카카오엔터 글로벌 밴드 hrtz.wav(하츠웨이브), 강렬 '모멘텀'으로 돌아온다..9월 9일 미니 2집 발매 - starnewskorea.com

According to STARNEWS' August 24, 2026 report, Kakao Entertainment announced that global band hrtz.wav (Hertz Wave) will release their second mini-album, The Second Wave: MOMENTUM, at 6:00 PM KST on September 9, 2026. The article notes this is their first release about five months after their April debut mini-album and that the group has begun rolling out a schedule poster followed by inquiry films, tracklist and image teasers, track previews, and music video teasers; member names listed include Yoon Young-jun, Rian, Dane, Kaiten, and Hagawa.