Some pics for ya
03-23-2004, 08:18 PM
#11
1000 Watt CAFz'r
Join Date: Oct 2003
Posts: 1,783
I think it's a very cool idea, let us know how it works.
As to the midrange driver spacing:
Going to a smaller tweeter such as a Morel MDT 39 or 40 will be a trade off. You do get some added benifit from having the mids closer together,(less directional response off axis) but the lower quality of the smaller tweeter sometimes isn't worth it. In general, having the tweeter baffle cut along the top and bottom edge to mount the mids closer together has a better result. With most good tweeters, you should be able to cut about 1/2" from both the top and bottom of the tweeter baffle. (although the Focal TLR doesn't count!)
Adam
As to the midrange driver spacing:
Going to a smaller tweeter such as a Morel MDT 39 or 40 will be a trade off. You do get some added benifit from having the mids closer together,(less directional response off axis) but the lower quality of the smaller tweeter sometimes isn't worth it. In general, having the tweeter baffle cut along the top and bottom edge to mount the mids closer together has a better result. With most good tweeters, you should be able to cut about 1/2" from both the top and bottom of the tweeter baffle. (although the Focal TLR doesn't count!)
Adam
03-24-2004, 11:41 AM
#13
Guest
Posts: n/a
George would like to point out that used in a horizontal location you certainly want to sink the tweeter back inside the cabinet slightly to keep the voice coils of the tweeter and the midrange equal essentially creating a manual time alignment which will help in a more equal dispersion pattern between the drivers.
03-24-2004, 08:45 PM
#15
1000 Watt CAFz'r
Join Date: Oct 2003
Posts: 1,783
Just an idea about the tweeter recession:
I've found that while it is a good idea in theory, the passive X.O. may already do this for you. (Ie: 2nd order midrange low pass, and 3rd order tweeter highpass around 2.5khz) Having spent a lot of time doing listening tests for this exact situation, I'd suggest using spacers under the midrange drivers to test out the theory. Yes, you will get defraction issues with the tweeter by doing this, but you'll easily be able to hear the phase changes in your sound stage.
Test, test, test...the answer is usually a compromise anyway.
Great to see you stepping it up Dereck, this is not an easy route to take.
Adam
I've found that while it is a good idea in theory, the passive X.O. may already do this for you. (Ie: 2nd order midrange low pass, and 3rd order tweeter highpass around 2.5khz) Having spent a lot of time doing listening tests for this exact situation, I'd suggest using spacers under the midrange drivers to test out the theory. Yes, you will get defraction issues with the tweeter by doing this, but you'll easily be able to hear the phase changes in your sound stage.
Test, test, test...the answer is usually a compromise anyway.
Great to see you stepping it up Dereck, this is not an easy route to take.
Adam
03-25-2004, 06:00 PM
#18
Guest
Posts: n/a
What were the name of the home loudspeakers that had an etremely angled front baffle to physically time align the tweeter and the midrange? Audio Excellence had a pair here about 11 years ago but I didn't pay much attention to them since there was a nice big set of Maggies beside them that kind of stole the spotlight.
03-26-2004, 06:07 AM
#19
1000 Watt CAFz'r
Join Date: May 2002
Posts: 1,649
Well I have been bragging how good my car is gonna sound for 4 years, so it has to blow people away
[ March 26, 2004, 07:07 AM: Message edited by: dawgsbreakfast ]
03-26-2004, 07:17 AM
#20
1000 Watt CAFz'r
Join Date: Aug 2002
Posts: 1,239
Originally posted by DWVW:
What were the name of the home loudspeakers that had an etremely angled front baffle to physically time align the tweeter and the midrange? Audio Excellence had a pair here about 11 years ago but I didn't pay much attention to them since there was a nice big set of Maggies beside them that kind of stole the spotlight.
What were the name of the home loudspeakers that had an etremely angled front baffle to physically time align the tweeter and the midrange? Audio Excellence had a pair here about 11 years ago but I didn't pay much attention to them since there was a nice big set of Maggies beside them that kind of stole the spotlight.
will bring the drivers in phase.
Its been said that a slope baffle to compensate for out of phase drivers is not worth the effort.
comment?
