When a band is named after a piece of clothing that covers your penis and has a myspace URL that ends “fuckfalsemetal”, you’d be forgiven for thinking you could guess pretty much what Iron Balls of Steel might sound like. Add to that the album name, and if you’ve never heard Loincloth before, some pretty familiar tropes might come to mind.

Partly that’s because metal is a much under-appreciated genre. At least, it’s appreciated by its fans, but rarely escapes its genre-trappings in order to become simply ‘music’ in the way that rock, or indie or pop music do. However good metal is, some people (metal fans aside) still think of it as “good metal” and not “good music”. So anything that comes out of this massive and diverse genre, to a non-metaller, is – well, something like being named after a genital-covering garment owning a page called “fuckfalsemetal”.

Metal (and music) is more complicated than that. Iron Balls of Steel has more in common with bands like Battles than it does with Metallica; its main pull is rhythmic, its tricks are tied to production. There’s a reason why Loincloth have been described as “math metal” – and are kinship with Battles, a familiar example of math rock, makes sense.

See first track ‘Underwear’. Two rough chords sound in triplets, the first twice, the second once; but after the first two bars one of the three is played lower in the mix (as well as panned “further out”, towards the left or right channel), and the drums drop in and out, creating a beguiling, and damn loud expanse. It’s luxurious. Iron Balls of Steel is to be revelled in, and the same techniques crop up across its sixteen tracks. ‘Hoof-Hearted’, maybe the most layered track, pelts you with picked trebly guitars; ‘The Moist Listener’ carries that slightly-syncopated drum motif. Around them, tightly knitted drum and guitar parts rumble and roll.

Because Iron Balls of Steel is loud, even when it’s quiet. It whizzes by pretty quickly – and the tonal similarity in many of its tracks, plus the stop-start rhythms, sometimes makes it hard to decide where songs begin and end.

That’s the only major criticism here: similarity. Iron Balls of Steel is arresting, complex. To say so isn’t an apology for metal – plenty of it is arresting, diverse, complex. But sometimes, maybe, people forget that.