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Get familiar with the reaction system: Introducing the Reaction System
Open baffle ideas?
Just bought 4- 12 inch MCM woofers 55-2973.
https://www.newark.com/mcm-audio-select/55-2973/12-woofer-with-poly-conerubber/dp/80R7012?CMP=e-email-sys-orderconfirmed-NA-Product
Now the fun begins. What would you do with them?
Ideas I'm thinking about:
Slot loaded open baffle.
MTM open baffle like a pure audio project.
TMWW with a mid that could cross high enough to a plainer tweeter.
Baffleless?
I would love to hear your ideas and would really appreciate some references on how to design open baffle speakers.
I plan on using a DSP 2*4HD as the heart of the system.
Thanks for the help and inspiration.
Comments
My previous speakers were a bi-amped open back, usings Beyma 12s, crossed via minDSP to mid/tw section that I made to change out / play around with (i.e. AudioNirvana full range, Celestion coaxials with passive Xovers, etc).
I took them to Iowa 2018, so a couple of pics of completed speakers ~ pg 4 under Event Archive. And I’ve attached a couple of the build as well. Also posted in forum discussions 'Open Back spkr project' and 'New Open Back top-end project'
Have fun.
I say face to face slot ripole if you're going open baffle.
The thought of stacking the 2 12's to make a super slender ripole could be cool as well.
Tajanes, is the woofer baffle tilted inward for any reason? Looks like it kept your speaker from getting too deep. I like it.
Wouldn't he need 4 more?
InDIYana Event Website
If you're going to cross an OB mid to a planar tweeter it's gonna need to be fairly small diameter and on as narrow a baffle as possible to keep the first dipole null high enough.
A super slender ripole sounds like a good plan.
Ripole. Any OB will need DSP and big power. Didn't check your specs, but lots of xmax is good.
Slot loaded OB seems interesting and not too difficult to build. I've never tried one so I have no idea how it might sound. It seems it would be possible to end up sounding like someone talking thru cupped hands... I would suggest a quick and dirty prototype with a couple of board and clamps, or possible even a sheet of cardboard if you go that route.
An MTM or TMM in a basic 16 to 18" wide plywood sheet is fairly well tried and proven.
I generally start with a prototype OB and listen for a while before I commit valuable wood to the project. Hopefully you have some large inductors, like 5 to 10 microfarad, they are generally needed for an OB in my experience.
Thinking behind tilting V woofer set-up: ctr to ctr distance a bit closer (output combining), overall compact height, and does provide a little offset / cancellation of woofer vibration.
Best software/resources for open baffle design?
Your ears
Slot and ripole have chamber resonances to deal with so a 3-way is mandatory. If you are doing a flat baffle then ABC dipole. Slot, W, N, and ripole then use a combination of Horn Response and Edge.
I have the 4 12's in the basement playing metal to break them in.
Still thinking about the tweeter and mid. I will probably pick by efficiency. I have lots of 3-4inch full range speakers then my selection jumps to 6 1/2. I worry the smaller drivers won't be efficient and the larger drivers won't get high enough to match the tweeter.
I kinda like the pure audio project in that it can swap components easily. I might go that route to prevent analysis paralysis.
If you post what you want to do we can run a few sims.