as some of you may have read, I recently have been working on upgrading my RM40s. I am doing 3 things, upgrading the midwoofer, upgrading to FST and moving the lower two panels up so that they are tight c-t-c spacing, & vitrifying the woofers.
Well I did all the baffle work for both speakers, but I only changed out the one speaker at a time. One is the original way I had it and the other is upgraded per above. I then hooked both back up and using the remote balance function of my Perreaux (this integrated rocks, I am going to seriously miss it) I was able to try each speaker one at a time and panning back and forth during the tracks, also listening to the same parts of the tracks on both speakers.
#1 the high frequencies are SO much better with the FST and the whole presentation gained clarity and openness. The other sounded nasally in comparison. There is also a slightly higher tweeter level maybe at the old settings.
#2 you definitely need to take a LOT of putty off when doing the MW upgrade. I am serious, without doing this all is different in the bass department. There is seemingly 2.5x the bass in the original vs the new with the same putty setting (tuned for original). This is simply due to the new being far too damped at the original setting.
Obviously I have some tunings to do and need to now do the second RM40 but thought I'd write this interesting non-scientific experiment I did this afternoon.
I mostly used the first two tracks off Morphine - Cure for Pain. It has good vocals and deep vocals which test out the lower midrange, a baritone sax that when solo's gets up in to the upper mids as well, lots of good hi-hat symbol and an upright bass.
