Classic intermittent "popping" noise from this Presonos Eris 5 studio monitor speaker. Electrolytic Capacitors are suspect number one.
00:00 - Faulty Presonos Eris 5 speaker. Classic "popping" sound.
03:48 - Teardown
07:16 - Testing for popping again
07:36 - Testing for hiss
08:32 - Rectified voltage testing
09:34 - Woah, that's that?
10:26 - Getting the PCB out
10:55 - A look at the PCB under the microscope
TAD7294:
https://www.st.com/resource/en/datasheet/tda7294.pdf
13:15 - Missing parts
14:39 - Removing the capacitors
16:00 - Measuring the main filter capacitors
17:14 - The Preamp PCB
18:08 - What is the most likely culprit?
20:21 - In-circuit ESR testing
21:32 - All new capacitors
24:15 - Soldering in new caps and testing
25:38 - What did I goof?
27:57 - Conclusion
Forum: https://www.eevblog.com/forum/blog/eevblog-1714-presonos-eris-speaker-repair-(capacitor-pop)/
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https://www.youtube.com/watch?v=xVp7yund84w