Problem: In the PSUT8AE or PSUT8TE speaker, four of the loudspeakers are not working (half of the column is not producing sound).
Follow the steps below:
1. Loosen the grille by removing the panel under the speaker and unscrewing the five socket head screws;
2. Remove the grille;
3. Disassemble one loudspeaker at a time and test it with a 9-12V battery;
4. Re-assemble the working loudspeakers carefully, or where necessary request spare parts.

If, instead, the entire column doesn't work, you can test the speaker, at the ends of the connector, with a 9-12V battery: if the loudspeakers work, then the problem is with the amplifier channel, in which case you need to contact the technical support service.