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

System Pictures & Description
System Pictures & Description
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 28th October 2017, 02:10 PM   #151
SwitchDoctor is offline SwitchDoctor
diyAudio Member
 
Join Date: Apr 2017
Default Horn rotation

Quote:
Originally Posted by MemX View Post
Looks good

Would turning it 90degrees to the right (pointing the mouth at the wall) lower the tuning at all?

Is a shame you have to hide it away, either way!
The driver faces left currently with a 2" gap to the wall. Originally i designed it to go horizontal but it just looks better upright. So as you say i tried rotating clockwise so that the driver faced the back wall and the horn to the side and tried various distances.

I'm glad that the amp i'm using has a phase reversal as the rotation initially dampened the bass from the main speakers. Inverted phase and all was ok again.

The honest truth is that when i face the cone forward into the room, it'll shake your kidneys. Facing it down or into any wall still seems to take the attack, the sub-sonics are definately there as listening with high bass regae makes you sick after a bit.

I've now gotten over the novelty and blended it back into the sound correctly and it's definitaly added a dimension to my listening that simply wasn't there before even with my nice Naim/Tannoy setup.

New bass amp next me thinks.
  Reply With Quote
Old 1st December 2017, 09:34 AM   #152
Vortex is offline Vortex  Hungary
diyAudio Member
 
Vortex's Avatar
 
Join Date: Jan 2004
Location: Budapest, Hungary, Europe
Send a message via ICQ to Vortex System Pictures & Description
Dear all,

I'd like to build a cylindrical sub with an 18" driver (actually, this would be the bass part of an active 3-way system). Do you have any recommendations, formulas, software, link, whatever .. to correctly tune such a "pipe" woofer accordingly ? Besides high power I'd also need quality sound of these baffles, no peaks, dips, whatsoever.

Drivers are 2 Daytons. Using the cylinder design, woofer would be on the front, facing the listening position and there would be a port on the back. But all other parameters I don't really know yet, e.g. length of the baffle (with almost the same radius what the driver has), port diameter, port length.. (tuned at around 20-25Hz ..)
__________________
Always remember you're unique, just like everyone else.
  Reply With Quote
Old 1st December 2017, 09:34 AM   #153
Vortex is offline Vortex  Hungary
diyAudio Member
 
Vortex's Avatar
 
Join Date: Jan 2004
Location: Budapest, Hungary, Europe
Send a message via ICQ to Vortex System Pictures & Description
Something like this, yepp.. but front facing driver.


Quote:
Originally Posted by Ivan Ingram View Post
I figured I would help populate this thread a bit.

here's a sonotube sub I just finished for my home theater.

Attachment 284627
Attachment 284628

20"x36" tube with maple veneer, parts express classic sub.

After watching a few scenes from the Star Wars bluray's, I can safely say that it gets the job done quite well.
__________________
Always remember you're unique, just like everyone else.

Last edited by Vortex; 1st December 2017 at 09:47 AM.
  Reply With Quote
Old 2nd December 2017, 11:40 AM   #154
MemX is offline MemX  United Kingdom
diyAudio Member
 
Join Date: Sep 2013
WinISD?
Akabak?
  Reply With Quote
Old 2nd December 2017, 05:43 PM   #155
Vortex is offline Vortex  Hungary
diyAudio Member
 
Vortex's Avatar
 
Join Date: Jan 2004
Location: Budapest, Hungary, Europe
Send a message via ICQ to Vortex System Pictures & Description
Quote:
Originally Posted by MemX View Post
WinISD?
Akabak?
Haven't tried any of these yet. At least not for cylinders. I'll check, thx.
__________________
Always remember you're unique, just like everyone else.
  Reply With Quote
Old 4th December 2017, 09:04 AM   #156
Vortex is offline Vortex  Hungary
diyAudio Member
 
Vortex's Avatar
 
Join Date: Jan 2004
Location: Budapest, Hungary, Europe
Send a message via ICQ to Vortex System Pictures & Description
Quote:
Originally Posted by MemX View Post
WinISD?
Akabak?
WinISD gives me for the 18" woofer around 700 liters volume. This means: a cylindical box of the driver diameter and 1 meter in length which would be ok for me. However the port sizes and length are strange.. so.. I don't feel that safe yet.

The perfect example is here, the bass section. I'd like to reach something similar. (Courbé speakers)

Click the image to open in full size.
__________________
Always remember you're unique, just like everyone else.
  Reply With Quote
Old 4th December 2017, 09:46 AM   #157
PRTG is offline PRTG  Latvia
diyAudio Member
 
PRTG's Avatar
 
Join Date: Mar 2005
Location: Riga
System Pictures & Description
I find BassBox Pro software quite usable.

Pros: it allows to simulate 4 most popular bass alignments - closed, vented (inlcuding extended bass alignment), bandpass and passive radiator. It also takes into account stuffing; what's most important it allows to simulate at what input power level chosen driver will reach its Xmax in chosen enclosure type and box volume, and at what frequencies. Large driver database with possibility to add new drivers. Output graphs have overlays so you can compare graphs for two or more different designs (remember to switch off normalization to compare absolute output levels). For your case box geometry list includes also cylinder. It includes also possibility to blend simulated responses with room/car response curves, however I haven't tried this. Anyway, room response heavily depends on sub placement and listener's position in it, so this must be taken into account when measuring room response for simulation. I'd say it is rather easier to design it flat and to have some EQ possibilities for tuning. (For most even bass across the room multiple subs are always better than one or two - according to Harman research papers optimum number for room is usually 4, spatially distributed at ~25% from walls.)

Cons: no calculations for horns (use hornresp instead), TL, TQWT, PPSL and similar other non-common types.

While BassBox Pro is not free, I find it quite good program for designing classical subs, and in my experience simulations are quite accurate.

Quote:
Originally Posted by Vortex View Post
Dear all,

I'd like to build a cylindrical sub with an 18" driver (actually, this would be the bass part of an active 3-way system). Do you have any recommendations, formulas, software, link, whatever .. to correctly tune such a "pipe" woofer accordingly ? Besides high power I'd also need quality sound of these baffles, no peaks, dips, whatsoever.

Drivers are 2 Daytons. Using the cylinder design, woofer would be on the front, facing the listening position and there would be a port on the back. But all other parameters I don't really know yet, e.g. length of the baffle (with almost the same radius what the driver has), port diameter, port length.. (tuned at around 20-25Hz ..)

Last edited by PRTG; 4th December 2017 at 09:48 AM.
  Reply With Quote
Old 9th December 2017, 06:57 PM   #158
Vortex is offline Vortex  Hungary
diyAudio Member
 
Vortex's Avatar
 
Join Date: Jan 2004
Location: Budapest, Hungary, Europe
Send a message via ICQ to Vortex System Pictures & Description
Thanks for the long answer.

I'll give it a try for sure. I'll have 2 drivers (left, right) - a simple stereo active 3-way setup. Some EQ will be possible, I'll first play around with a dbx DSP anyway, then I might switch to DSP-less Linkwitz Riley active circuits on preamp side or stay with the DSP, dunno yet. But if I have an already quite-good basics, that will help a lot.
__________________
Always remember you're unique, just like everyone else.
  Reply With Quote
Old 12th December 2017, 08:42 PM   #159
Infinite Audio NZ is offline Infinite Audio NZ  Australia
diyAudio Member
 
Join Date: Oct 2017
8 x slightly modified ES18's, ready to be painted and loaded with Fane Col's. Next up, finishing the Othorns =D

Click the image to open in full size.
  Reply With Quote

Reply


System Pictures & DescriptionHide 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


New To Site? Need Help?

All times are GMT. The time now is 09:11 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki