Is this driver unsuited for bass reflex?
EBP=69.2, but the seas datasheet does noe recommend bass reflex
Anyone tried? I already have an 28 liter aperiodic box, but want more low end.
http://www.seas.no/images/stories/vintage/pdfdataheet/h085_25f-ew.pdf
EBP=69.2, but the seas datasheet does noe recommend bass reflex
Anyone tried? I already have an 28 liter aperiodic box, but want more low end.
http://www.seas.no/images/stories/vintage/pdfdataheet/h085_25f-ew.pdf
As a kid I inherited two pairs of Seas kits 302 and 303 using the same drivers as Dynaci A25 and more or less the same box design. I did lots of modifications on them with little luck bass reflex especially was no improvement. Some years later however I decided to put them in a new subwoofer box 45l which helped in the low end. Unfortunately I burned them one by one in this “sub” design. I also burned the tweeters in another project. Today I totally regret wasting these otherwise great sounding speakers, I had no respect for things in general back then and my crazy old Tandberg TR1000 destroyed everything I could get my hands on.
Edit: my drivers had alnico, so maybe not exact same.
Edit again: My drivers were 25TV-EW, not really sure if the kit 302/303 is correct after all. I had the large tweeters so maybe it was a A25 after all.
Edit: my drivers had alnico, so maybe not exact same.
Edit again: My drivers were 25TV-EW, not really sure if the kit 302/303 is correct after all. I had the large tweeters so maybe it was a A25 after all.
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If you increase the enclosure size to 50ltr and fit a 2" x 4.5" port, that will give you an F3 (-3db) of 45hz. That usually sounds nice in most rooms, once you add room gain.
In an aperiodic box of 28ltr the F3 will be about 63hz (bass will sound a bit weak).
In case you don't already know. If you do decide to increase the enclosure volume, keep the baffle dimensions the same as they are now, and just increase the depth of the cabinet. Keep the driver positions the same as well.
EDIT: Remember to increase the enclosure size to allow for the drivers and any bracing.
In an aperiodic box of 28ltr the F3 will be about 63hz (bass will sound a bit weak).
In case you don't already know. If you do decide to increase the enclosure volume, keep the baffle dimensions the same as they are now, and just increase the depth of the cabinet. Keep the driver positions the same as well.
EDIT: Remember to increase the enclosure size to allow for the drivers and any bracing.
Yes, I have also simulated this in WinISD
Question is if the drivers is suited for bassreflex or not
Question is if the drivers is suited for bassreflex or not
According to the data sheet, Seas don't actually say it's not suited, they simply don't give a recommended bass reflex cabinet volume. If the T/S parameters say it's practicable, then you should be good to go with a vented enclosure.
Some high q speakers model badly in a ported enclosure, and no matter what you do, they have a peak in the bass.
That driver models perfectly fine in a ported enclosure.
That driver models perfectly fine in a ported enclosure.
Good enough to feel the positive change in bass quality. I'd measure T/S parameters to be sure.
Peter Comeau has a bigger aperiodic box project.
As I remember, World Design's WD25T was the name.
Edit:
Designing Loudspeakers - WD25T EX - The next step
As I remember, World Design's WD25T was the name.
Edit:
Designing Loudspeakers - WD25T EX - The next step