The Rotorua band also won the Grade 4B street march, and the Grade 4B drumming aggregate.
The band's tenor and bass came ninth out of 26 in the Westpac Cup section and young band member Crawford Johnson-Ronald came first place in the Mace Flourishing Finals.
Clark said this was Crawford's first year attending a national competition, and the smile on his face was huge.
He said it was a successful weekend for the band.
"They were absolutely ecstatic because we weren't really expecting it. We had high hopes, but weren't really expecting it.
"We have 16 members under the age of 20, it's a very youthful band, so to do that well with many young people is quite special."
Clark said the band appreciated the funding it had received from the One Foundation for accommodation.