Hi Demidemon, don't cut those ports! I ran some numbers in a box program and a 4" diameter 6" long port isn't needed. Worse yet it will tune the woofer enclosure too high and you'll loose some deep bass. Honestly I never heard any cuffing noises from the stock port but I put in a 2.5", 6" long port mainly for looks
Now for the good stuff. The first speaker is done and WOW
, what an improvement!
For the mid, out came the 150uF cap. In it's place, two poly caps equaling 45uF. Out came the 1mH inductor replaced by a 0.30mH air core coil & the Zobel network stayed in the circuit.
For the woofer, a 2.56mH inductor in place of the stock 2.2mH one.
For the tweeter, stock value Audyn Q4 caps replaced the originals and I removed the stock resistor.
I also replaced the tweeters. I used pair of Infinity Polycell tweeters I happened to have. They fit, match the SPL level and are 8-ohms but I did have to drill new mounting holes. To me the originals just sounded harsh, not very detailed and what sounded like a big peak around 5000Hz.
The mids sound much better now that the midrange speaker is the only one covering those frequencies. Much more detail and presence as well now that the mid was playing up to 4000Hz and matching up with the tweeter. The mids are more balance across the range with the driver no longer playing the same frequencies as the woofers and playing up to the tweeter X-O point instead of beginning to roll off at 1250Hz. The bass is now cleaner and tighter now that woofers don't overlap with the midrange. I've only worked on one speaker so I could compare it to an unchanged one. It's clearly better and sounds like a much more expensive speaker now. Now to get started on the other one, but first...