I’m having a hard time seeing what’s going on here, and I’ve never used BASTA, but it looks like this is a notch filter which creates a dip at 50Hz, not a second order high pass. The capacitor needs to be in parallel with the woofer, instead of being in parallel with the inductor.
Perry's right, you have a cap and a coil going from 'in' to 'out' nodes, which gives you a parallel notch filter. You need the inductor to go from 'out' to 'gnd' instead. (Also, I see you've got three woofers in parallel - not sure if that's what you intended?)
Basta basics:
You enter all the driver parameters in the 'Driver' tab, and then enter the baffle details via the 'Box' tab (checking the 'Baffle' button for OB), and then the 'Baffle designer' option. In the 'Baffle designer' pop-up, you need to remember to check the 'Enable' button.
Proposed passive crossover can be entered either via the 'Passive filter' tab, which is simpler, or via the 'Advanced network' tab which is a bit trickier, but more flexible.
Perry's passive bass boost is basically a second order high pass if I remember correctly. You could enter it on the 'Passive filter' tab, instead of the 'Advanced network' tab, if you find that easier.
(PS: I like the 'Curves' tab in Basta! I always check the boxes there for cone excursion and maximum output level. Those are quite important things to keep an eye on with OB.)
Basta basics:
You enter all the driver parameters in the 'Driver' tab, and then enter the baffle details via the 'Box' tab (checking the 'Baffle' button for OB), and then the 'Baffle designer' option. In the 'Baffle designer' pop-up, you need to remember to check the 'Enable' button.
Proposed passive crossover can be entered either via the 'Passive filter' tab, which is simpler, or via the 'Advanced network' tab which is a bit trickier, but more flexible.
Perry's passive bass boost is basically a second order high pass if I remember correctly. You could enter it on the 'Passive filter' tab, instead of the 'Advanced network' tab, if you find that easier.
(PS: I like the 'Curves' tab in Basta! I always check the boxes there for cone excursion and maximum output level. Those are quite important things to keep an eye on with OB.)
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The cap should be in series with the woofer, and the coil parallel to the woofer, yes?
I am trying VituixCAD2 , but its difficult to understand sequence from beginning to end. I mean - I took frequency graph and impedance snippet and got them sorted in Vituix. Next? Difraction tool, calculator tool, merger? ...Whole day on. I do understand is learning curve, but without instructor on road is hard. Cant get started yet;(
SORRY I got that backwards. Coil in parallel with woofer. Cap in series with both. Like this.
@perrymarshall Looks good? Don't know I put 3x drivers in but still only 95Db. And this FaitalPRO even Qts0.45 works out with boost. Is that possible?
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It looks like all your drivers are in series, so the impedance is higher and that’s why the SPL is not as high as you want.
It looks to me as if you have the drivers in series, as Perry suggested.
I'm pretty sure, from the shape of the response in your sim, that you haven't clicked the 'Enable' button in the 'Baffle step/edge diffraction' area of the 'Baffle designer' pop-up. So the response you're seeing doesn't include any dipole roll-off at low frequencies.
Yes, it means the maximum output level the driver (or combination of drivers) is capable of. It will be limited by driver power handing and also by the size of amplifier specified in the 'Power amplifier' tab. In the low frequencies, however, it will be limited by driver excursion. (If you are modelling a ported box, it will also be limited by the vent parameters you enter.)
@perrymarshall That's the resistance of the coil (or it could include resistance added in series with the coil.) Basta! doesn't suggest any values for coil resistance, you have to specify this yourself.
Hope this helps.
Again, I'm pretty sure the 'Enable' button hasn't been clicked. And you've got the drivers in series again, so no sensitivity gain over a single. There may be something else going on too, though, as I can't get quite the same response shape as you when I try it.
I thought that is what I needed to do if I mounted two or free drivers. It does mean nothing to me at the moment, just trying to get basics...
It doesn't change anything , even worse if tick off series. And added Resistor is to increase impedance from 2Ohm up to 4 ohm load...
It doesn't change anything , even worse if tick off series. And added Resistor is to increase impedance from 2Ohm up to 4 ohm load...
I don't know, it really doesn't stack up. Hear I replicated Bass Boost copying Perry's parameters on Eminence Alpha 15A, and results are miser in Basta!
Not sure what you're referring to. If you connect two identical drivers in series, you get the same output as a single driver. (You are actually gaining 3dB because of the doubled cone area, but losing 3dB because of the doubled impedance/halved power draw.)
If you connect two identical drivers in parallel, you gain 6dB output. (3dB from the doubled cone area, and another 3dB from the halved impedance/doubled power draw.)
The software will show you that. Remember that if you have passive components in the circuit and you change how the drivers are connected, you'll change the response significantly.
O.K. But why Eminence alpha 15A boosted by Perry gains +6db, while same circuit boost gives +1db in Basta!
Well, in post 35 I can see that in Basta!, your inductor is 820mH. More importantly, it's entered between the nodes 'in' and 'gnd'. It won't do anything there. It should be between 'out' and 'gnd'. At the moment, only the cap is doing anything.
You're learning fast, but you can't expect to master 2 new pieces of software and learn all about speaker design in a couple of days. (No-one would expect to learn how to design an amp in a couple of days.) Take your time, you'll get there.
You're learning fast, but you can't expect to master 2 new pieces of software and learn all about speaker design in a couple of days. (No-one would expect to learn how to design an amp in a couple of days.) Take your time, you'll get there.