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

Multi-Way Conventional loudspeakers with crossovers

Open Source "Tower XL"
Open Source "Tower XL"
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 20th September 2018, 02:17 PM   #1
Aatto is offline Aatto  United States
diyAudio Member
 
Aatto's Avatar
 
Join Date: Feb 2017
Location: Austin
Default Open Source "Tower XL"

Following "Open source speaker project?" and "Open source speaker project - Part II" this thread will be design thread for "Tower XL".

Tower XL Goals : amp friendly (high efficiency) and flattish impedance curve of 8 ohms, low bass extension of 35-40Hz within -3db and cabinet volume will be up to 150 liter. Drivers costs will be maximum of 1000$ for the pair ( excluding crossover parts and cabinet).

Drivers will be chosen to meet the task's goals (no size criteria at this point). Stated goals are not fixed and may change (not drastically) as design team needed.

and of course everyone is welcome to help and participate

Update (10-16-18):
LF Driver:
After more and more discussions we finally came down to two candidates:
Acoustic Elegance TD15X and Fital Pro 15FH520.



Mid-Range: (updated 10-7-18)
Acoustic Elegance TD6M.
18sound 6ND430.
B&C 6NDL38.
__________________
I used to be with it, but then they changed what it was, and now what Im with isnt it. And whats it seems weird and scary to me. - Grandpa Simpsons.

Last edited by Aatto; Yesterday at 03:23 PM.
  Reply With Quote
Old 20th September 2018, 02:18 PM   #2
Aatto is offline Aatto  United States
diyAudio Member
 
Aatto's Avatar
 
Join Date: Feb 2017
Location: Austin
Achieving a high efficiency 8 ohm speaker with low extension is the main factor here and all falls under woofer's territory, so I suggest to start with possible woofer candidates.
__________________
I used to be with it, but then they changed what it was, and now what Im with isnt it. And whats it seems weird and scary to me. - Grandpa Simpsons.
  Reply With Quote
Old 20th September 2018, 03:25 PM   #3
Paul Vancluysen is offline Paul Vancluysen  Belgium
diyAudio Member
 
Join Date: Mar 2009
Location: Heusden-Zolder
Acoustic Elegance TD12S Acoustic Elegance TD12S - Sealed or Vented Box Applications.

For cabinet volume of 130 L and tuned at 35 Hz, F3 = 34 Hz.
Sensitivity is 89 dB full space, 92 dB + sensitivity not met...
  Reply With Quote
Old 20th September 2018, 03:33 PM   #4
Aatto is offline Aatto  United States
diyAudio Member
 
Aatto's Avatar
 
Join Date: Feb 2017
Location: Austin
How about this :
BMS 15N630

can be tuned to 35-36Hz, not such large VAS, and other parameters looks good.
Not sure about the availability tho..
__________________
I used to be with it, but then they changed what it was, and now what Im with isnt it. And whats it seems weird and scary to me. - Grandpa Simpsons.
  Reply With Quote
Old 20th September 2018, 04:15 PM   #5
Aatto is offline Aatto  United States
diyAudio Member
 
Aatto's Avatar
 
Join Date: Feb 2017
Location: Austin
also this
FaitalPRO 15FH520

and this:
Eminence KAPPA-15LFA
__________________
I used to be with it, but then they changed what it was, and now what Im with isnt it. And whats it seems weird and scary to me. - Grandpa Simpsons.
  Reply With Quote
Old 20th September 2018, 05:08 PM   #6
ErnieM is offline ErnieM  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Fresno, CA
AE, BMS, and JBL are the best.

Any reputable brand will work fine though.
  Reply With Quote
Old 20th September 2018, 05:18 PM   #7
andy19191 is offline andy19191  Europe
diyAudio Member
 
Join Date: Apr 2005
Location: -
Assuming this is a tower speaker? A 15" driver will not fit on the front because it is too wide. If it is put on the side it will have to be crossed low like a subwoofer forcing the midrange to become a large midwoofer and compromising upper midrange/tweeter response. This could be handled with a large waveguide on the tweeter but, again, will it fit on a narrow baffle?

So is this a tower speaker or not? If it is not then it might be wise to make that clear so people can make sensible contributions.

What is the width of the baffle? Large, small or no waveguide? What size is the midrange or midwoofer? How many woofers: 4, 2, 1? How many midrange/midwoofers? How are the drivers arranged? What is the minimum sensitivity of the complete speaker and why? Is 40 Hz low frequency extension acceptable for a massive home speaker? Ported, sealed or something else? Open baffle was talked about at one point? Etc, etc...

If the basic configuration hasn't been sorted how can we determine if a suggested driver is or is not suitable?
  Reply With Quote
Old 20th September 2018, 05:56 PM   #8
KaffiMann is online now KaffiMann  Norway
diyAudio Member
 
KaffiMann's Avatar
 
Join Date: Sep 2009
Location: Grua, ten minute walk from 60.258792, 10.664731
Beyma 15WR400

Please remember to leave some cash for the other drivers and xo.
The cheapest option TD12S leaves 171$ for mid, tweet and xo parts per channel.
__________________
FC152

Last edited by KaffiMann; 20th September 2018 at 05:59 PM.
  Reply With Quote
Old 20th September 2018, 06:05 PM   #9
Aatto is offline Aatto  United States
diyAudio Member
 
Aatto's Avatar
 
Join Date: Feb 2017
Location: Austin
Quote:
Originally Posted by andy19191 View Post
Assuming this is a tower speaker? A 15" driver will not fit on the front because it is too wide. If it is put on the side it will have to be crossed low like a subwoofer forcing the midrange to become a large midwoofer and compromising upper midrange/tweeter response. This could be handled with a large waveguide on the tweeter but, again, will it fit on a narrow baffle?

So is this a tower speaker or not? If it is not then it might be wise to make that clear so people can make sensible contributions.

What is the width of the baffle? Large, small or no waveguide? What size is the midrange or midwoofer? How many woofers: 4, 2, 1? How many midrange/midwoofers? How are the drivers arranged? What is the minimum sensitivity of the complete speaker and why? Is 40 Hz low frequency extension acceptable for a massive home speaker? Ported, sealed or something else? Open baffle was talked about at one point? Etc, etc...

If the basic configuration hasn't been sorted how can we determine if a suggested driver is or is not suitable?
yes your assumption is right it is a tower and yes 15" is too large for a front tower style IMO but it is still possible to stay in a tower style foot print, but this is not a fixed set spec, any suggestion how to achieve mentioned "goal" of going low (maximum f3 of 35-40Hz, but the lower the better) and still keep the high sensitivity is absolutely welcome, either using one woofer or 4 as long as it keeps the price and specs as mentioned in first post. width of the baffle, number of woofers/ mid ranges and sizes... is all depends on how to reach the goal and stay within the limits (mostly budget). it would make it easier after we figure out LF part, so it is flexible! I do not know how but if you can get to 35-40Hz with sealed box of mentioned size I do not think anybody would mind but let's say ported to get things simple. no open baffle ( as you see no OB option was in the poll). goal is to keep this as simple as it can be, this will encourage less experienced users. I mean to avoid complicated CNC machined baffles, and also not requiring a carpentry degree ! hope this answer all you questions. almost all this info is available through previous poll and discussions.
__________________
I used to be with it, but then they changed what it was, and now what Im with isnt it. And whats it seems weird and scary to me. - Grandpa Simpsons.

Last edited by Aatto; 20th September 2018 at 06:11 PM.
  Reply With Quote
Old 20th September 2018, 06:07 PM   #10
Aatto is offline Aatto  United States
diyAudio Member
 
Aatto's Avatar
 
Join Date: Feb 2017
Location: Austin
Quote:
Originally Posted by KaffiMann View Post
Beyma 15WR400

Please remember to leave some cash for the other drivers and xo.
The cheapest option TD12S leaves 171$ for mid, tweet and xo parts per channel.
KaffiMann have you seen this, looks good but pricy ...
FaitalPRO 15FH520
__________________
I used to be with it, but then they changed what it was, and now what Im with isnt it. And whats it seems weird and scary to me. - Grandpa Simpsons.
  Reply With Quote

Reply


Open Source "Tower XL"Hide 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
BMS 8CN552 8" coax (Pair) "point source" Soldermizer Swap Meet 0 14th June 2017 04:10 PM
"Digital Line Level" and "Dital Source" forums.. terranigma Forum Problems 7 13th December 2016 06:31 PM
My next project open baffle 4way (15" 12" 10" econo waveguide) help charlie2 Multi-Way 21 28th September 2015 05:25 PM
Delivery Source for the 10cm "HR Vocal Driver" from "4722" LENS (47-lab) wanted tiefbassuebertr Full Range 1 5th September 2014 09:17 AM
"open source" projects need to be done differently prairiemystic Forum Problems 10 5th March 2010 07:17 AM


New To Site? Need Help?

All times are GMT. The time now is 10:25 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki