At first sight, you could be forgiven for being slightly underwhelmed by the appearance of the Teufel THX Select2 Cinema set.

You get two whacking great cartons with full-size subwoofers inside (hooray) and five speakers no bigger than the regular bookshelves you might find in a kid's room (not hooray).

Looks-wise, they are pointy and ugly and, despite the addition of some brushed metal bits, look cheaply-made. Of course, thinking like that is to miss the point in a big way, for these wear an 'I'm dead 'ard, me!' badge – otherwise known as a THX logo.

Started, as the THX company now says, 'by a maverick director', THX was the brainchild of George Lucas, with audio whizz Tomlinson Holman being his main man. These days both George and Tom are no longer directly involved, but THX forges ahead.

Its new versions of the 'Big Room' and 'Smaller Room' THX programs (which sprang from the original) are called THX Ultra2 and THX Select2, with Select2 intended for rooms up to two thousand cubic feet and viewing distances of ten feet. The Ultra2 specification is for the sort of bigger living space you find in American houses. There's even a THX spec limits musically.

Part of the new THX Select2 spec is a range of new codecs, including one called THX Music, so it is possible that these speakers would sound better with music had I got a THX S2 front end. But I found a sibilance and softness that was definitely an artefact versus what purity I knew to be on the disc.

But the business of these boxes is film soundtracks. I slapped Dark Knight into the my Blu-ray deck and settled down for the ride...

Filmed in large chunks in the IMAX format, the soundtrack of Dark Knight has a serious level of difference between quiet parts and the most literally explosive. As the film begins, you get quiet and tinkly sounds, followed by a big smash, as the crooks set up a wire from one building to the next.

The performance capabilities of the Teufel system suddenly became clear. Like a full set of bike leathers that make their owner look silly whilst doing the weekend shop, but badass when the dude is on his Ducati, these speakers, once fed a good slice of power, came to life and absolutely stonked.

All that the THX certification implies is in there. Great directionality, superb placement of sounds around the room due to excellent off-axis performance, and a bass-end that is literally stupefying. However, the main five speakers do not seem that efficient, and I needed to crank ten per cent more than I normally would to get the satisfying reference level.

At this point, the two 12in subwoofers, which had been left at the little mark that says 'THX' on the gain knob's marking, had to be turned down a touch by way of the LFE level from the remote. With that sorted, it was back to the film and, as the villains got offed one by one in the early sequences, I was beaten into joyful jelly – metaphorically speaking.

Teufel system 5 thx select2

When Batman thudded down onto the roof of an escaping van, I was almost lifted out of my seat. The system can go loud from quiet effortlessly. I also loved how well the subwoofers blended with the small speakers, without any trace of a 'hole' between the two sorts – impressive considering the size of the surrounds.