In front of judges Chris Mac (Six60), Jeff Newton (NZ on Air), Elizabeth Stokes (The Beths), Hamish Jackson (NZ Rockshop) and Anna Coddington, Arlo Mac exuded confidence, cohesiveness and joy.
Newton said: "Within their music they took their songs on a bit of a journey and melded the genres, styles and time signatures."
It means the little band that could joins a who's who of Kiwi music royalty.
Musical successes from Smokefreerockquest over its 30-year history include Broods, Leroy Clampitt, Kimbra, Aaradhna, Opshop, Evermore, Ladyhawke, Kids of 88, Die!Die!Die!, Joel Little, Tiny Ruins, Marlon Williams, Brooke Fraser, Anika Moa, Chelsea Jade, Nadia Reid, Aldous Harding, Steriogram, Phoenix Foundation, Devilskin, The Black Seeds, Bic Runga, and The Naked and Famous.
Band frontman and Year 12 student Harry Mason said performing on the national final stage with Joe Ledword (bass, Year 12), Thomas Grant (drums, Year 12), and Benjamin Bush (guitar, Year 11) was a moment of euphoria.
"There were nerves but once we got on stage we were ecstatic," said Mason, vocalist and guitarist.
"In the band we all have different personalities and different genres of music we listen to. When we come together we create something quite different, and we love it."
For Ledword it was the crowd's atmosphere and the chemistry between band members which spurred him on.
"We felt so good. Playing up on the stage, the atmosphere of the crowd, jumping around, dancing around was great.
"We all had good chemistry between us up on the stage."
The win opens up exciting times for the youngsters.
They are set to star in a "proper" music video with TVNZ and record a song officially in the school holidays, Ledword said.
They also receive $10,000 in musical equipment from the Rockshop, plus an $8000 recording and NewTracks grant from NZ on Air and a branding package from Imaginary Friends.