I have designed a audio spectrum analyzer circuit with THAT4315 and a drivers for IN-13 bar graph nixie tube to visualize the signal level.
To supply +-12V to the opamps, the Meanwell NSD15 module is used. At the moment, no additional input/output voltage filtering (other than the caps on the module) is used.
The problem is that the electrolytic capacitors are getting too hot. I measured around 55 deg.C using an infrared thermometer. It's hard to pinpoint the exact caps, which are getting hottest, but it looks like the ones encircled in the schematic are slightly hotter than others.
Any ideas about what might be causing the caps to get hot in this circuit?