Other Gear > Speakers
OB-H frame-SLOB
rockdoc:
--- Quote from: opa1 on December 08, 2022, 07:35:33 AM ---
I've looked at MJK's h-frame article. Seems simple enough. 16" square baffle mounted in the middle. 7.5 deep front and back.
--- End quote ---
where can I find this? I'm about to hook up my new F-15 Lii big barrel OB speakers I just built, and have no idea what to expect......
Steve T
2wo:
I have a pair of Betsy's on flat baffles. The plan is to combine them with a pair of the Hawthorne 15 inch woofers I forget what they're called driven by a Crown XLS. This is a couple of projects up the line though...John
opa1:
--- Quote from: rockdoc on December 08, 2022, 03:16:51 PM ---where can I find this? I'm about to hook up my new F-15 Lii big barrel OB speakers I just built, and have no idea what to expect......
Steve T
--- End quote ---
Not sure if this is what your asking but, here is the MJK U , H set up.
http://www.quarter-wave.com/OBs/U_and_H_Frames.pdf
Karl5150:
GRS 15PF-8 15" from Parts Express. Claimed Fs 29Hz & Qts 1.39.
Karl
Larpy:
I don't have the space for them in my room, but Martin King's OB design using the Eminence Alpha 15A as a sub (http://www.quarter-wave.com/Project09/Project09.html) has always struck me as a good way to go. The baffles in OB design really need to be big (at least 2' by 2', and bigger is better) to get good bass. The smaller baffles with wings such as the one Opa1 copied from GR are, IME, just too small.
Better, I think, to put your Betsy drivers along with sub/woofers in a single larger panel (per Martin King's design above) than to build an H-frame to put under a small baffle with wings. It will certainly be easier: building an H-frame takes a fair amount of time and skill.
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