hello
i have built ZA5
ZA14 - very clear and uncolored
DQ25 is problem
it does not have rear chamber, only foam on pole piece, and it has very colored low end (1-3 khz), if compare to twitter, that has hole in pole piece and rear chamber with damping matherial like 27TBFC/G for example
below is photo of my experiment to replace DQ25 diaphragm to Vifa XT25 magnet system
it was just experiment, to hear difference, and a lot of coloration on 1-3 khz, has passed
main problem in DQ25 is long CSD tails on low end
i have built ZA5
ZA14 - very clear and uncolored
DQ25 is problem
it does not have rear chamber, only foam on pole piece, and it has very colored low end (1-3 khz), if compare to twitter, that has hole in pole piece and rear chamber with damping matherial like 27TBFC/G for example
below is photo of my experiment to replace DQ25 diaphragm to Vifa XT25 magnet system
it was just experiment, to hear difference, and a lot of coloration on 1-3 khz, has passed
main problem in DQ25 is long CSD tails on low end