Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tapped Horn "experts" wanted
Tapped Horn "experts" wanted
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 8th January 2019, 07:08 AM   #1
bazzheadnorway is offline bazzheadnorway  Norway
diyAudio Member
 
Join Date: Jan 2019
Location: Oslo, Norway
Default Tapped Horn "experts" wanted

so

I have two Soundqubed HDC4 15s laying in a way too small box atm and i want to make a nice upgrade box vise. This will be in a home cinema/ used for parties

Therefore im hoping someone knows some tips about tapped horns. wanted to share my current plans and i have looked into all sorts of types of cabs all the way from simple ported boxes to 8th order cabs.. that being said, what do the horn experts say about my current plans and can you use this massive driver in a tapped horn? how big of a box im a looking at if i want a "true" half wave lenght horn all the way down to 27hz ish? MUUCH appreciated in advance



Size: no limit

Operational Fq range: 27-50hz (do you tune tapped horns?)

Driver: SQ HDC4 15s

Amp: 5k pa amp by crown

Money material vise: deep pockets but uknow reasonable
  Reply With Quote
Old 8th January 2019, 08:32 AM   #2
chris661 is offline chris661  United Kingdom
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Got any T/S parameters for those drivers?

Chris
  Reply With Quote
Old 8th January 2019, 09:41 AM   #3
snappyturtle is offline snappyturtle  United States
diyAudio Member
 
Join Date: Jan 2014
might be bit of a long shot....

Fs - 34.99hz
Re - 2.14 ohms
Zmax - 21.48ohms
Qms - 4.14
Qes - 0.458
Qts - 0.412
Vas - 64.22 L
Le - 1.192mH
Mms - 331.8 grams
Cms - 0.062 mm/N
BL - 18.45
Xmax - 40mm
Sd - Coming Soon

mounting depth 8 1/8"
  Reply With Quote
Old 8th January 2019, 11:16 AM   #4
bazzheadnorway is offline bazzheadnorway  Norway
diyAudio Member
 
Join Date: Jan 2019
Location: Oslo, Norway
Quote:
Originally Posted by snappyturtle View Post
might be bit of a long shot....

Fs - 34.99hz
Re - 2.14 ohms
Zmax - 21.48ohms
Qms - 4.14
Qes - 0.458
Qts - 0.412
Vas - 64.22 L
Le - 1.192mH
Mms - 331.8 grams
Cms - 0.062 mm/N
BL - 18.45
Xmax - 40mm
Sd - Coming Soon

mounting depth 8 1/8"
Yeah those are correct, QTS too high?
  Reply With Quote
Old 8th January 2019, 10:33 PM   #5
Brian Steele is offline Brian Steele  Grenada
diyAudio Member
 
Join Date: Nov 2007
I came up with this, but it's a BIG box, 461 litres net. And passband is around 20 Hz to 60 Hz. With an Xmax of 40(!) mm, I might be tempted to go with a 4th order BP alignment instead...
Attached Images
File Type: png 2019-01-08 (1).png (23.5 KB, 326 views)
__________________
www.diysubwoofers.org
  Reply With Quote
Old 8th January 2019, 11:11 PM   #6
bazzheadnorway is offline bazzheadnorway  Norway
diyAudio Member
 
Join Date: Jan 2019
Location: Oslo, Norway
Quote:
Originally Posted by Brian Steele View Post
I came up with this, but it's a BIG box, 461 litres net. And passband is around 20 Hz to 60 Hz. With an Xmax of 40(!) mm, I might be tempted to go with a 4th order BP alignment instead...
!! Exactly what i wanted, the bigger the cooler" if you ask me,

But okey the high Xmax is more suited for 4th order? Its a car audio sub with huge magnets and stuff so idk if its a nono to build it around a PA type enclosure
  Reply With Quote
Old 8th January 2019, 11:48 PM   #7
JasonPJackson is offline JasonPJackson  Australia
diyAudio Member
 
JasonPJackson's Avatar
 
Join Date: Nov 2014
Location: Sydney
Default VAS and QTS

Loudspeaker driver VAS, QTS and to a lesser extent, fs, can vary considerably with break-in, temperature, age and humidity. Looking at the tiny 65 litre VAS measurement and the high 34hz fs, for a 15 these are unusual figures even before break-in. If these are your measurements, looks like they need a good ~20hz sine massage.

Just make sure the voice coils don't start hitting the back plate while doing this.
  Reply With Quote
Old 9th January 2019, 12:59 AM   #8
Brian Steele is offline Brian Steele  Grenada
diyAudio Member
 
Join Date: Nov 2007
Quote:
Originally Posted by JasonPJackson View Post
Just make sure the voice coils don't start hitting the back plate while doing this.
With a 40mm Xmax, that might require plugging it into the mains to get the cone moving that far.

Seriously, with 40mm Xmax, why not an assisted sealed design instead?
__________________
www.diysubwoofers.org
  Reply With Quote
Old 9th January 2019, 01:29 AM   #9
bazzheadnorway is offline bazzheadnorway  Norway
diyAudio Member
 
Join Date: Jan 2019
Location: Oslo, Norway
Quote:
Originally Posted by Brian Steele View Post
With a 40mm Xmax, that might require plugging it into the mains to get the cone moving that far.

Seriously, with 40mm Xmax, why not an assisted sealed design instead?
Im looking for the most bass possible (in the 27-60hz ish range) sealed doesnt sound that efficent.. SQ < SPL

I cant be the only one who dreams of building the sickest lowbass killer? No size limit on the enclosure, no limits what so ever tbh just hoping some type of a horn box or «cool» enclosure type works with those woofers as i have them just laying around, and these are not the cheap looking pa woofers you tend to see on these builds,

Just thought maybe a sick box with a sick driver would make for a good combo
  Reply With Quote
Old 9th January 2019, 01:34 AM   #10
jamesdb is offline jamesdb  United States
diyAudio Member
 
Join Date: Jun 2007
The EBP looks too low for horn use. EBP=(1/Qes) x Fs = 76.41. I think around 180 or higher is usually recommended for horns, with many having EBP in the 200 to mid 300 range.
  Reply With Quote

Reply


Tapped Horn &quot;experts&quot; wantedHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
"Enhanced" Anarchy tapped horn project. aceinc Subwoofers 41 3rd June 2018 10:24 PM
Will a 12" subwoofer work in a tapped horn designed for 15"? altie Subwoofers 5 8th April 2018 12:41 AM
Tapped horn sub that fits 30"X30" need help mustang guy Subwoofers 4 24th September 2014 02:09 AM
One 15" Tapped Horn vs Four 8" Tapped Horns Patrick Bateman Subwoofers 28 12th February 2013 11:12 AM
Single 8" or 10" Tapped Horn that can play 20-80Hz maxjr Subwoofers 12 16th January 2011 08:25 PM


New To Site? Need Help?

All times are GMT. The time now is 10:58 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki