The first discrete-transistor audio amplifiers barely supplied a few hundred milliwatts, but power and audio fidelity gradually increased as better transistors became available and amplifier architecture evolved.
O primeiro transistor discreto de son amplificaba apenas uns poucos centenares de milivatios, pero a potencia e a alta fidelidade fixérono aumentar gradualmente e así dispúxose de mellores transistores e de arquitecturas de amplificación evolucionadas.