Ported Sub to Tapped Horn. Few questions before starting

[suparub]

GM Word ! Hornresp for Dum... hmm... Everyone 😉 - Home Theater Forum and Systems - HomeTheaterShack.com

So it gives me similar sims as BassBox Pro, except than the frequencies starts wayyyyy later (at 90Hz if I don't mistake) than 40Hz, where I'm already at 122db on BassBoxPro

It's the first time I'm using it so I may have done a mistakes, any help to correct me or that's seems alright ?

RCF LF15N401


RCF MB15N401


sim, in black the MB15N401, in grey the LF15N401

 

[GM]

Erm, you were comparing the drivers in vented alignments...............

GM

 

[suparub]

that's right, tools > output > Combined right ? (not "port" neither "horn")

Here is the enclosure design for reference : http://www.lean-business.co.uk/SPEAKER_PLANS/CIARE 15.00 SW DUAL REFLEX.pdf

 

[David McBean]

It's the first time I'm using it so I may have done a mistakes, any help to correct me or that's seems alright ?]

Use the Input Wizard accessed from under the Help menu to generate a representative example of a bass reflex loudspeaker, and then edit the input parameter values to match your actual design.

 

[suparub]

Much better, thanks David ! Also made a mistake with the port surface (in mm2 instead of cm2) 😱



This 400 - 500Hz drop is stressing me a lot ^^

 

[David McBean]

Also made a mistake with the port surface

Ap = 25000 cm2 did seem rather large 🙂.

 

[freddi]

suparub - I didn't understand your hornresp input above with the choked throat (80 sq.cm.) front horn and long vent

here's a plain reflex - hope I got the vent area right for two 119mm diameter round vents

 

[suparub]

In fact, I had checked "NO" when it proposed me "Do you want to mask direct radiator vented-box enclosure resonances". Is this the right thing to do to press YES, if so I find the same as you freddi. Thanks again Boss 🙂

 

[suparub]

Also now, Xmax (+-6 on this driver) ! Should I trust WinISD, BassBoxPro or Hornresp ?


If I listen to WinISD and BassBoxPro I dont need to apply any filter. If I listen to Hornresp I need to apply a filter and it will reduce drastically the SPL ^^.
All measures at 800W

 

[Crashpc]

Hey. Each enclosure has its own adantages and disadvantages obviously. And performance or feasibility of these can change with required box volume. For certain weights and sizes, Tapped horn is not the best solution, while for different setup it could be. Some comparisons here seem to be a lot unfair to the bassreflex box. 10dB nonsense is rigged badly most of the time. Also with size for size, we could add TML and bandpass enclosures. I greatly recommend younto settle on sizes and weights first. Then move on with the rest.