CALGARY - Subtlety is not Trans-Siberian Orchestra’s strong point.

The symphonic metal act from New York City is brash, bombastic and truly, utterly over-the-top.

And last night, TSO cemented their reputation as one of the most theatrical touring groups around with a visually stunning, if somewhat ridiculous production.

It’s been just over one year since they last played the Saddledome, but TSO were still able to attract a crowd of about 8,000 to the ’Dome with their unique style of prog rock and classical music-infused power metal.

If last night’s audience was any indication, TSO have one of modern music’s most diverse fanbases.

There were black-clad youths, whose iPods are probably loaded with Lamb of God and Children of Bodom sitting next to greying professionals, as well grade school-aged kids and their parents.

It’s not surprising though, since a Trans-Siberian Orchestra concert is more of a PG-rated Broadway musical than an edgy hard-rock gig.

Formed in 1996, Trans-Siberian Orchestra first became famous for their far-out interpretations of classic Christmas songs.

Composer Paul O’Neill’s idea to create rock-opera Christmas songs must have seemed bonkers at the time, but it has proven to be a highly successful enterprise.

TSO’s shows may not always sell out, but their tours still rake in millions. For many, it’s an fun and entertaining way to get into the holiday spirit.

It has to be said however, the cheese factor is off the charts.

I mean, it is was one of the most outlandish shows I have ever seen. Last night’s spectacle, which lasted more than two-and-half hours, was definitely divided into two different segments.

The first half focused on their reimagined holiday tunes, most of which came from their platinum-selling 1996 debut album, Christmas Eve and Other Stories. A deep-voiced narrator led the audience through a story about an angel flying across the universe.

Each monologue led into a different song, adding once again to the overall theatrical feel.

During the second half, TSO performed more of their classical oeuvre, including overblown tracks from their latest release, the decidedly non-Christmas-y Night Castle.

As silly as the whole show was, O’Neill and guitarists Angus Clark and Al Pitrelli (of Megadeth, Blue Oyster Cult and Savatage fame) should be commended for their amazing guitar work.

I’m generally not a fan of extended guitar solos or musicians showing off, but these guys do it with flair.

Joined by a stable of vocalists and solid musicians, Trans-Siberian Orchestra gave the crowd exactly what they wanted — an awe-inspiring feast of pyrotechnics, laser lights, explosive sound, humour and musicianship.

I guess a rock-opera Christmas recital isn’t such a crazy idea after all.