Answer: The Tandy TRS-80 Model I
Early computers lacked discrete sound cards / modules and often did not even sport a simple on-board PC speaker. That didn't stop early PC enthusiasts from enjoying sound, however indirectly and unintentionally, with an early model personal computer.
The Tandy TRS-80 Model I was manufactured by the Tandy Corporation and sold by RadioShack from 1
The Model I was poorly shielded and generated such high levels of radio frequency interference that placed a radio near the unit created quite an array of sound effects. The interference-driven sound effects clearly did not align themselves with most applications, but were a surprisingly good match for early space-based games.
Although the model was a popular one, ultimately selling over 200,000 units, it was removed from The market in 1981 due to aging hardware and FCC regulations on radio-frequency interference that would require significant design changes.