Hi everyone, hopefully this will question will be a quick one to answer. I was contemplating the possibility of using a wideband driver to cover the range of approximately 100-3k, and putting said driver in a high Qtc (~1.3) enclosure to take advantage of the rising response between 100 and 300hz to offset the effects baffle step before handing the driver off to a woofer. I know that there are consequences to a high Qtc alignment but I still thought I’d see if anyone has used such an arrangement as a solution to baffle step. Would there be significant repercussions to the response of the driver outside of the mid bass range?
Thanks in advance for any insights!
Thanks in advance for any insights!
Greets!
The pioneers did, though they also used drivers with Fs somewhat below a recordings lowest useful BW to ensure acceptable acoustic damping, so 'caveat emptor' applies. 😉
The pioneers did, though they also used drivers with Fs somewhat below a recordings lowest useful BW to ensure acceptable acoustic damping, so 'caveat emptor' applies. 😉
I've guessed a nominal baffle size and driver size (e.g. 6.5" typical midrange driver. a smaller driver has even more losses)
Although your idea may compensate for the 100-300Hz range, you'll still have "losses" between 300Hz to ~ 1KHz.
In other words, you may get an upper midrange dip.
Although your idea may compensate for the 100-300Hz range, you'll still have "losses" between 300Hz to ~ 1KHz.
In other words, you may get an upper midrange dip.
Thought has crossed my mind.
Easier to use wide baffle and offset driver.
Use a woofer to cover the rest.
Or just use higher sensitivity woofer.
If skinny, seems taller tower, side mount woofer
made things easy.
Easier to use wide baffle and offset driver.
Use a woofer to cover the rest.
Or just use higher sensitivity woofer.
If skinny, seems taller tower, side mount woofer
made things easy.
Two problems with this approach:
1) the baffle step is between 3dB and 6dB "deep". What would typically be a high Q sealed alignment will not have THAT much peak gain.
2) the baffle step occurs over almost a decade of frequency. A high Q alignment has a rather narrow band where the response is peaking. That band is not wide enough to cover enough of the baffle step to be useful.
The EQ requirement for the baffle step is just not a good match to what can be provided by a peaking alignment no matter how wide the baffle. You might as well just make the baffle into a very broad curve (e.g. over 4 feet wide) and then place the loudspeaker against the back wall. But that is known to "sound bad" for a variety of reasons and would result in a huge cabinet.
Thank you for helping me with that Mooly! I‘m not sure how I ended up with two accounts. It was certainly by accident and was worried I’d get in trouble 😅
thanks everyone else for your comments. Sounds like this is a nonstarter, and I’m not surprised to hear it.
This paper has a chart showing how much gain can be expected:
https://riunet.upv.es/bitstream/han...speaker enclosures: closed box.pdf?sequence=1
also some interesting graphs here:
http://alteclansingunofficial.nlenet.net/publications/techletters/TL_264A.pdf
https://riunet.upv.es/bitstream/han...speaker enclosures: closed box.pdf?sequence=1
also some interesting graphs here:
http://alteclansingunofficial.nlenet.net/publications/techletters/TL_264A.pdf