Tweeter Overlap

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tubbsbright

  • Jr. Member
  • Posts: 3
Tweeter Overlap
« on: 28 Dec 2008, 07:15 am »
What adjustments, if any, would you have to make to a AV-1 or a NeoX to space out the drivers so they don't overlap.  I know they should be grouped closely together, but I think a little gap would help it looks a lot better.

Chops

Re: Tweeter Overlap
« Reply #1 on: 28 Dec 2008, 01:44 pm »
Just cut the driver holes about 1/2" further apart on the baffles.

Keep in mind that even though it may not make much difference in sound by spacing them this small amount, as a rule you want the midbass and tweeter as close together as possible to minimize phase shift and comb filtering between the two drivers, and to also have them sound as much like a point-source as possible. If the drivers are moved too far apart, you will definitely hear two different sources of sound coming from the same speaker cabinet which is not a good thing. Also, the higher the crossover frequency, the closer together the drivers need to be to each other.

tubbsbright

  • Jr. Member
  • Posts: 3
Re: Tweeter Overlap
« Reply #2 on: 28 Dec 2008, 04:57 pm »
Isn't driver offset factored in when they design the crossovers?  I was thinking someone would have to tweak the crossovers to adjust for a different spacing.

Chops

Re: Tweeter Overlap
« Reply #3 on: 28 Dec 2008, 05:05 pm »
Noooo... The crossover points are determined by the drivers and staying well within their limitations. So really, the drivers have to be placed accordingly to integrate properly with the crossover points used.

Danny Richie

Re: Tweeter Overlap
« Reply #4 on: 28 Dec 2008, 06:35 pm »
They overlap for the reasons already mentioned. Altering the spacing will slightly alter the response, especially in the vertical off axis. I wouldn't recommend it.

Don't get too hung up on the looks, it's worth it. Just listen and enjoy.

tubbsbright

  • Jr. Member
  • Posts: 3
Re: Tweeter Overlap
« Reply #5 on: 28 Dec 2008, 11:18 pm »
"Don't get too hung up on the looks, it's worth it. Just listen and enjoy. "

Ha.  Yeah right.  Getting hung up on the looks is half the fun for me.  If there was a strong argument for form following function in this case, I wouldn't mind it...but I'd like to be able weigh the technical value of the drivers being mounted so close together vs the aesthetic value of just mounting them 1/2" higher.


Chops

Re: Tweeter Overlap
« Reply #6 on: 29 Dec 2008, 04:25 am »
"Don't get too hung up on the looks, it's worth it. Just listen and enjoy. "

Ha.  Yeah right.  Getting hung up on the looks is half the fun for me.  If there was a strong argument for form following function in this case, I wouldn't mind it...but I'd like to be able weigh the technical value of the drivers being mounted so close together vs the aesthetic value of just mounting them 1/2" higher.



You could always do an MTM (D Appolito) design, placing another midbass driver above the tweeter. I could be wrong, but I think you can do it this way and get away with a little more distance between the mids and tweeter so they don't overlap. Again, I could be wrong though, so don't take my word to heart just yet. Let Danny or someone else better in the know to advise you as well.

Danny Richie

Re: Tweeter Overlap
« Reply #7 on: 29 Dec 2008, 04:39 am »
The good think about building a kit is that you can build it any way you like.

Obviously the frequency response will be altered slightly. The blending of the drivers will be slightly compromised, and the vertical off axis will vary from the original design as well.

But if you like the looks that much better then you can certainly build it that way.