It would be for purely aesthetic reasons in order to match the vertical slots on the monitors. But it also like to bottom front mouth since it is very discrete.
I like your suggestion @weltersys and see how that could be an improvement in output, for this project however I am looking for a subwoofer where the driver is hidden.
As mentioned, in post #2 & 16, the driver could be mounted vertically in a slot if you don't want it hidden.
The slot exits could be on the left and right to match the aesthetics of the vertical slots on the monitors:
The red lines are roughly where the "L" bass reflex port path could be placed.
The driver and side slots could be placed near the bottom if you prefer that aesthetic.
Art
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This mouth will work too.
Shout out to weltersys' Keystone TH!
Shout out to weltersys' Keystone TH!
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This does sound like an interesting solution. So this would perform more or less as the BR boxes you modeled before?
How would slot loading effect the performance?
Thanks, will do. As mentioned before I’m just digging into the topic of subwoofers for the first time so nice to find some informative threads to follow.
Are there some general pros and cons of BR, BP6P and ST-TQWT typologies 😵💫 ?
For me I’m mostly just interested in the 20 - 60Hz range.
Are there some general pros and cons of BR, BP6P and ST-TQWT typologies 😵💫 ?
For me I’m mostly just interested in the 20 - 60Hz range.
The low end would be nearly the same, the slot will make a narrow band peak in the upper response, followed by a drop in response something like this response from a SLOB (slot loaded open baffle):
The frequency of the peak and (dips) depend on the depth and volume of the slot.
ST-TQWT = negative flare tapped horn.
Hofmann's Iron Law = loud, low, small...pick 2.
Negative flare TH = low & small.
Negative flare TH is still more efficient than a BR and can be near the same size.
In it's simplest form, a single fold TH requires the same number of panels as a BR without bracing...7.
As I discovered with my latest POC build, having a peak in the response like that is a great way to magnify any harmonic distortion (in this case any generated at 100 Hz, 50 Hz and 25 Hz). As to whether than amplified distortion is actually audible, that's another matter...
Brian,
The response in post #31 would be close to worst case, just used for illustration.
Using a very small plenum volume with two narrow side exits may result in only a 3-4dB peak up in the 500-600 Hz range, the 10th harmonic of 60Hz, (JBLutz, the OP is only interested in the 20-60 Hz range).
The LAB 12 used as a BR has very little distortion past the third harmonic, and when used below or up to Xmax, those won't amount to much from my measurements and listening.
Art