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

3-Way Build Project - Woofer help
3-Way Build Project - Woofer help
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 14th March 2017, 06:32 PM   #241
jReave is offline jReave  Canada
diyAudio Member
 
Join Date: Oct 2012
OK that's better. The design is for just the mid to be reversed in polarity. Try that out for a while and see how you like it.

The speakers are rather low in sensitivity but that's what you get when you're only running 1 smaller woofer in a 3-way and going for full baffle step compensation, so yes, you can expect to be pushing your amp a little harder if your other speaker was higher in sensitivity. But you should be getting more bass I hope, and better quality too, but if you are finding there is too much, then you can decrease the series resistors on the mid and the tweeter and that will simultaneously decrease the perception of bass and improve the sensitivity a little bit. You might try a decrease of up to around 3ohm for each driver and see how that goes.

It's possible there is another little thing happening whereby a speaker with more distortion will sound louder than it is (ie, your old ones), or in other words, with a cleaner speaker you may be playing it louder than before but you don't really realize it because there isn't so much distortion.

As I say, try them for a little while and get to know them better. Then you can measure again and compare that to your subjective reactions. Maybe toy with the resistors as you see fit. One thing I didn't mention previously is that if you aren't playing these too loud, then you might prefer a bit of a smiley face curve, so with the mids just a little lower than the bass and highs. Then if need be you can look at what spare parts you have on hand and we can try to tweek a couple of little things if you want.

Happy listening. Hope you don't have any other important things to do right now.
  Reply With Quote
Old 14th March 2017, 06:54 PM   #242
spark010 is offline spark010  United Kingdom
diyAudio Member
 
Join Date: Feb 2016
Location: Manchester
I've just simmed removing 3ohm from the tweeter and 5ohm from the Mid and it looks pretty good

I'll have to order in a couple of resistors for the mid but the tweeter-tweak is very easy to achieve.

Very interesting comment on distortion and volume! I'll keep that in mind

Thank you again I'll hopefully have them up and running by Thursday and yeah i should be doing other things... but..
  Reply With Quote
Old 14th March 2017, 07:05 PM   #243
jReave is offline jReave  Canada
diyAudio Member
 
Join Date: Oct 2012
Sounds good.

Maybe try both of them without the tweeks first. Something else to note is that your old speakers might not have had the best balanced FR but that is what you are used to. So anything new is going to sound different, maybe weird at 1st in comparison and that's why I say try them out for a while, get used to them and then start to change things to discover your preferences.

One other thing to note is that I think with your placement, 1 speaker is close to a wall and the other is more out in free space so this will affect the bass differently and so it's the balance of the 2 of them that you need to get right.
  Reply With Quote
Old 14th March 2017, 07:40 PM   #244
spark010 is offline spark010  United Kingdom
diyAudio Member
 
Join Date: Feb 2016
Location: Manchester
Do you think that it might be a good idea to use an attenuator on the mid and tweeter to adjust and get the balance stop on? It would give me the benefit finishing the project and being able to sit back listen and tweak whilst i get used to the different FR
  Reply With Quote
Old 14th March 2017, 08:02 PM   #245
spark010 is offline spark010  United Kingdom
diyAudio Member
 
Join Date: Feb 2016
Location: Manchester
Just before I forget.. The woofer enclosure doesn't have any wadding / stuffing. I assumed that was ok?
  Reply With Quote
Old 14th March 2017, 08:02 PM   #246
jReave is offline jReave  Canada
diyAudio Member
 
Join Date: Oct 2012
Well I would just add or subtract resistors but then again, I wouldn't hard solder them to start off with because I know I'm going to want to play with them a bit. I've got a little collection of alligator clips that I use for temporary connections but even twisting leads together can work if you are gentle with them. But be careful with that because too much and some of the leads may fall right out of the component.
  Reply With Quote
Old 15th March 2017, 08:06 AM   #247
USRFobiwan is offline USRFobiwan
Horn Addict
diyAudio Member
 
USRFobiwan's Avatar
 
Join Date: Oct 2014
Location: Haarlem
3-Way Build Project - Woofer help
why not temporary use a rheostat in between. this way you can actively doe measurement and measure the potential after you are happy with the result and replace the rheo with a resistor.
__________________
Destroyed some nostalgia
For the love of Horns and glory of pressure waves.
  Reply With Quote
Old 15th March 2017, 03:57 PM   #248
jReave is offline jReave  Canada
diyAudio Member
 
Join Date: Oct 2012
Quote:
Originally Posted by spark010 View Post
Just before I forget.. The woofer enclosure doesn't have any wadding / stuffing. I assumed that was ok?
Usually the walls are lined with foam or heavy felt or some kind of absorptive insulation. Any more stuffing inside the cabinet is likely to start reducing the output from the port, which in some cases is not necessarily a bad thing.
  Reply With Quote
Old 16th March 2017, 06:54 AM   #249
spark010 is offline spark010  United Kingdom
diyAudio Member
 
Join Date: Feb 2016
Location: Manchester
Quote:
Originally Posted by USRFobiwan View Post
why not temporary use a rheostat in between. this way you can actively doe measurement and measure the potential after you are happy with the result and replace the rheo with a resistor.
I do like the idea of using some form of variable resistor to help tweak things. However after looking into it, the costs are quite prohibitive. e.g. audio grade fixed resistors are 1-2 where l-pad's or rheostat's are circa 50.
  Reply With Quote
Old 19th March 2017, 08:47 AM   #250
spark010 is offline spark010  United Kingdom
diyAudio Member
 
Join Date: Feb 2016
Location: Manchester
I'm revised the XO a little and here the new FR.. The sounds balance seems much better but perhaps a little too much treble.

One thing that seem off is. The mid range is pretty muted and when I play much that is dynamic and fast paced, the mid is muffled / laggy.
Attached Images
File Type: jpg Capture 001.JPG (142.7 KB, 64 views)
  Reply With Quote

Reply


3-Way Build Project - Woofer helpHide 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
Looking to build some big 3 way's Need some help deciding on the woofer. Boscoe Multi-Way 11 5th October 2010 09:20 AM
Dual Duty Woofer Build AcridSaint Subwoofers 9 20th March 2010 07:38 PM
Sub-woofer project hybridfiat Subwoofers 13 8th December 2008 05:22 AM
How to build a sub woofer?? dsantamassino Subwoofers 3 22nd February 2004 05:39 PM


New To Site? Need Help?

All times are GMT. The time now is 02:01 PM.


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