| 摘要 |
<p>An active sound box using electron tube and the application of the active sound box, including a box, an amplifier, a speaker, the amplifier is mounted on a circuit board, that includes at less one electron tube which used in signal amplification, power amplification, and signal display. The electron tubes are mounted on the circuit board through the pins, and expose the electron tube globes to the outside through the throughhole forming in one of the outer surfaces of the box or mount the electron tubes directly in one or multi surfaces of the box. The sound box uses the electron tube for the preamplifier and the power amplifier and the signal display so that the sound from the speaker is characteristic of the imitation sound, and sounds much smoother, and more natural, and more Hi-Fi. This active sound box may connect directly to the audio output port of an audio card of a computer, may also connect to the audio output port of a CD, MD, MP3, DVD, or other apparatus with audio output. The sound box with exposing the electron tube outside, the electron tube is flashing at work, and is sparkling and crystal-clear when it is not at work, which enhances the decorate of the sound box. Compared with the conditional connecting, the connecting of the sound box is more compact.</p> |
