High School speaker builders

5" unknown Taiwan Al driver	5" Al woofer FR curve shot in an 8" baffle	Tweeter model 842001 impedance	tweeter model 842001 frequency response
Working with the Clio on crossover. This is a MMTMM with 4" woofers. The challenge was to get enough bass.	Finally, they got most of what they wanted creating a 2.5 way. We still aren't through as the impedence is a bit low for comfort, getting down to 3.5 ohms	This one worked pretty well with a first order on the tweeter- but looking at acoustics it is a very steep curve, over 18 db/ octave. They should be alright. This is 6" Dayton classic and an AV123 tweeter.	This one is a prototype 6 1/2" woofer that just isn't giving us the bass that it should. You can see that the kids fixed one of the problems with phase and have a very flat curve, but this one needs more work.
The students brought their speakers up for our first crossover worknight. We spent about 5 hours on three projects- and more tomorrow!	These girls really understood their crossover and what each part did- and it shows in their speaker.	This about as flat as it gets!	This is an MTM using the MCM 4" mod. 55-1870 and an AV123 tweeter. Using only a cap on the tweeter and an inductor on the woofer, it provides an 18 dB drop at 2500 using the natural drop of the tweeter. Pretty flat response - 2 bB. Another good project!

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