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Crossover worknight 2 and 3

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S Clark

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Crossover worknight 2 and 3
« on: 20 Apr 2010, 08:01 pm »
Three groups worked on crossovers last night and I've got 3 more tonight.
Last nights groups all had problems to figure out, and all realized what I had told them all along, speaker design is all about compromises. 



This group wanted "something interesting and challenging".  They came up with a MMTMM 2.5 way that has real promise. The following FR curve shows their efforts. 



The next group had what should have been a straight forward 6 1/2" two way, but the tweeter measured odd and we had a devil of a time getting something that would work.



And last was a prototype woofer that should have gotten more bass than we did- I suspect that the box may not be right.  You can see they had a phase problem that they got fixed.



Got to go and head to school.  More work to be done tonight.  :thumb:
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S Clark

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Re: Crossover worknight 2 and 3
« Reply #1 on: 21 Apr 2010, 05:06 am »
And here is the last one for the evening.  Here are three girls holding the schematic they designed for a GR-Research M130 woofer and a Vifa D19 tweeter.  That M130 is an absolute dream to work with- so easy, so smooth.


And although this photo is a bit hard to see, the range is 200-20K Hz.  This is going to sound good and be tough to beat.  Several of the projects this year have real potential. 



Dang, +- 1.5 dB over most of the audible range!
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S Clark

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Re: Crossover worknight 2 and 3
« Reply #2 on: 22 Apr 2010, 02:30 am »
I was looking at FR curves at several sites where the M130 has been used.  Those last three girls have put together a design that is right there with some of the best (some of our pros even).  I'm really eager to see how a pair of them sound- pretty impressive for both the kids and those drivers! :thumb:
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dBe

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Re: Crossover worknight 2 and 3
« Reply #3 on: 22 Apr 2010, 07:51 pm »
Quote from: S Clark on 22 Apr 2010, 02:30 am
I was looking at FR curves at several sites where the M130 has been used.  Those last three girls have put together a design that is right there with some of the best (some of our pros even).  I'm really eager to see how a pair of them sound- pretty impressive for both the kids and those drivers! :thumb:
Scott, it is great to see young people having fun.  That and they'll have a memento of the experience that they can enjoy for years.  Great thing you are doing there!

Dave
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HAL

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Re: Crossover worknight 2 and 3
« Reply #4 on: 22 Apr 2010, 08:00 pm »
Three girls and two speakers.  I wonder how they will work that out?  Stereo does not work well with 0.6667 channels, even with rounding.   :wink:
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