The speaker amplifier described in this article can be used to amplify the audio signal output from the pocket radio , to drive the speaker to play, to obtain better sound effects, and to be used by listeners who already have ordinary desktop AM radios, without changing the original radio. Next, as an auxiliary channel, it produces analog stereo. Although the analog stereo is not as good as true stereo, but for the lack of high-frequency stereo listening conditions, as a stopgap, it only improves the listening at a small price. effect.
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