604's in Open Baffle.

**Cal Weldon** · January 25th, 2012, 10:43 AM

No pics of the open baffle but if I read you correctly you might want to try something like the "holey backs" seen here. That really reduces the boxy sound and still preserves a lot of the bass.

**Skip Pack** · January 25th, 2012, 12:56 PM

I have 605Bs in 21" square baffles. Sure enough, they don't go much below 60hz or so.
But above that they are marvelous. I'm building H baffles (open backed boxes really) for
18" woofers that will be driven with equalization to fill that in. Inspired by JB's OBs
that Pano used at LASF in 2010 (i heard them in 2008), I expect to end up in the same
neighborhood. I strongly recommend a quick and dirty test, at least. I doubt you will
be disappointed.

Skip Pack

**Panomaniac** · January 26th, 2012, 01:32 AM

48" tall puts your driver at a good hight. It also avoids having all baffle sides the same dimension, however much that matters.

How about a 1/4 sheet of ply? 24x48" with asymmetrical wings. Smaller footprint than your 36" baffle.

**tonino** · January 26th, 2012, 06:30 AM

Hi All,
Yes the OB really reduces the boxy sound and still preserves a lot of the bass.My 604D in OB are capable to reproduce good bass till 120 hz. Below two khorn reproduce from 40 to 120 hz. You can see at :
www.estroarmonico.com/Altec_2.JPG
www.estroarmonico.com/Altec_3.JPG
www.estroarmonico.com/Altec_4.3.JPG

-

**tonino** · January 26th, 2012, 06:31 AM

sorry:
www.estroarmonico.com/Altec_4.JPG

.

**tonino** · January 26th, 2012, 06:38 AM

sorry again:
www.estroarmonico.com/altec_604d_2.JPG
www.estroarmonico.com/altec_604d_3.JPG
www.estroarmonico.com/altec_604d_4.JPG

**amandarae** · January 26th, 2012, 08:18 PM

Originally Posted by tonino

sorry again:
www.estroarmonico.com/altec_604d_2.JPG
www.estroarmonico.com/altec_604d_3.JPG
www.estroarmonico.com/altec_604d_4.JPG

How's that Brilliant Pebbles working out?

Abe

Abe

**tonino** · January 27th, 2012, 06:28 AM

Brilliant Pebbles work thery good , they cancell many of the metal drive resonances. Here a pic of the Iconic network that I use in my system :
www.estroarmonico.com/iconic_MG_5343.JPG

**Panomaniac** · January 26th, 2012, 11:28 AM

Nice looking setup, Tonino. Thanks for showing us.

(just a note: You may want to resize and compress your photos for the web. They're huge! 1.7 meg isn't best for web use. They don't need to be over 75KB)