Originally Posted by
grumpy
Cost vs. performance goals. The way the 'round metal cylinders' are constructed allows
for a more compact and less costly capacitor (for a given value), but with some price to pay in
higher frequency performance... the yellow mylar capacitors perform better than the electrolytics
at higher frequencies but can be both enormous and quite costly for larger values. The selection
by the designer was presumably made to reach both a price point and listening enjoyment level.
Frankly, if enjoying the speakers as they were built is the goal, I would just either
continue listening to them, or if an actual problem is found with them, replace the
electrolytic capacitors (the round metal cylinders). Note that these are "bi-polar"
or "NP/non-polar" capacitors,... most electrolytic capacitors are not, and most have
very sloppy value tolerances ... look for 10% or better.