All Eminence OB

[Yunick]

Well this will be my first speaker project that I begin without full documentation... I have preavius build the DIY2000 speaker, Cyburgs needle, Mumma Mosen clon... But the more I read about open baffle's the more I feel the urge to try them..

But as a student I'am not loaded with cash so it has to be a somewhat limited budget.. So with som help from Zen Mod the project stood clear..


The plans are to use Eminence spks in a open baffle configuration..

Beta-15 up to 150Hz
Alpha-6 from 250-300Hz
APT-80 from 10000-15000Hz.

XO will be simple serie filter (6db/octav).

The drivers can be had for $350 in Sweden..

Baffle size is 450x1350mm. The sides tapers to the top with a base of 350mm.


There are also plans on giving the Alpha-6 a new phase plug and EnABl treatment.. This is very important to bring out the best from Alpha driver..



A thread i useless without pic's, right Here they are:

http://www.diyaudio.com/forums/showt...00#post1278400


These will be driven by my babbelfish-j/Aleph P1.7/dddac.de combo.

[adason]

let me be the first to congratulate, Yunick!

[Yunick]

Originally posted by adason
let me be the first to congratulate, Yunick!

Thank you, adason

[OzMikeH]

If you have the equipment it would be most interesting if you can measure the differences from EnABl-ing the baffle edges.

[Zen Mod]

ugly!



hehe I bet that sound is dreky .........



worth to mention JamesD (if I rem. correctly ) and his ugly OBs......

also Mr. Lampizator ...... (google for it- man is nutz ! )

Yunick's xovers are simple....

bass choked at 6db/oct - 150Hz

main spk - Alpha 6 just capped at ~300 ,also 6db/oct

Apt80 - just capped via 1,5uF ~13K......what else than 6db/oct ; yes - L-pad is still missing (to bring it down some 8-9 db) also felt on back of Alpha 6 etc , just because Yunick have some obligations to soften WAF slightly

[Zen Mod]

Originally posted by OzMikeH
If you have the equipment it would be most interesting if you can measure the differences from EnABl-ing the baffle edges.

me thinks that Yunick is well equipped with ........ ears

[Yunick]

Originally posted by OzMikeH
If you have the equipment it would be most interesting if you can measure the differences from EnABl-ing the baffle edges.

Unfortunatly I don't... So like Zen Mod say.. Only my ears will be the judge..

Originally posted by Zen Mod
ugly!



hehe I bet that sound is dreky .........

Hehe.. Thanks alot

Impressions will come..

[hakunin]

They are wonderful!

[adason]

Yunick,

first of all, they are not as big as you think. Many 3-way monkey coffin floorstanders are the same size. I have seen and even had much bigger open baffle speakers. They might not actualy be low waf, as long as you put some grill over the front (or get rid of wife).
You might experience less deep bass, for bass cancelation and not enought bass surface area, but on the other hand bass should be clean.
If that happens and you run out of cone excursion in deep bass, just close the woofer behing in closed box, keep the midrange open baffle. Thats a best thing which can happen to the midrange. I would even use second tweeter to radiate to the back. That depends on personal taste.
Good luck.

ed

[adason]

When it comes to you Zen Mod, all your latest post were lame, you say "ugly!" to pretty much anything and nothing is good for you. What happened to you guy?