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In Reply to: this week's OB experiments and conclusions posted by nl on February 11, 2007 at 14:21:10:
I had a good experiment myself today. One basic (obvious) problem with OB's is the size baffle required to get bass. (I have 4x4's myself and they do pretty good, but too big for my room (and they cut out some of the wall bounce I like)). So I decided to try a compensation network to cut down the highs enough to get a balanced presentation with a sub-optimum baffle (12" FR (guitar) driver with only itself as the baffle). First I tried the normal BSC procedure and that worked to some extent but not enough. So I tried a 6db/octave LP coming in @~ 2xFs (lower and you loose some of what little bass you have to begin with). Tonal balance is pretty good!
Bypassing the coil with a resistor and or cap can adjust the highs. BUT :( Mr. Distortion (IM?) The bass fuzzes up the mids and highs since they are at such a comparatively low level......
Follow Ups:
?
have to bend down for mine
https://www.wmballen.com/ProductDetail.cfm?product_id=215
too far for comfort? - maybe it would be better to make a faux opdn baffle coax with small cone strapped across a 15" woofer?? Eminence 15 (parameters unknown but ~beta size magnet) at e-pay go for ~$55 ea including jacked-up shipping - are there cheap but good lil FR to keep up on a bra-strap so total price won't exceed $75? - shoulda got some of those $15 warrior 15 (~$31ea with shpping)
https://www.wmballen.com/ProductDetail.cfm?product_id=216
how much? - -here's a pigNpoke helper (??) woofer - scroll down to featured items
........
Wow!
http://www.audiocircle.com/circles/index.php?topic=36985.new;topicseen#new
?
http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=290-057
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