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SJL1312
(@sjl1312)
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08/08/2019 12:56 pm  

Hello, I am looking for help designing a crossover.  My travel schedule is quite intense with my new assignment so I don't really have the time to design one.  I am looking to build either a TMM or a small 3 way using a tweeter, 5.25 and 8.  Thanks for any help in advance.  I'd be happy to talk privately about details.

Steve


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TVOR-Ceasar
(@tvor-ceasar)
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08/08/2019 1:57 pm  

^^ What Speakerbuilder said plus the type of box you intend to use - Sealed, Ported, etc. can have a bearing on some of the design elements.

-Charlie


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SJL1312
(@sjl1312)
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08/08/2019 3:48 pm  

@speakerbuilder

I do have an idea of what drivers I would like to use in either of the two options. It will be used for movies and music I would like the music to be the focus. As far as size goes maybe somewhere in the 40 to 46 in tall max range. Maybe somewhere in the 10 to 12 in range and with religious depends on which size speakers are used.  If its a TMM ported and if a 3 way I'd like to port the woofer.


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Lindelium18
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08/08/2019 7:13 pm  

@sjl1312

Ok, what drivers?


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SJL1312
(@sjl1312)
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08/08/2019 7:45 pm  

If I do TMM I am looking at either the XT25 or a SB26STAC and a paircof SB17MFC or a 3 way with same tweeters a 5.25 from SB and a Dayton RS225.  That said, I am also open to ideas and input.


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Lindelium18
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09/08/2019 12:37 am  

Well, I’m not as familiar with SB Acoustics but thatSB17MFC has a pretty nasty dip from 65hz thru 40hz... but for that price for that woofer, maybe it could be smoothed (a little) with the tuning of the port.  Also, with just a quick look (headed to bed) that SB26STAC looks pretty nice and linear too.   Are you looking for an 8 ohm final product?


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123Toid
(@123toid)
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09/08/2019 1:50 am  

@sjl1312

The Xt25BG60 is an amazing tweeter.  In fact, I just used it in a custom set of studio monitors.  I didn't look at the other drivers, but I am a fan of TMM's myself.  I am working on the Ugliesas we speak.  I am just finishing up changing of the port.  The reason I bring this up, was I designed mine around movies, so I did a TMM, but 2.5 way.  The way I did it was the top two act like a normal two way and then the bottom woofer is crossed over as a subwoofer to give a bass boost.  This was designed for movies more than music, but the boost is all 120hz and below.  Most who run TMM's as a 2.5 way cross the second driver over at the baffle step.  Either way, there are some benefits including better off axis listening, minimizing wave cancellations, etc that would come with a 2.5 way.  Have you considered a 2.5 way? If not, I would strongly suggest it or consider switching to an MTM or stick with a 3 way.  Just some preliminary thoughts.  I am sure you thought through some of this already.  It sounds like you have. 


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Lindelium18
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09/08/2019 8:06 am  

@123toid

And now I know what a 2.5 way is!


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123Toid
(@123toid)
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09/08/2019 12:21 pm  

@lindelium18

Ha, perfect 😀   It's a nice way to cut down on deconstruction waves.  Run the top woofer full frequency (crossing over to the tweeter).  Then run the second full frequency crossing over at baffle step or below.  I crossed mine over at about 120hz giving a nice little bass boost. Works very good for movies. That's why it is considered a 2.5 way instead of a 3 way.  Since the two drivers actually play part of the same frequency range, but they themselves aren't crossed over. 


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SJL1312
(@sjl1312)
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10/08/2019 9:47 am  

I am open to a 2.5 as well.  Also the SB17MFC isn't set in stone.  I'm open to ideas.  Just want something nice listsen to music on.  


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Lindelium18
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10/08/2019 4:36 pm  

@sjl1312

Do you have an ideal overall budget in mind?


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SJL1312
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10/08/2019 6:10 pm  

@lindelium18

I'd like to try and keep speaker prices around the SB price range per mid.


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Lindelium18
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10/08/2019 11:44 pm  

@sjl1312

Ok, but what about overall?  Sometimes it is better to spend a little less in one spot so you can spend a little more in another...


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SJL1312
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11/08/2019 6:52 am  

I don't really have a budget for the overall project.


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