

Songs like “Parasites” and “Polytoximania” perfectly captured that blend of powerful sound and social criticism that characterizes the band.

From the underground to reinterpreting Lady Gaga

One of B.U.M.’s most surprising moves came in 2024.

The group released “The Code, “ accompanied by a powerful music video, but also included an unexpected cover of Lady Gaga’s classic “Bad Romance” as the B-side.

Far from becoming a mere curiosity, the band managed to completely transform the song, taking it in a much darker, guitar-driven direction closer to grunge.

Yet another example of how any song can take on a new life when it passes through his sonic filter.

“The Revolution” and Natural Evolution

In 2025, *The Revolution EP* was released, an album that definitively cemented the band’s identity.

The production is more powerful, the compositions are more mature, and the band shows greater confidence in combining catchy melodies with bursts of energy typical of classic punk.

All of this without losing that DIY spirit that has always been a part of the project.

What exactly is GrungePunk?

Although they themselves use the term “GrungePunk,” it’s hard to define exactly what B.U.M.’s sound is.

There are riffs that are reminiscent of Nirvana.

Moments reminiscent of California punk.

Influences from European hardcore.

There are even echoes of British alternative rock.

The explanation probably lies in the very origins of its members.

They each come from very different music scenes.

Heavy metal.

Folk rock.

Ska-punk.

Classic rock.

And it is precisely that blend that ultimately results in a sound that defies any overly rigid labels.

New lineup, same intensity

The spring of 2026 marks a new phase for the group.

Following drummer Tood’s departure, B.U.M. has welcomed Julio Guerrero, a musician who brings an even more aggressive beat and renewed energy to both the band’s classic repertoire and the new material they are currently working on.

Recent concerts show that the change has not been a break with the past, but rather a catalyst for further evolution.

A live performance where everything makes sense

If there’s one thing that truly defines B.U.M., it’s their concerts.

His music seems tailor-made for the stage.

The songs take on a whole new dimension when the band connects with the audience, blending intensity, intimacy, and an attitude that evokes the most authentic essence of ’90s alternative rock.

There are no artifices.

There are no poses.

Just three musicians enjoying the volume.

And making sure the person in front of them has a good time.

LoffMusic’s opinion

In a scene where many bands try to sound like whatever algorithm is in vogue, B.U.M. continues to commit to something much more difficult: having personality.

Their blend of grunge, punk, metal, and alternative rock doesn’t set out to reinvent the wheel.

It seeks to revive a way of understanding music in which attitude matters just as much as the songs.

And that makes this trio from Cádiz one of the most interesting acts on the national underground scene.

Some people might label them as punk.

Others will talk about grunge.

They prefer to call it GrungePunk.

And, after listening to them, it’s hard to come up with a better definition.