That kind of manufacturing - solder and "cleaning" - is not unusual for Meridian. I've sent them a lot of pictures in the past but they are not able to fix that. I give up on that also they never get that under control...

800v3/218/271/8k.2/5k5s smile /5kC/DSP3200/Reviver/
TT-ELP/Graham Slee Revelation/Trinnov Altitude 32/OPPO 205
__Ayon/HB/Shunyata/Miltzow -- power cables,
__Ayon/Jungson/Miltzow --analog, Miltzow-- digital,
__Vortex/WMA ,