[xecluded]

Here is my new OB using Boston Acoustics A-120 speakers.  I cut open the back, put in a 10" (B.A. use a passive woofer originally) for low end.  Using original crossovers from B.A with an addition of a 9mh choke wired it going from main 6.5" woofer of B.A to the 10". 

http://www.audiocircle.com/index.php?action=gallery;area=browse;album=1790&pos=0
http://www.audiocircle.com/index.php?action=gallery;area=browse;album=1790&pos=1
http://www.audiocircle.com/index.php?action=gallery;area=browse;album=1790&pos=2

Sorry I dont know how to link pictures here.

[kyrill]

hi

Daring..

So how does it sound?





http://www.audiocircle.com/gallery/albums/userpics/55856/open3.jpg
http://www.audiocircle.com/image.php?id=18743
http://www.audiocircle.com/image.php?id=18744
highlight every link above and then apply insert image 2nd icon on the lower row, under I

[xecluded]

Better than when they were in sealed enclosures. Much more open.. Thanks for inserting the pictures here and the html tips Kyrill.

[kyrill]

no hearable  resonance  ( standing waves) from the lower open box?

[xecluded]

resonance maybe there but i dont listen to music that loud hence can't really detect it.  drums sound lot better  this way.

[richidoo]

That is AWESOME!!!!! Winner of most creative (and most frugal) mod award!
Thanks for the big smile! 

[HiFiNutNut]

Impressive work.

I would stuff some stuffing materials along the back side of the panel as well as the in the box, as much as possible without touching the drivers or blocking the airways immediately behind the drivers.

Regards,
Bill

[nodiak]

Heroic!

[iON]

A cabriolet conversion done on a speaker?! What a genius move!

.. woofer looks interesting btw, it's not AlNiCo is it?

[xecluded]

thanks guys. woofer is vintage rca alnico.  jbl l100t maybe next victim 

[Bob in St. Louis]

Brilliant!! Well done, very creative. I LOVE it, that's a classic! 

[hurdy_gurdyman]

It's always great to see new life breathed into an old classic. Your's are much more creative than most. Well done!

Dave   aa

[Dmason]

Cabriolet Classic!!

Awards are in order for Most Thinkingest Mod!

Looks like it is good on gas, as well!

Objet leson, on sawing your way THROUGH the box to think outside of the box!

[-Richard-]

Nice work xecluded!!!!

When Alexander came upon the huge entanglement of the Gordian Knot he was told that the man who could untie it would rule the world.

Alexander took out his sword and cut the knot in two... and it seems you have done something similar.

Warmest Regards ~ Richard

[xecluded]

You are all much too kind -- thanks  . I will keep you update with the next similar project.  Thinking about vintage alnico foster fe103 + some 12" that would match the efficiency of the foster and can produce decent low end.

Looking at the existing layout, the 12" woofer is too far off the floor and probably is not a good idea for me to use these cabinets for OB.  What do you think.  (I just borrowed the picture off ebay - these speakers are not mine though mine are essential the same.)

[nodiak]

xecluded, imo what you did to the Boston's was a fun way to get in the game, but I agree with the woofer being too high on these next one's. At some point you may be better off selling those as is and building a dedicated baffle for other drivers, now that it's known you have a saw . Those 103A's are pretty nice and would work with Martins Alpha15 OB design, among other ideas.
Don

[xecluded]

That's what I am thinking about doing too Don.   I guess I would quit messing around with my new saw for a while...