|
Home | Forums | Rules | Articles | diyAudio Store | Blogs | Gallery | Wiki | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
Multi-Way Conventional loudspeakers with crossovers |
|
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 |
![]() |
|
Thread Tools | Search this Thread |
![]() |
#111 |
diyAudio Member
Join Date: Jan 2016
Location: Kellogg, Idaho
|
Hi Lojzek,
I'm away from my computer today and not able to double check any phase errors that you mentioned. I may be able to shed some light though. All the files that were attached in the above posts were raw measurements that included unwrapped phase in REW without minphase extracted. Now the screenshots of Xsim schematics include files with minphase that has been extracted in Response blender when merging farfield and near fields or RM in the case of the tweeter. Hope that information adds some clarity. ![]() Tony, I feel bad this exercise has turned into a headache rather then something fun. Hopefully, as I type this you have the offsets overlayed correctly. Oh, mic distance for the farfield measurements was 27 inches. I'm still confused why in Xsim there would be any issues aligning offsets. ![]() Best, Rich |
![]() |
![]() |
#112 |
Always Learning
diyAudio Member
|
Out golfing are ya
|
![]() |
![]() |
#113 |
diyAudio Member
Join Date: Jan 2016
Location: Kellogg, Idaho
|
Hi Wish! Boring all day seminar but required to keep my Pesticide license. I'm required by the State of Idaho to have 15 hours continued education every 2 years. So here I am, dreading the start of an incredibly long day. Rather be working on my speaker projects.
![]() Best, Rich |
![]() |
![]() |
#114 |
just another
diyAudio Moderator
|
Don't feel bad Rich, I assumed that the measurements had already had minimum phase extracted!
![]() ![]() That's the reason for doing a sanity check, to make sure what I think I'm working with is actually what I'm working with ![]() Tony. |
![]() |
![]() |
#115 |
diyAudio Member
Join Date: Jan 2016
Location: Kellogg, Idaho
|
Hi Tony,
That makes me feel a lot better that you are not upset with the whole process. ![]() Best Regards, Rich |
![]() |
![]() |
#116 |
just another
diyAudio Moderator
|
Using FRD's with miimum phase works a lot better
![]() I would say that your waveguide combined with this woofer has given you almost perfect time alignment (at least at that measuring mic position). I didn't have to use any z offset at all. + or - 1mm makes small differences but I think overall it is best left at zero in PCD. See below: Also works much better in speaker workshop, but not quite as good a match as PCD. Tony. |
![]() |
![]() |
#117 |
diyAudio Member
Join Date: Jan 2016
Location: Kellogg, Idaho
|
Hi Tony,
That is Awesome! ![]() ![]() Much Thanks! Rich |
![]() |
![]() |
#118 |
diyAudio Member
Join Date: Jan 2016
Location: Kellogg, Idaho
|
Hello Guys,
I'm back once again with another Xover version for consideration. ![]() ![]() Take note the slight differences in frequency response between Xsim and PCD7. I think the differences could be that in PCD7 I changed the listening distance to 2.00 meters and Xsim it is based on .686 meters (true mic measurement distance). I could have imported a summed response from PCD into Xsim with 2.00 meter distance but have not done that as of yet. I probably will be using PCD7 to make any minor design changes and use Xsim to print a nice schematic to build the Xover. Also, I have attached woofer and tweeter sections from PCD7. Please let me know if it does not match to Xsim schematic in regards to parts layout. I really appreciate the excellent advice and direction that has been offered in this thread! ![]() Thanks To All, Rich |
![]() |
![]() |
#119 |
diyAudio Member
Join Date: Jan 2016
Location: Kellogg, Idaho
|
And one more Xsim version....
This version has not been changed much from prior post but does reflect an offset adjustment. I took a summed response from PCD7 at 2 meter listening distance and imported it into Xsim. It required reducing tweeter mod delay from 1.22 to .44 inches to align overlays. You can see now that both PCD7 version and Xsim agree. Also, I removed resonant compensation filter from schematic. It probably is not altogether necessary other then to flatten impedance some. Guys, let me know if I can go to press with this version. ![]() Best, Rich |
![]() |
![]() |
#120 |
diyAudio Member
Join Date: Feb 2012
Location: Croatia
|
Rich, post the XSim dxo file zipped, perhaps the filter can be made simpler.
__________________
A good dialogue makes you feel like a changed person, not like you have won or lost the competition. |
![]() |
![]() |
Thread Tools | Search this Thread |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Help interpreting room acoustics measurements | kaputt | Multi-Way | 13 | 20th August 2017 10:20 AM |
Interpreting specs | akis | Chip Amps | 5 | 23rd March 2014 07:55 PM |
Need help interpreting measurements | jimjimmyjimjim | Multi-Way | 5 | 26th September 2013 07:52 PM |
Interpreting T/S Parameters | fringy75 | Full Range | 6 | 19th April 2013 06:46 PM |
help interpreting graph | getafix | Multi-Way | 6 | 12th October 2003 12:52 AM |
New To Site? | Need Help? |