8" subwoofer horn |
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akadj
Registered User Joined: 25 June 2015 Location: Edmonton Status: Offline Points: 16 |
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Posted: 09 October 2017 at 6:09am |
I was looking for a set of plans for a front loaded horn using an 8" Atomic AP8 subwoofer.... I have all the t/s.
I wanted Something that would really only just play loud from 50hz to 60hz. "Peaky" if that's what you call it, and it has to be within that range. Something that has a straight taped flare like a trombone. I have a lathe and CNC so it will be super easy and would be a cool project I don't know how to calculate the tuning for the throat,straight axis,and mouth to tune between 50Hz - 60hz Any help would be appreciated. Thanks, Edited by akadj - 09 October 2017 at 6:10am |
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djeddie
Old Croc Joined: 26 April 2004 Location: Bristol Status: Offline Points: 4125 |
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Well, using 50Hz, for 1/4 length you'll be looking at just under 1.5m and for full length it would be 6m!
Best thing is to download a copy of HornResp (Google it, it's free), put the T/S params in and go from there. |
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Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB
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akadj
Registered User Joined: 25 June 2015 Location: Edmonton Status: Offline Points: 16 |
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I don't have a computer, only a smart phone but don't think hornresp will work on it
I.5 meter is pretty much what I was expecting. . . Just not sure about mouth and throat Does anyone have the program and able to plug these in to get me the required dimensions? Thanks |
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Keen
Young Croc Joined: 30 May 2011 Location: Brisbane, Aus Status: Offline Points: 1203 |
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post the t/s, someone will get on it for you.
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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Whats the point of 50-60 hz only? Also, this might be easier to realize as a bandpass, if you are absolutely insist on restricting response to that small bandwidth...
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akadj
Registered User Joined: 25 June 2015 Location: Edmonton Status: Offline Points: 16 |
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Name= ap8.44.new qt motor ww 40
Note= Model= TSL Domain= FreeAir Shape= Round Profile= Cone Fmd= 3.0000 KA Qmd= 1.0000 Flp= 8.0000 KA Qlp= 2.0000 Znom= 4.0000 Ohm Revc= 7.2000 Ohm Sd= 25.0000E-3 M² Mmd= 95.3400 g Pmax= 1.0000E3 W Rtvc= 250.0000E-3 °C/W Xgap= 10.0000E-3 M Xcoil= 40.0000E-3 M Xmax= 15.0000E-3 M Krm= 11.1100 mOhm Erm= 899.0000E-3 Kxm= 280.3000 mH Exm= 530.0000E-3 Rms= 4.3376 N·S/M Mms= 97.6116 g Cms= 128.1486 uM/N Vas= 11.4397 Ltr Fo= 45.0000 Hz Qms= 6.3627 Qes= 0.5359 Qts= 0.4942 BL= 19.2567 T·M Levc= 4.5970E-3 H SPLo= 84.7250 dB No= 186.5000E-3 % I guess I could build an enclosure with the flared straight horn and a bandpass and see which performs the best. that would be fun too!, its only wood and quick to make! the total usable space i have for this 8" is 75cm wide 38cm tall, 100cm in depth
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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is this for some kind of sound effect use?
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VECTORDJ
Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 513 |
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Is this one of those fake posts???
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akadj
Registered User Joined: 25 June 2015 Location: Edmonton Status: Offline Points: 16 |
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no joke guys, just kinda want to get started on these projects, here a photo of the 8" 1500 watt RMS woofers i will be using!
Edited by akadj - 11 October 2017 at 4:35pm |
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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Do you literally intend this loudspeaker to play "from 50 to 60h", or do you mean "from 50 or 60 hz upwards"?
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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Oh, and looking at the qts of that car audio driver, it is not very suited for horn loading
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akadj
Registered User Joined: 25 June 2015 Location: Edmonton Status: Offline Points: 16 |
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i will only play in the 50hz to 60hz range
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