Welcome, Guest
Username: Password: Remember me
NOTE: This is a "Community" forum. Please be mindful that community members are here to help as part of a community effort. We therefore appreciate your effort in keeping this forum a happy place!

If you have a specific issue (e.g. hardware, failure) and want help from our support team, please use our tech support portal (Support menu - > Contact Us).
Thanks a lot of your help in making a better community.
  • Page:
  • 1

TOPIC:

Active 2 way speaker with shd studio 10 months 1 week ago #52449

  • kenlam430
  • kenlam430's Avatar Topic Author
  • Offline
  • New Member
  • New Member
  • Posts: 2
  • Thank you received: 0
Hi everyone.
I'm starting my new project of 2 way active speaker with shd studio.
Should i just decide the crossover point (no notch filters, transforms..) and run DIRAC Live to achieve flat reponse?
Thanks

Please Log in or Create an account to join the conversation.

Last edit: by kenlam430.

Active 2 way speaker with shd studio 10 months 1 week ago #52451

  • entripy
  • entripy's Avatar
  • Offline
  • Platinum Member
  • Platinum Member
  • Posts: 330
  • Thank you received: 95
Yes

Please Log in or Create an account to join the conversation.

Active 2 way speaker with shd studio 10 months 1 week ago #52457

  • miket
  • miket's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 54
  • Thank you received: 10
I'm using SHD for crossover between main speakers (which are full-range so they don't have a crossover) and subwoofers (2.2 configuration).

I tried 2 approaches:
(a) Just set crossover in SHD and then used Dirac.
(b) Used REW to do some correction so that measured response (rather than theoretical response) fitted closely to required crossover. This mainly involved correcting 2 peaks in response at 30Hz and 60Hz caused by room modes.

I found that with (a) Dirac over-corrected because of the room modes. Approach (b) achieved a better overall measured response.

With 4 Dirac slots on the SHD you can try different combinations and compare them.
The following user(s) said Thank You: kenlam430

Please Log in or Create an account to join the conversation.

Active 2 way speaker with shd studio 10 months 1 day ago #52692

  • Juoigâ
  • Juoigâ's Avatar
  • Away
  • Elite Member
  • Elite Member
  • Posts: 236
  • Thank you received: 44
you should not just set an x-over and hope for magic, the individual responses should add-up correctly, for that to happen the individual phases should align, Dirac cannot do that for you.

a general approach:
  • measure each driver individually, same mic position. at least at listening angle, but preferably also off-axis. do a gated measurement to eliminate room influences; this should be the (quasi) anechoic response of the units
  • using the DSP make the responses "flat" for at least 2 octaves (more if you intend a low order filter) outside the x-over point. if you see disturbances that disappear under a different angle, than usually these need no correction
  • set the correct delay to time-align the units
  • apply x-over
  • listen
  • try different x-over (slope, freq)
  • listen
  • repeat
  • optimise overall response with DSP of Dirac
The following user(s) said Thank You: kenlam430

Please Log in or Create an account to join the conversation.

Active 2 way speaker with shd studio 10 months 1 day ago #52693

  • Juoigâ
  • Juoigâ's Avatar
  • Away
  • Elite Member
  • Elite Member
  • Posts: 236
  • Thank you received: 44

...... crossover between main speakers (which are full-range so they don't have a crossover) and subwoofers (2.2 configuration)...

just like I have. in this case the measurements I describe in the previous post should be made close range (like 1cm in front of the dustcap) of the sub and of the bass unit of the main speaker (in case this is a ported box you'll see the dip from the port, that should be ignored of course), make that flat and proceed ...
The following user(s) said Thank You: kenlam430

Please Log in or Create an account to join the conversation.

  • Page:
  • 1
Moderators: devteam