Jump to content



Sign up for a free account to remove the pop-up ads

Signing up for an account is fast and free. As a member you can join in the conversation, enter contests and remove the pop-up ads that guests get. Click here to create your free account.

Photo
- - - - -

Sub + BFD: Calibrate in Pro Logic or Stereo?


  • You cannot start a new topic
  • Please log in to reply
3 replies to this topic

#1 of 4 OFFLINE   Mat_M

Mat_M

    Stunt Coordinator



  • 225 posts
  • Join Date: Jan 03 2003

Posted April 03 2003 - 07:18 PM

I'm getting ready to equalize my sub again since I've made some room changes. Now, I know most people recommend setting all speakers to small and let the sub handle all the lows, but after several trial runs with small/large/sub on/sub off settings, I find that the best sound (to me) is setting center and rears to 'small', setting fronts to 'large', and setting sub to 'on'. I use the excel sheet found on http://www.snapbug.ws/bfd.htm and the sine wave test tones to get a frequency response curve.

It has been stated several times on this board to equalize the sub with the front speakers on, and I plan on doing just that. The test tones are burned onto a cd. This means that since the source is NOT 5.1, I must put the sound mode in either Pro Logic or stereo. The $20,000 question is this: Should I equalize the sub while my pre/pro is in Pro Logic mode or in stereo mode, both of which utilize the sub? There are considerable volume differences between the two modes. I do not know if the relative volume between the sub and mains changes between modes, so I was hoping some people have some insight with this.

Thanks!

#2 of 4 OFFLINE   MingL

MingL

    Stunt Coordinator



  • 214 posts
  • Join Date: Mar 26 2003

Posted April 03 2003 - 09:28 PM

I prefer to EQ while I'm running on stereo, then cross-over the PL, PL2 or any other mode to ensure the bass is still smooth. I find that the relative sub volume can change with respect to the surround mode I change, but the bass response should still remain relatively flat. Volume diff aside, the properly BFD should still maintain the relatively flat response in any surround mode. The main reason I cal to stereo is that I can be certain the bass response and volume remains correct while listening to 2-stereo music which I'm slightly more critical of.

#3 of 4 OFFLINE   Wayne A. Pflughaupt

Wayne A. Pflughaupt

    Producer



  • 5,943 posts
  • Join Date: Aug 05 1999
  • Real Name:Wayne
  • LocationKaty, TX

Posted April 04 2003 - 09:56 AM

[quote] I find that the best sound (to me) is setting center and rears to 'small', setting fronts to 'large', and setting sub to 'on'. [quote] The problem with this approach is that the room will probably have the same effect in response on both the sub and mains in the range that they are both operating. However, you will be able to equalize the room’s effect on sub the only.

Regards,
Wayne A. Pflughaupt

My Equipment List
“A nice mid-fi system,” according to an audiophile acquaintance.

My Tech / DIY Articles and Reviews

#4 of 4 OFFLINE   Mat_M

Mat_M

    Stunt Coordinator



  • 225 posts
  • Join Date: Jan 03 2003

Posted April 04 2003 - 11:56 AM

That should work just fine because on my initial measurements my room response didn't have any bad nulls. Thanks for the input!




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users