In 1972, Joseph "Jo Jo" Hoo Kim spent $38,000 on an API studio console and opened a recording studio on Maxfield Avenue in the heart of west Kingston. He had no prior production experience. His brothers Ernest, Paulie, and Kenneth had been running juke boxes and slot machines across Jamaica until the government outlawed gaming machines, and the family's entrepreneurial instincts needed somewhere new to land. What Jo Jo built in that converted space at 29 Maxfield Avenue, Kingston 13, would become the most consequential recording environment in reggae's classic era, a studio that didn't just document the music of its time but physically invented the sound that made roots reggae feel the way it does.
The early strategy was simple and smart. Jo Jo had been taken to visit Dynamic Sounds studio in Kingston by singer John Holt, and what he saw convinced him he could build something better. He offered producers free recording time in the first months to build a client base. Among the first to take him up on it were Bunny Lee and Phil Pratt. Phil Pratt's session with Gregory Isaacs, "All I Have Is Love," gave Channel One its first number-one hit. Bunny Lee brought Delroy Wilson. The studio was earning its reputation one session at a time, with brother Ernest running the engineering desk and Paulie managing the associated Well Charge sound system. But the distinctive Maxfield Avenue sound, the one that would redraw the map of Jamaican music entirely, didn't arrive until the Hoo Kims assembled their own house band in 1975.
They called them the Revolutionaries, and the name was not modest. The lineup gathered some of the finest session players in Kingston: keyboardist Ansel Collins, guitarists Radcliffe "Dougie" Bryan and Earl "Chinna" Smith, horn players Tommy McCook, Vin Gordon, and Herman Marquis. But the engine of the whole operation was the rhythm section. Drummer Lowell "Sly" Dunbar and bassist Robbie Shakespeare had first played together in 1974 on a session at Channel One for producer Bunny Lee, and when they began working the Maxfield Avenue room regularly, something shifted. Sly spent full days with engineer Ernest Hoo Kim experimenting with the drum sound, doubling rim shots beneath flying cymbals, clapping the snare beneath certain bass notes, building a texture that was simultaneously heavier and more propulsive than anything roots reggae had previously produced. The result was the rockers style, a rhythmic approach that departed from the traditional one-drop beat and gave reggae a new urgency, something closer to a declaration than a meditation.
The moment that announced the new sound to the world arrived in 1975, when the Mighty Diamonds recorded what would become their debut album. Donald "Tabby" Shaw, Lloyd "Judge" Ferguson, and Fitzroy "Bunny" Simpson were a harmony trio from Kingston who had modelled their vocal approach on American soul groups like the Stylistics and the Chi-Lites, and who brought that sweetness directly into contact with Rastafarian lyrical fire. Joseph Hoo Kim produced the sessions at Channel One. The album, "Right Time," was released in 1976 on Virgin Records after the label came scouting in Jamaica, and it landed as a landmark. The title track opens with Sly Dunbar's double tap on the snare rim, a drum figure so unexpected that listeners assumed it was a studio trick. Sly later recalled that when the Diamonds laid their vocals onto the rhythm he had built, he went back to Channel One to hear the playback and said simply: "This is wicked." The song came out and was immediately a hit. Robert Christgau gave the album an A-minus. Critics who studied it heard the rockers rhythm and understood that something had changed at a structural level in Jamaican music.
The Revolutionaries' backing tracks became the foundation on which Kingston's most serious vocal groups built their arguments. The studio's roster in the mid-to-late 1970s reads like a roll call of roots reggae's most essential voices: Horace Andy, the Wailing Souls, Leroy Smart, and Jimmy Cliff, whose "Follow My Mind" album was recorded there. The rockers sound spread outward from Maxfield Avenue with a speed that reflected how right it felt for the moment. Reggae's spiritual and political weight, the music's insistence that Babylon would fall and that Jah's time was coming, found its ideal rhythmic vehicle in a beat that pushed forward rather than settled back. Sly's drum patterns carried a militancy that matched the lyrical content note for note. The studio's crisp, bass-heavy production aesthetic, shaped by Ernest Hoo Kim's engineering and the room's 16-track console, gave the music a clarity that let the message cut through.
What makes Channel One's story worth sitting with is the particular texture of how it came together. The Hoo Kims were not Rastafarians. They were Chinese-Jamaican entrepreneurs from the Maxfield Park neighbourhood who had grown up listening to sound systems and who understood, with a clarity born of proximity, that the music being made around them had commercial and artistic potential that the existing studios were not fully capturing. Jo Jo's decision to offer free sessions in the early days was a business move that became a cultural one. By giving producers and musicians access to the best-equipped room in west Kingston without asking for anything upfront, he created the conditions for experimentation that produced the rockers sound. The musicians who walked through that door brought the spiritual weight. The studio gave them the space and the equipment to let it land. Sting and the Clash both visited Maxfield Avenue to try to absorb what was happening there. The rhythmic vocabulary that Sly and Robbie developed in that room traveled outward through their subsequent work with artists across genre lines, carrying the Channel One logic into music made far from Kingston. Jo Jo Hoo Kim died in New York on September 20, 2018. The studio on Maxfield Avenue has been dormant for years. The sound it made is still running.
