Formation (1993–1996) In 1993, Seksan Sukpimai was playing in various bands in
Nakhon Sawan province while studying at Nakorn Ratchasima Technical College. Later in 1997, Loso released
Red Bike as the
soundtrack album to the film
Red Bike Story starring by
Mos Patiparn and
Tata Young. Commercially,
Entertainment is the band's best-selling album to date, it achieved sales of over two million copies in Thailand and earned Loso the Season Award, Thailand's annual rock awards, for
Best Group in 1999.
Rock & Roll to The Red Album (1999–2001) In 1999, Rath left Loso for personal reasons, causing Loso to stop touring and go on hiatus for a period of time. They eventually returned to the studio with as a two-man band working with
Silly Fool's producer Simon Henderson to produce their third album,
Rock & Roll. Sales of the album exceeded one million copies. Following the release of
Rock & Roll, bassist Nattaphon "Klang" Suntharaanu joined as a temporary member. In February 2001, Loso released the fourth album
Losoland. Sales of the album exceeded only 700,000 copies. Six months later, Loso released the fifth album called
The Red Album in August 2001, so named at the recommendation of Paiboon Damrongchaitham, Chairman of the Board of Directors of GMM Grammy, with an album cover designed as a symbolic expression against the pirating of CDs and tapes in Thailand.
The Red Album included unreleased songs from the previous albums with only a few newly composed songs. The opening song of the album is "Pan Tip", a song written by Sek that ridiculed and satirized the Pan Tip Plaza, a popular venue for the sale of pirated CD tapes in Thailand at that time. Sales of
The Red Album exceeded 900,000 copies. Following the release of
The Red Album, "Rath" Sukkhajitr returned to the band after an absence of almost three years. Three months after the release of
The Red Album, Loso's first concert,
Concert For Friends, was held on 10 November 2001 at Velodrome Hua Mak stadiums.
Dispersed (2002–2019) After the big concert, Loso continued gigs until January 2002. Loso ceased touring, and in 2003 Sek announced that Loso had disbanded and separated so that he could continue his studies in England. After returning to Thailand, Sukpimai released a special album with
Thongchai McIntyre ("Bird") titled
Bird-Sek in 2004, to celebrate the 20th anniversary of GMM Grammy.
Bird-Sek achieved the highest album sales of the year in Thailand at two million copies. Afterwards, Sukpimai continued to tour and record as a solo artist. Following Loso's breakup, Yai and Rath formed the band
Fahrenheit together with Pichet Krueawan, a guitarist and former members of Y not 7, and Piraporn "Zai" Prampanas as lead vocalist. Sukkhajitr left Fahrenheit and retired from music shortly afterward due to health problems. Yai, in addition to his work with Fahrenheit, became the drummer for
Asanee-Wasan and a
session musician. Suntharaanu joined the band Pon La Lak Ruk Oei, and when that band disbanded, he worked as a sound engineer and pursued other business interests.
Reuniting (2019–2025) On 10 October 2019, Sek posted a picture of himself with former bandmates Yai and Rath. The image sparked hope that the band might reunite after 17 years. Then, on 12 September 2020, Loso members Yai, Rath and Klang attended the wedding of Sukpimai and Karn Wipakorn, where the bandmates joined together to perform for the wedding party. On 18 December 2021, Loso performed the
LOSO Reunion Live Streaming concert, their first concert in 20 years. Since 2022, Loso has returned to touring throughout Thailand with members Sek, Yai and Klang. Rath has been unable to rejoin the band due to health concerns.
Hiatus (2025–present) After the supreme court verdict lead to Sek's incarceneration for 2 years and 12 months without suspension, the band forced to gone hiatus. ==Musical influences and impact==