I recently purchased db521 speakers for my Goldwing. According to forum members they were SUPPOSE to fit which
they will not. After searching the technical specifications page on this site I have found something that puzzles me.
I would like to know the reason that some places call a db501 a 5" speaker and some call it a 4" speaker. According to
the spec page, db401 & db501 are both listed as 4" diameter. The only variable which I see is 401's come with grills &
501's do not include grills. Both list cut out diameter as 3 11/16" which should be for a 4" speaker.
When I purchased the db521's I was under the assumption the 501's were 5" so I could surely fit a 5 1/4" speaker in the
same housing those guys were fitting in 5" speakers (which were actually 4" ones).
Now I am having to return/reorder correct sized speakers and want to be absolutely positive I am going to get a 4" speaker
if I persue the 501's.