Im interested in a bandwidth like this for near field subs. I want the non linear attack for movies. Would this be a large enclosure? Maybe with a 12 or 15?
TP12LL34
I built a 12 inch version of this in the thread above.
There is measurements and a lot of discussions of the pros and cons of this kind of design.
But massive amounts of positive acoustic feedback does sound "odd" to some people.
I built a 12 inch version of this in the thread above.
There is measurements and a lot of discussions of the pros and cons of this kind of design.
But massive amounts of positive acoustic feedback does sound "odd" to some people.
interesting, the added length/resonator sure seems to suck out the middle of the bandwidth ?
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im having trouble modeling the hroar. i prefer hroar's form factor over the tp12ll34 or roar. i have dayton 12lf at my disposal currently. when i try to model it for hroar it just becomes a bunch of spikes and no useable bandwidth. ive tried the bp6s and th w/ chamber methods but cant seem to work it out.
It's because with a 0.21 Qts it's a compression horn or high power midbass prosound driver that in theory 'wants' a vented 20*1247.8*0.21^303 = 17.15 L, 0.42*28*0.21^-0.96 = 52.6 Hz Fb.
Since you add mass (long L34 acts as a passive radiator) and with the help of the massive positive acoustic feedback enhance the upper part of the passband, you effectivly strech out the usable passband. The dip in the response is an area where the driver gets somewhat unloaded from the resonators and I would guess that the acoustic feedback (resonator feeds back through the driver) gets out of phase enough to become negative feedback.
these are the same parameters as the original post by circlomanen using the same gas driver. what am i doing wrong?
What was wrong, Looks like you fixed it?
Maybe make your second resonator longer, so that huge peak blends a little bit smoother into the lower resonace?
No I just posted a quote from circlomanen for reference. Literally same driver same box. Inputs look identical to me but mine is sh*t lol.
Try connecting a resonator 1/3 (harmonic) as long as the upstream section and it’s crazy ‘obnoxious’, like a paraflex .
I just wanted to see what the response looked like with a longer length.
The lowest note on an 88 key piano = 27.5hz.
What would this look like as a schematic? I don't see where you would add another resonator between the two... 3 resonators, I think this box would be cumbersome. Also, Why are you modeling these as helmholtz bp and not th?
Take your pick...no angles or positive angles.these are the same parameters as the original post by circlomanen using the same gas driver. what am i doing wrong?
BTW, I have 4 VD-8's for a future F150 build.
you will be stuck listening to this as motor/mechanical noises or spiders at xmax etc...... its weird!!
I think there’s more to it than that as well? Harmonic distortion from lower notes being played but exciting those other resonances?.? Things I don’t understand but can ‘hear’?
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It looks like Hornresp has changed since the original screenshot was posted. If you switch the parameters for chamber 1 and chamber 2 it should give the same response