The Decware  ZROB is an interesting design that I have been planning on making a DIY version for about a year now.  I am curious how an OB design sounds and the omni flip design peaked my curiosity.  Well I just lucked into a new unused pair of Lii Song Fast F-15’s for $250 + $40 shipping.  I used scrap particle board etc. at no cost to make a prototype to see if it warrants making one of solid wood. With only 10 hours of use these speakers have some incredible potential.  The detail, clarity, highs and upper mids, 3D huge room filling soundstage excel.  Bass and lower mids are definitely lacking but the speakers are improving as they break in.  I do feel with the size of my baffles  that a sub is required,which I  have, and was expected. Size of my baffles are 24x18”, they have a 10 degree tilt on standard set up with an adjustable tilt of 38 to 42 degrees on the flipped Omni set up. The 42 degree Omni is currently preferred in my HT room using a Taboo amp with Zrock 3.  It’s been a fun project for minimal cost  to satisfy my curiosity.

Tom, nice work on the ZROBs. Your material costs were minimal, and the prototypes look fantastic. It sounds like you have plans to replace the particle board at some point, any idea what kind of wood you might use for a final design? The bottom line is that you like what you've got now, and that's exciting.

Good workmanship and creative.

Tony- Thanks for the kind words and encouragement.  If these are keepers after break-in and adjustments I have some 3/4 inch Brazilian Cherry floor planks that I could use to do a trim around the sides of this design.  I also have leftover walnut veneer from my Sonido speaker build I can use as well.  Or if I decide to only use it for omni I might contact Randy to see if he will make one of his standard Caintuck thick baffles with an extended base that I could cut and add hinges similar to my prototype for angle adjustment.  So many things to consider.  These ZROB-like prototypes seem to amaze  me  in omni set up and they keep getting better with break-in.

Donnie-Thanks for your words of wisdom and input.  Tweeters are probably in my future. It’s hard to stop the constant need to improve.  I always value words of advice from experienced fellow Decheads!  

Hey HA,

I was looking for this thread when I added the following to the General Topics section:

I see that you built a DIY ZROB, and I’m wondering if you checked out the new Lii Song Ting horn tweeters. They have a crossover that gives you three options for volume attenuation, and are made to add to the Lii full range drivers, esp the F15 and the Fast 15.  Randy has pictures on his website, and a little write up in the Speakers section of this forum.

(The Other) Randy

HA,

Those tweeters look cool, and I’ve had good luck with pleated diaphram tweeters. As a matter of fact, the speakers that I’m using for my computer setup are Martin Logan bookshelf speakers with pleated diaphram tweeters.

Also, I noticed in one of the earlier threads that you have Alan Eaton 45 monoblocks. I loved mine, and then I found an amp that he built with the power in a separate chassis. Turned out to be quieter than my monoblocks, so I sold them. Can’t go wrong either way.

Randy