Can you model a vented box in HornResp?

[hellonwheels]

I see how to make a 4th order bandpass, is there a way of making a rear vented box?

 

[soho54]

Use Nd, Tools>chamber>Rear Vented, and enter a Vrc, Lrc, Ap, and an Lpt.

 

[tb46]

Hi hellonwheels,

Or you could do it with the Compound Horn model (for your 6th order bandpass).

Regards,

 

[hellonwheels]

It seems to ignore the rear vent in the spl output... How can I get it to include the rear vent as spl? It does seem strange that it would totally ignore the output from the vent.

 

[soho54]

You have to look at the Combined SPL graph.

If you open the Wizard up you can flip between the driver, port, and combined outputs pretty easy. Seems like it's called default, 2nd, and combined.

 

[tb46]

Hi,

Give this a try, just an example. You can also add Ap1/Lpt:

Regards,

 

[hellonwheels]

Thank you, that was helpful.

 

[tb46]

Hi,

David McBean has given us a wonderful tool in Hornresp. Take a look Help, Page 19 for the compound horn, and you can use the Loudspeaker Wizard (e.g.: Response - Horn S1-S3 - Combined).

Regards,

 

[Antripodean]

Bringing this thread back to life 😉

Given I have the following parameters, what do I select to model a 6th order bandpass? (confused between the various suggestions on this thread)

And how do I approach the modelling if I already have a cabinet?

thanks!

 

[MaVo]

"normal" driver configuration
Vtc + Atc = Front chamber, S1+S2+L12 = Front Port
Vrc + Lrc = Rear Chamber. Ap1+Lpt = Rear Port

in compound horn, you can use S5+S6+L56 as rear Port.

 

[soho54]

Antripodean,

Are you asking how to convert the BP Tapped Pipe from the spreadsheet into a normal 6th order BP enclosure? If so, there isn't a direct way. You have to start over, as a normal BP enclosure works a little differently from what is on my sheet.

In my signature there are examples of several BP enclosures in the Hornresp How-To. The two 6th Order Dual Reflex methods MaVo listed, and a Quasi-6th Order Series-Tuned enclosure.

 

[Antripodean]

Thanks MaVo and Soho!

Yes Soho, I was hoping to use your sheet and simply input data ;-) I use it for everything else 😀

 

[MaVo]

cool guides, Soho. i didnt know about the TH -> Bandpass method 🙂

and about the original question... if you dont exactly know how to go for it, use one of the methods shown with some arbitrary numbers and look at the schematical drawing hornresp produces. could help to see how those numbers correlate with the box design.