You want L Pads, not Pots. L Pads do not alter the impedance, Pots do. My L-Pads from Parts Express are 16 ohm for my 16 ohm speakers.
Speakers are like blind people who have been kidnapped. They do not know where they are being taken/kept. Possibly moved to a different hangout at any time.
I am a big fan of adjusting mids to the woofer and adjusting tweeters to the mids: in the space they will be used, for the ears that will be hearing them.
I use a SPL meter on a tripod at listening position and take my time with this CD’s test tones. Last time took 1-1/2 days, they never sounded better!
this sold yesterday on eBay for $10. tracks 9-38
Pots are better than no control, I restored two pairs of AR-2ax's, replaced original pots with new pots on 1 pair for my office and refurbed original Pots for the pair in my Garage/Shop system. And a member here send me a full set of good original Pots as spares. Thanks again for that generosity!