New speaker versions - Nov 2017

Update November 2017: 
I'm pretty happy with my current speakers and I have no plans to build anything new but I still enjoy sketching up ideas and sharing them here.   

Below is yet another version (#7) of a design I call the Eros Clone because it's inspired by Roger Sanders' Eros speaker.  It has a segmented wire panel mated to my favorite 10" woofer, in a compact transmission line.  The compact cab would give a higher F3 than an optimal-volume TL, yet still acceptable, and the curved surfaces behind the woofer prevent cab resonances bouncing back to the cone-- giving very clean bass.  The furniture quality woodwork and oak lattice wire panels are a nice combination.  

The woofer box is 3/4 A-A plywood with a kerf-bent curved back, internal baffles are 1/2" MDF and the frame is red oak.  All pieces are shown in a dimensioned 2D, 3-view orthgraphic CAD drawing that's available on request. 
  

Unlike earlier versions, the panel/frame assembly can be detached from the woofer box, which makes it easier to transport.  And it's easier to build, using simple lap joints and rabbits cut on a table saw.  The rabbits on the curved side panels can be cut on a router table with fence or with a plunge router mounted on a shop-made compass jig.  

Eros Clone version 7:



















Below is a modified H-baffle design which uses a 12 x 48 segmented wire panel mated to a Peerless SLS 12" woofer.  Due to dipole roll off, a single 12" woofer would give clean bass output to moderate volume but would likely need some help from outboard subs to play really low with authority.  That said; it would really rock if the woofer were unloaded below 60Hz-- crossing over to a pair of subs.  The advantages are clean box-less sound, ease of build, and matching dipole radiation pattern between the panel and woofer.   I really love the looks of this speaker-- and I would really love to hear it!

SLS 12 H-baffle ESL:


'

















Below is a newer version of the beam-splitter transmission-line ESL.  It's very similar to the original version shown in all the photos, except  simpler, slimmer, and easier to build.  I haven't built this newer version but if I had it go do again, this would be my speaker except with a wire panel rather than the perf metal panel shown.   

The new version omits the 5mm plywood sheathing and edge trim from the woofer box, and is now either 3/4 painted MDF or stained 3/4 A-A oak plywood.  The frame sides and front woofer baffle are now 3/4 A-A oak plywood and the front frame rails remain solid red oak.  The speaker's width is now reduced to 14 inches, and the beam splitter now forms a slightly sharper blade at 50 degrees incident to panel (was 45 deg) to deflect the rearward sound 5 degrees rearward of perpendicular.      


I have a complete, dimensioned 2D DeltaCad drawing with orthographic views of all details, including magnetically attached speaker grills.  

And I now also have a 3D solid model in Google Sketchup.  

I will email drawing files to anyone upon request.  
My email address: 

jazzman1953@gmail.com


Click to enlarge image: