I have a jantzen HP 900018 bass reflex that is tapering towards its end. On the beginning it has 57 mm and on end 68 mm . The question is what diameter do i enter into simulation software ? My guess would be the average of ~ 63 mm ?
Also , there is a MONACOR BR-70HP port that looks very simillar to this jansen almost identical but its specs say it has fixed diameter of 57 mm. Coult it be they are the same product and monacors instruction is understated ?
links:
MONACOR: BR-70HP
http://www.jantzen-audio.com/wp-content/uploads/2019/12/Port-Tubes.pdf
page 20
Also , there is a MONACOR BR-70HP port that looks very simillar to this jansen almost identical but its specs say it has fixed diameter of 57 mm. Coult it be they are the same product and monacors instruction is understated ?
links:
MONACOR: BR-70HP
http://www.jantzen-audio.com/wp-content/uploads/2019/12/Port-Tubes.pdf
page 20