Distinctly better than the boom box, and the tuner is much better, too. Maybe a mini guitar speaker? But it sounds really good through the hi-fi speaker. About what one might expect from a table radio speaker, but it's an AlNiCo driver. Sounds okay with its original speaker, if a bit heavy on the low mids. Then I drilled a hole in the back and installed a speaker out jack. As old as it is, I wasn't sure how well a mere cleaning would work, but it worked very well indeed. Took off the back and sprayed it with DeOxit, and cleaned it right up. On/Off switch is ganged with the volume pot, so there's no way to set the volume and forget it. And when I say old table radio, I mean old. I always figured that a good cleaning was all it needed, but it's been on a shelf, unused, for some twelve or fifteen years. We used to use it, but it reached a point where the volume control was so scratchy that it was practically useless. At one point, she mentioned her old table radio.

In order to have a radio, I hijacked my wife's portable boom box, and wired a cord from the headphone output to a high efficiency high fidelity speaker.

Background: a while back, I blew out the tuner on my receiver.