Originally Posted by chrapladm
Most of the stuff I own is all DIY. The Mains I have only built two types. I have built lots of different subs. SO its just a matter of getting acquainted to what is in the 5-6000 dollar range for three speakers is all.
I used to love my old Studio 20's from Paradigm. Had some Martin Logans and my favorite speakers were the B&W's. I have only been able to afford the book shelf size B&W's but with the old Servo 15 they rocked. Then came DIY.
Its sometime hard to pay for speakers that seem so simple. I could build the JBL's but I cant build the Synergy Horns from DSL. SO with some designs I dont mind paying for because I wont save enough. My next DIY project was going to be some Jubilee/Jamboree bass bins with a 402 horn. But after figuring shipping, materials and other costs it ends up being about $5000.
SO if I cant save enough money by going DIY then I will just buy the speakers. SO with me building the clones it saves me quite a bit but there are a lot of contenders in the $6K for L/C/R manufacturers. SO being stuck in the DIY world is why I wondered what all is out there.
PLUS I know I should get the room built first but its fun demo'ing speakers when you can. Gets the mind off of life and how far away goals are.
Examining a hypothetical flowchart that directs one toward loudspeakers with robust characteristics that lend themselves well to high playback levels, with a high degree of linearity and a measure of directivity control. While progressing the flowchart, we're presented with "pro audio" style designs, with high sensitivities, high power handling. We also encounter compression drivers, and horns and waveguides.
Many of us here are well versed in the advantages of such designs, as many of us are well aware of the dis-advantages of such designs. The potential pros
are relatively obvious; robust designs with high, and clean SPLs, directivity control offering less room/more recording, matched directivity between drivers at the crossover, reduction in horn coloration (horn honk), optimized response in the time and frequency domain, low diffraction and entirely inert cabinetry.
The potential cons
being poor response in frequency and time domain, mis-matched directivity/off axis behavior around the crossover region, diffraction from sharply terminated edges from horn or cabinet/thus creating aberrant VER (very early reflections), horn coloration from HOM (higher order modes), boxy colorations from various issues.
It is relatively straightforward, and highly rewarding to implement a high sensitivity/high output design using pro drivers and horn/waveguide components. The real difficulty lies with an ideally optimized design
combined with a perfectly inert and diffraction free cabinet. That's were offerings from Wayne Parham, and products from JBL, Meyer and others really get you closer. However, it appears that if one were to strip away all potential negatives of a pro approach, and throw in a relatively inert and diffraction free cabinet, Geddes work is what is left. The Summa (15" two way) isn't currently offered, however the solid polyurethane,
12" two way Abbey,
appears to be a very solid performer.
Here's a quote from Dr. Earl Geddes;"I don't mind people building their own speakers, but I do think that it is unreasonable to think that you could improve on mine or even match them. Let's face it, that's not realistic. I have a great setup for measurements, which very few people have, custom design tools that would be virtually impossible for you to match and vast experience to make it all come together. And lets not forget that this line of speakers has been in continuous development for almost seven years now. Thats a lot of optimization. So if you build your own speakers because it's fun then go for it, but you're kidding yourself if you are doing it because you think that you can do it better."
At the very least, interesting.
Thanks and good luck