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Open Baffle Epiphany!

baco99 said:
I would use a crossover. You can design something very simple online and put it together with $15 in parts.
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Thanks. I wouldn't have a clue about how to go about doing that but I do have a soldering gun -- can you point me to a web page somewhere that shows a schematic diagram? In the meantime, I may just try it using the woofer full range and see how it sounds.
 
johnebravo said:
Thanks. I wouldn't have a clue about how to go about doing that but I do have a soldering gun -- can you point me to a web page somewhere that shows a schematic diagram? In the meantime, I may just try it using the woofer full range and see how it sounds.
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www.diyaudioandvideo.com

If you know your intended x-over freq. it will give you a diagram with component values. There is also basic tutorials which are very helpful.
 
My journey has taken me from conventional speakers with passive crossovers to single driver full range speakers without crossovers.

One of the selling points of OB's was that I could still use full range drivers without passive crossovers.
 
no baffles!?

hey PG,

i picked up some H-frames with alpha 15As in them and am looking to build a smaller baffle for a FR driver on the top. i started thinking about no baffles, mainly because i think i could build that with my terrible carpentry skills, and ran across this thread:

http://forums.audioreview.com/speakers/no-baffle-over-open-baffle-full-rangers-37582.html

how did you like these? would you recommend someone else trying it? compare to OB, etc...

thanks!
 
johnebravo said:
Thanks. I wouldn't have a clue about how to go about doing that but I do have a soldering gun -- can you point me to a web page somewhere that shows a schematic diagram? In the meantime, I may just try it using the woofer full range and see how it sounds.
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There are online tools that will help you. Just do a Google search for 2-way crossover design or something like that.

Or if you find a cheap pair of bookshelf speakers at GW, just strip out the crossovers and use those. Better than nothing at all.
 
Anyone recognize these speakers. Believe they are made by someone in the Seattle area. Rated at 97-98db efficiency. The top driver in the first photo is a coax.

Also, Dennis Had has some new OB speakers in the last pic, but is thus far not talking about them or offering on eBay as he is doing with his line of preamps and SETs.
 

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Yes...those are the Hawthorne OB drivers as made by Woodsage.

Hawthorne works with Eminence for drivers. They are a run specifically for Hawthorne. The coax full range are called Silver Iris. The woofers for augmenting the low end are called Auggies. Both are available in both 15" and 10" models.

Go by the Hawthorne forum for more.

EV3
 
Yep, Hawthorne Audio Silver Iris Duets in the first pic and Hawthorne Audio Rainiers in the 2nd and 3rd pic. The Duets have a coaxial driver with a bass augmentation driver (Augie). The Rainiers have a bass driver, a mid bass, and a wide range AMT style driver for the upper mids and highs. They look and sound pretty excellent.
 
Well, the new OB/TPA3116 setup is up and running. Pics tomorrow. I am already digging the sound, even with things not yet optimized. With the speakers placed in front of my primary set (big Technics), I was able to dial in a fairly flat response. Now that I moved the Technics, and put the OB's in their place (closer to the corners), I'm hearing a pronounced midbass hump. Well, the drivers need to reacclimate to being in use as well. So I'll definitely twiddle around with it lots more tomorrow.

Oh, and I also doped the woofer cones (diluted wood glue). If nothing else, it evened out their color. :D
 
So this morning I have a migraine. :sigh: But that hasn't stopped me from playing with the new setup, although obviously it hasn't been much fun. It does seem that the woofers have changed a lot in character, as I let the system play (at a low level) all night. Things seem to be smoothing out, but time will really tell.
 
rogerfederer said:
hey PG,

i picked up some H-frames with alpha 15As in them and am looking to build a smaller baffle for a FR driver on the top. i started thinking about no baffles, mainly because i think i could build that with my terrible carpentry skills, and ran across this thread:

http://forums.audioreview.com/speakers/no-baffle-over-open-baffle-full-rangers-37582.html

how did you like these? would you recommend someone else trying it? compare to OB, etc...

thanks!
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No baffles on top of H-frames might surprise you. I only tried some old Sansui woofers in flat baffles with assorted FR's on top and liked what I heard. I used fishing line to suspend the drivers from "i" hooks. It can get a little tricky getting the right geometry so there's no sag with heavy magnet drivers.

I've seen several no baffle builds that look like lollipops, some using Lowthers.
 
Ok, that is enuf to get me started. Thinking I'll try my visaton b200s 1st for my fr drivers. Will need to use stronger wire than fishing line. Maybe the stuff you use to hang paintings.

I'm looking for some old window sashes for my frame.
 
Here are some baffle-less Lowthers.

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Here are the speakers (in their current unfinished state), and the hydra-esque electronics driving them:



 
Listening to some Brian Bromberg right now, and I must say that the mid-bass hump I heard last night is completely gone. The bass (along with everything else) is just as smooth and well-mannered as you could ask for. :thmbsp:
 
jhoyt said:
Listening to some Brian Bromberg right now, and I must say that the mid-bass hump I heard last night is completely gone. The bass (along with everything else) is just as smooth and well-mannered as you could ask for. :thmbsp:
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Very nice system
 
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