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Back in November, I bought a bunch of Jamo close-out drivers, 6 of 20306
5 1/4 mid/woofers and 4 20452 1" dome tweeters for about $6.00 per driver.
To make a long story short, I ran into many problems tops among them was there was no published specs for either driver. I thought I could do some measurements of the drivers but measurement is another can of worms. I was stuck. I had a nice cabinet but a few trys with crossover design led nowhere. I shelved the preakers for a number of months but kept reading and thinking I'd give it another go.
A couple weeks ago, Zilch referenced a crossover design site that he thought would help rookies,"sound.westhost.com/lr-passive.htm". This has been a breakthrough for me. I followed Elliott's method of crossover design, and the first crossover I designed using his method was shocking. Far and away better than anything I had come up with, not perfect but on the right track. I made 4 more changes and I gotta say holy crap, I have a speaker! The sound is incredible for a little .28ft^3 enclosure ported with 4-7/8" long 2" port. Wide deep soundstage, amazing bass for such a dinky system, nice smooth mids (piano is real with nice overtones), a non fatiguing high end. I can't get over them.
LP: 2nd order, using Gonzale's number of .35 for baffle step. L1 = .5mh, c1=2.4uf, zobel r=6ohm, c= 48uf.
HP: 2nd order with impedence compensation and L-pad. c2=3.5uf, L2=.35uf.
CLR filter: c=22uf, L=.35mh, R=7ohm. L-pad Rs=3ohm, Lp=4ohm.
The next project is to use the drivers in an MTM cofiguration.
5 1/4 mid/woofers and 4 20452 1" dome tweeters for about $6.00 per driver.
To make a long story short, I ran into many problems tops among them was there was no published specs for either driver. I thought I could do some measurements of the drivers but measurement is another can of worms. I was stuck. I had a nice cabinet but a few trys with crossover design led nowhere. I shelved the preakers for a number of months but kept reading and thinking I'd give it another go.
A couple weeks ago, Zilch referenced a crossover design site that he thought would help rookies,"sound.westhost.com/lr-passive.htm". This has been a breakthrough for me. I followed Elliott's method of crossover design, and the first crossover I designed using his method was shocking. Far and away better than anything I had come up with, not perfect but on the right track. I made 4 more changes and I gotta say holy crap, I have a speaker! The sound is incredible for a little .28ft^3 enclosure ported with 4-7/8" long 2" port. Wide deep soundstage, amazing bass for such a dinky system, nice smooth mids (piano is real with nice overtones), a non fatiguing high end. I can't get over them.
LP: 2nd order, using Gonzale's number of .35 for baffle step. L1 = .5mh, c1=2.4uf, zobel r=6ohm, c= 48uf.
HP: 2nd order with impedence compensation and L-pad. c2=3.5uf, L2=.35uf.
CLR filter: c=22uf, L=.35mh, R=7ohm. L-pad Rs=3ohm, Lp=4ohm.
The next project is to use the drivers in an MTM cofiguration.
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