Appraised as “very well-polished in tone and style” by the world's best loved a cappella ensemble The King's Singers, and as “The Hong Kong equivalent of the Swingle Singers!” by Japanese media, The Sregnis Singers is the first and one of the very few classical-style a cappella ensembles in Hong Kong.

Established in 1994 by 10 enthusiastic musicians, The Sregnis Singers has been singing in 'King's Singers' style'.  With lots of classical choral works in its repertoire, it also does orchestral transcriptions and pop songs.  Unlike the 6-part King's Singers, Sregnis Singers normally has 9 singers, with two altos and one mezzo-soprano, but it also does SSAATTBB in some occasions.

The Sregnis Singers is also known for frequently performing works from local contemporary composers. It has premiered works by Doming Lam, Joyce Tang, Samuel Tam, Julian Chan, Issac Hui, Li Cheong, Eric Tse and Viola Yuen, to name a few.

The Sregnis Singers was one of the Hong Kong representative teams in the Xi’an International Horticultural Exposition. It participated in Professor Victor Chan’s project in recording the “Chung Chi College 60th Anniversary Celebration Theme Song”. It also took part in pop singer Sammi Cheng’s album as a group of backup vocalists.

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「合唱俠」成立於1994年，是本港第一隊無伴奏小組合唱組合 (a cappella ensemble) ，也是本港極少數的古典派無伴奏合唱組合，獲享譽全球的 King’s Singers讚譽為「音色、風格皆十分精煉」，又獲日本傳媒讚譽為「香港的Swingle Singers」。

「合唱俠」由十位熱愛小組合唱的音樂家創立，走 King's Singers 的路線，曲風和唱腔都是古典風格，classical choral 的味道強烈。一般編制是五女四男SSAAATTBB，加強了女中低音的比例，有時也會是四女四男SSAATTBB，跟六人的 King's Singers不同。選曲方面除了 King's Singers 的編曲作品、本地當代嚴肅作品外，也有一些影視改編作品和流行歌曲，跟以唱流行歌為主的本地無伴奏界別有所不同。

「合唱俠」是本地當代無伴奏合唱作品主力演出者及推廣者，曾首演多首本地無伴奏作品，包括「香港新音樂之父」林樂培、鄧慧中、譚展輝、陳玉彬、許德彰、李昌、謝建銓及阮慧玲的世界首演作品。

「合唱俠」曾應特區政府邀請，代表香港參與「西安國際園藝博覽會」表演；曾獲陳偉光教授邀請，灌錄中文大學崇基學院六十週年「崇基頌歌」；曾參與無線電視劇 “4 in Love”的配樂錄音；也曾替流行歌手鄭秀文和音。