I have a pair of Sequel IIs from about 1992. A few months ago, I replaced all the electrolytics AND film caps. I upped the voltages on essentially everything, particularly the film caps. There was a noticeable improvement which I think you would hear on the Sequel IIIs. Note that the...
Ken,
Welcome! Sorry if this first section is repeated. Had an interruption while writing and came back to finish.
I’ve had a pair of Sequel IIs since 1991. I replaced the woofers (DIY) a few years ago due to one side blown but the Mylar is still original.
I would like to refer you to...