Bastanis DIY Forum

Re: How do I build an open-baffle full-range dipole sub?

24.9.92.12


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hi Robert

david sundby here i met you at rmaf in denver last mo. also last yr.

i am the man with the envirnmental sensitivities with the ciare ch250 speakers
as designed by norbert.

would you please take a few minutes to help me? even though i do not use your
speakers ( i cannot afford them) .

even though my baffle is 25" wide (.8 m) and though i have 15 cm. "wing"" of
cardboard staples to all sides of the baffles, i am not getting much bass from
250 hz. and under. the drivers are high Q and are supposed to make good bass
down to 65 hz. i use a sub to augment and it is set at 150 hz. the crossover
is 12 db/octave.

is it because my room is big? 3m/9m/6m.

how do you get bass down to 100 hz. with your driver on such a small baffle? my
driver have a much higher Q than yours and so it seems like i should have fewer
problems in this way than your design.

thankyou for any insight. sincerely, david sundby







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