The speaker makes a horrible noise and the power button won't turn off.

A static and low buzzing noise is produced when using Bluetooth feature, even when the two devices being paired are very near one another

Within a few months, the sound quality has deteriorated dramatically, and now the volume along with all the weird noises underlying the main audio renders it a useless, noisy annoyance.

I had already printed return labels for this CD player due to it developing a scratchy static noise when turned on regardless of what function setting it was in.

Made strange buzzing noises.