[fdandrews]

These were my test speakers to see if I liked the open baffle sound. Drivers are Alpha 15 woofs, Pioneer "BOFU" 8" full range, and Dayton Audio tweets with a single cap crossover. Although they were only supposed to be a temporary test set, they stayed in the system for 2 years until I built the next pair of OBs.

[fdandrews]

Aaaargh! If someone could tell me how to turn the photos 90 degrees, I would appreciate it.

[Blackmore]

If you click on your image in "My Gallery" you can get rotate left, rotate right and delete buttons.  Hope that helps.

[fdandrews]

Thanks.

[Poultrygeist]

Nice.

Did you cut off the BoFu whizzers?

Which Dayton tweeters are you using and the cap value?

Thanks

[fdandrews]

Yup. Cut off the whizzers after trying various combinations of stock BOFUs by themselves, BOFUs with Dayton 5/8" tweets (don't remember which ones), BOFUs with planar tweets, etc. This was just a test of the concept to see if it would work in my room. I have a few BOFUs in the basement, so I tried a whizzerectomy on this pair. Liked it enough to build new speakers which I describe in a separate post. It is more about the journey than the destination.

[mordikai]

Is that a brown belt around the alpha magnet? How's it work for damping?

[fdandrews]

It is Mortite window caulking. Several layers around the magnet and between the magnet and frame for damping.

[nicoch]

nice work !

[fdandrews]

Thanks. These were supposed to be a temporary test speaker to see if I liked the open baffle sound in my room. They ended up staying there for 2 years (with various mods) because they worked so well.

[nicoch]

time to try a better fullrange

[fdandrews]

Yup. I am now using the Fostex 166en running full range with a helper woofer on the bottom. Thinking of adding a tweeter on top crossed over above 10k. Working on the crossover for it today. Not going to use a crossover on the Fostex.