As I wrote in my message #6532 that I sent on 01/15/2024 and as you can see in the photos I attached to my message #6534 (sent the same day) a non-negligible difference between the original woofers of the DQ10 and DQ20 (the ones with the masonite ring) and other woofers with the same dimensions and holes is the position of the cone in relation to the basket. In the original woofers the cone is significantly more forward than in the other woofers. This compromises the time alignment of the woofer in relation to the other transducers.
