Between 2014 and 2016, the ensemble produced two more studio albums and one live release. In the fall of 2017, Fire! Orchestra began rehearsing and researching a compositional structure with a brand-new acoustic line-up that emphasized strings and clarinets. In September 2018, Fire! Orchestra performed at Rune Grammofon as part of Sacrum Profanum Festival, invited by a renowned Polish conductor and composer Krzysztof Penderecki. The concert was subsequently released on Actions CD/LP in February 2020.

In January 2019, the orchestra recorded a new album at Rune Grammofon in Stockholm, released as Arrival CD/2xLP by Rune Grammofon in May of the same year.

Original line-up (2012)
Mats Gustafsson — tenor sax, live electronics, conduction
Anna Högberg — alto sax
Fredrik Ljungkvist — baritone sax, clarinet
Christer Bothén — bass clarinet, guimbri
Jonas Kullhammar — bass sax
Elin Larsson — tenor sax
Mats Äleklint — trombone
Emil Strandberg — trumpet
Magnus Broo — trumpet
Niklas Barnö — trumpet
Per Åke Holmlander — tuba
Mariam Wallentin — voice
Sofia Jernberg — voice
Emil Svanängen — voice, guitar
Andreas Söderström — guitar
David Stackenäs — guitar
Sören Runolf — guitar
Joachim Nordwall — electronics
Tomas Hallonsten — organ
Sten Sandell — piano, electronics
Johan Berthling — electric bass
Dan Berglund — bass
Joe Williamson — bass
Joel Grip — bass
Andreas Werliin — drums
Johan Holmegard — drums
Raymond Strid — drums
[url=https://discogs.com/artist/507659]Thomas "Mera" Gartz[/url] — drums

Arrival! "acoustic" line-up (2017)
Mats Gustafsson — baritone sax
Per 'Texas' Johansson — contrabass and bass clarinets
Christer Bothén — contrabass and bass clarinets
Isak Hedtjärn — Bb clarinet
Susana Santos Silva — trumpet
Mariam Wallentin — voice
Sofia Jernberg — voice
Anna Lindal — violin
Josefin Runsteen — violin
Katt Hernandez — violin
Leo Svensson — cello
Alexander Zethson — piano
Mikael Werliin — sound
Johan Berthling — basses
Andreas Werliin — drums

Live line-up (September 2018)
Mats Gustafsson — baritone sax and conduction
Per 'Texas' Johansson — tenor sax, clarinet and flute
Anna Högberg — alto sax
Christer Bothén — bass clarinet
Goran Kajfes — trumpet
Niklas Barnö — trumpet
Susana Santos Silva — trumpet
Per Åke Holmlander — tuba
Maria Bertel — trombone
Alexander Zethson — Hammond organ
Reine Fiske — guitar
Elsa Bergman — double bass
Torbjörn Zetterberg — electric bass
Andreas Werliin — drums

Céline Grangey — live sound