Pentatonix changed the a cappella world when they burst onto the scene in 2011, winning season three of NBC's The Sing-Off. While many vocal bands fade after winning reality television, this quintet built a massive global audience through creative YouTube covers and multi-platinum albums. Yet, the group hasn't remained entirely static. Understanding the evolution of the Pentatonix lineup clarifies how they transitioned from a college-town trio into an international vocal powerhouse with a single major personnel shift.
The core of Pentatonix has shifted only once in its history, moving from its original foundational lineup to the modern five-piece configuration featuring Matt Sallee. Examining how the group formed, why Avi Kaplan departed, and how Matt Sallee seamlessly integrated reveals the structural backbone of modern a cappella success.
The Origins: High School Roots and The Sing-Off Win
Long before they sold out arenas, the group started in Arlington, Texas. High school friends Scott Hoying, Mitch Grassi, and Kirstin Maldonado sang together as a trio and entered a local radio competition to meet the cast of the television show Glee. Though they didn't win that specific contest, the experience planted the seed for a larger vocal ensemble.
When auditioning for The Sing-Off in 2011, the trio realized they needed a deep bass voice and a beatboxer to fill out a competitive sound. Through mutual connections, they brought in Avi Kaplan, a celebrated vocal bass from California, and Kevin Olusola, a cellist and beatboxer known for his innovative "celloboxing" technique.
This exact quintet—Hoying, Grassi, Maldonado, Kaplan, and Olusola—recorded their early viral hits, won The Sing-Off, and secured multiple Grammy Awards with tracks like their viral Daft Punk medley. For six years, this lineup defined the group's signature blend of soaring lead vocals, bright harmonies, crisp percussion, and deep bass grounding.
The Turning Point: Avi Kaplan's Departure in 2017
In May 2017, the group announced that bass vocalist Avi Kaplan was leaving. The rapid pace of international touring had taken a heavy toll on him. In emotional video announcements released to fans, Kaplan explained that the constant motion of the music industry left him exhausted and separated from his family and roots.
His departure created an immediate crisis for the band. In a vocal group, the bass provides the fundamental frequency that holds every chord structure together. Losing a foundational voice like Kaplan's meant the remaining four members had to decide whether to disband or find a replacement capable of matching his rich timbre and stage presence.
They chose to continue. The group embarked on a global tour shortly after the announcement, utilizing temporary arrangements while actively searching for a permanent successor who could handle both heavy bass duties and fit into the tight-knit personal dynamic of the band.
The Arrival of Matt Sallee and the Modern Era
In late 2017, Pentatonix introduced Matt Sallee as their new bass vocalist. Sallee brought a rich church choir background, strong musical theater training, and a warm, resonant lower register that gave the group a fresh sonic texture.
Rather than trying to directly mimic Kaplan, Sallee carved out his own distinct space within the ensemble. His integration was showcased on the 2018 release PTX Presents: Top Pop, Vol. I, where his vocal punch and smooth lower harmonies revitalized the group's arrangements.
The transition proved successful, allowing the group to maintain their rigorous recording schedule, holiday album traditions, and global tour footprint. Today, the lineup of Scott Hoying, Mitch Grassi, Kirstin Maldonado, Kevin Olusola, and Matt Sallee has remained stable for years, cementing this second era as the longest-running configuration in the band's history.
Why the Lineup Endures
Several factors explain why Pentatonix survived a major lineup change while other vocal groups dissolve after similar shifts.
First, the core trio of Hoying, Grassi, and Maldonado share a lifelong creative bond that anchors the group's identity. Second, Olusola's unique beatbox-cello style provides a rhythm section that remains constant regardless of who sings bass. Finally, the group embraces transparency with their fanbase, framing changes honestly rather than hiding behind corporate silence.
For more details on their official releases and current tour dates, check out the Pentatonix Official Website.
Frequently Asked Questions
Who are the original members of Pentatonix?
The original 2011 lineup consisted of Scott Hoying, Mitch Grassi, Kirstin Maldonado, Avi Kaplan, and Kevin Olusola.
Why did Avi Kaplan leave Pentatonix?
Kaplan stepped away due to extreme tour burnout and the physical and mental toll of the band's relentless global travel schedule, which kept him away from his home and family for extended periods.
Is Matt Sallee an original member?
No. Matt Sallee joined the group in late 2017 as the permanent replacement for Avi Kaplan after Kaplan's departure.
How many Grammy Awards has Pentatonix won?
Pentatonix has won three Grammy Awards, including wins for their arrangement of "Daft Punk" and "Dance of the Sugar Plum Fairy".
