paul_n_oneal
03-19-2006, 04:24 PM
http://home.stx.rr.com/poneal/final.jpg
To Tom and all who care. I had to make a decision as to whether to make new baffles and turn this into an MTM, turn it into a 2.5 way or leave it as is. The cost constraints of a 2.5 turned me a little sour even though I did get it to model fairly well--I think. In the end I decided to leave it as a two way. An article on PJays site made up my mind. Here's the link to that article.
<A HREF="http://members.aol.com/_ht_a/pjay99site/speakerhome.html">http://members.aol.com/_ht_a/pjay99site/speakerhome.html</A>
I spent well over 30 hours on this crossover and tried 3 different ones. The last one was almost there but after final measuring I had to tweek the tweeter down and there was a hugh null at 500 instead of the before peak. Had to just play around swapping out components until it measured right. You will notice the 3.5db dip at the crossover. But look at the 30 degree off axis(RED). It smooths out very, very nicely into about a +/- 1db until around 10khz. Thus this does not need any toe in and probably will sound a little lacing if toed in. The soundstage is very wide. OK, how about the bass. You mentioned that the bass only went to 100hz. In this box the F3 is right around 60hz. Box is 1.5cf. In room response indicates bass to the mid 40s. I haven't noticed any lobing problems just nice sound. The impedance is right at 6ohms but most would call this an 8ohm speaker. Easy to drive, decent efficiency, and for a basically unheard of design in these neck of the woods a speaker that sounds damn good. More than the buyout price indicated. So all I have to say is sometimes the unorthodox works. You just have to be patient and try and try again. Now that I have finished this I need to pickup all those xover parts strewn all over the workshop while I was swapping out components. I can almost guarantee you that you will like this xover. Cheers, Paul.
To Tom and all who care. I had to make a decision as to whether to make new baffles and turn this into an MTM, turn it into a 2.5 way or leave it as is. The cost constraints of a 2.5 turned me a little sour even though I did get it to model fairly well--I think. In the end I decided to leave it as a two way. An article on PJays site made up my mind. Here's the link to that article.
<A HREF="http://members.aol.com/_ht_a/pjay99site/speakerhome.html">http://members.aol.com/_ht_a/pjay99site/speakerhome.html</A>
I spent well over 30 hours on this crossover and tried 3 different ones. The last one was almost there but after final measuring I had to tweek the tweeter down and there was a hugh null at 500 instead of the before peak. Had to just play around swapping out components until it measured right. You will notice the 3.5db dip at the crossover. But look at the 30 degree off axis(RED). It smooths out very, very nicely into about a +/- 1db until around 10khz. Thus this does not need any toe in and probably will sound a little lacing if toed in. The soundstage is very wide. OK, how about the bass. You mentioned that the bass only went to 100hz. In this box the F3 is right around 60hz. Box is 1.5cf. In room response indicates bass to the mid 40s. I haven't noticed any lobing problems just nice sound. The impedance is right at 6ohms but most would call this an 8ohm speaker. Easy to drive, decent efficiency, and for a basically unheard of design in these neck of the woods a speaker that sounds damn good. More than the buyout price indicated. So all I have to say is sometimes the unorthodox works. You just have to be patient and try and try again. Now that I have finished this I need to pickup all those xover parts strewn all over the workshop while I was swapping out components. I can almost guarantee you that you will like this xover. Cheers, Paul.