The spec sheet for PL premium lists bond strength at 24 hours cure at 3.6 N/mm² (542 psi).
Typical polyester resin bond strength is in the 500 psi range, slightly less.
That said, fiberglass reinforced polyester resin machines (drills, shapes, sands) nicely, PL adhesive does not.
I would not rely on the bond strength of either for a speaker cabinet application without also using plenty of mechanical fasteners.
Typical polyester resin bond strength is in the 500 psi range, slightly less.
That said, fiberglass reinforced polyester resin machines (drills, shapes, sands) nicely, PL adhesive does not.
I would not rely on the bond strength of either for a speaker cabinet application without also using plenty of mechanical fasteners.
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Yeah, i guess.
But why would anyone do that?
If you use a CD that can't run as low and have to add smaller mids,
the cost tradeoff is the price of the dcx464 vs the sum of lower priced CD and however many mids you need. Probably not much of a $ difference.
The labor tradeoff for adding smaller mids is a huge negative imo.
Seems to me if someone is willing to pay up for this horn, which was specifically designed to take advantage of the dcx464's low end extension, it's likely they will spring for the dcx464 as well.
This is DIY audio, people labor for fun!
One might use small mid cone drivers rather than a co-axial driver like the dcx464 to achieve more clean output below 800 Hz from the ME464 horn than would be possible using the dcx464.
That said, I'm curious what diyuser2010 plans to use the ME464 horns for.
One might use small mid cone drivers rather than a co-axial driver like the dcx464 to achieve more clean output below 800 Hz from the ME464 horn than would be possible using the dcx464.
That said, I'm curious what diyuser2010 plans to use the ME464 horns for.
Yep for sure, no telling what we DIY nuts will undertake 😀
ditto the curiosity as to diyuser's plans for the ME464
ditto the curiosity as to diyuser's plans for the ME464
This might be an idea worth pursuing if size isn't a problem.
QX Series Archives - EAW: Eastern Acoustic Works
QX Series Archives - EAW: Eastern Acoustic Works
Yep, those look interesting.
I've toyed with the idea of trying that "prism" type build with 4 smaller mids, say 8"s, around an xt1464 or some similar horn.
The only comments I've heard about the QX series came from a prosound guy who said they are stellar if on the sweet spot. But they vary off-axis more than one would hope. (He's a guy who's comments on other stuff i'm experienced with, seem consistent with my takes.)
i think it kinda gets back to the question, how can a synergy be flattened or otherwise built (ala this prism for example) .
Must say, i'm getting more convinced in "one horn to rule them all" lol...
....as the way to get closest to point source, over any kind of decent listening/coverage area
Hi guys. Did this ever progress beyond the measurements? I’ve got the horn and Coax (464) and really just want to make a synergyhorn from this by adding a 10” or 12” driver to cover the 80-400hz bandwidth.
One question, the 1/4wv length spacing is 8” for 400hz. Does that mean the center of the LF driver needs to be 8” from the coax exit/mounting flange or is it the exit holes of the LF driver need to be within 8”? Center to Center will be challenging for a 10 and impossible
for a 12”
A 3D printed custom LF flange as you have indicated here would be necessary to implement this.
The other option is putting 10” drivers back at the horn flange and ducting or adding a throat if you will to channel the mid freq content around the horn and out through a mouth at the front of the horn.
Anyway thanks for reviving this discussion. Finding a good 3d designer or fabricator I think is the key to a 464 Syng horn.
One question, the 1/4wv length spacing is 8” for 400hz. Does that mean the center of the LF driver needs to be 8” from the coax exit/mounting flange or is it the exit holes of the LF driver need to be within 8”? Center to Center will be challenging for a 10 and impossible
for a 12”
A 3D printed custom LF flange as you have indicated here would be necessary to implement this.
The other option is putting 10” drivers back at the horn flange and ducting or adding a throat if you will to channel the mid freq content around the horn and out through a mouth at the front of the horn.
Anyway thanks for reviving this discussion. Finding a good 3d designer or fabricator I think is the key to a 464 Syng horn.
Hi Burnsze15,
I don't know what's actually technically correct, but i use center-of-port hole to throat for calculations. It's worked pretty accurately for me on a number of builds.
I've kinda given up on the idea of using the 464 for a synergy. I think the long throat-snout and the ribs up on the horn flares, are together just too much to overcome.
Being a wimp i guess...
Would love to see you or somebody pull it off !
I don't know what's actually technically correct, but i use center-of-port hole to throat for calculations. It's worked pretty accurately for me on a number of builds.
I've kinda given up on the idea of using the 464 for a synergy. I think the long throat-snout and the ribs up on the horn flares, are together just too much to overcome.
Being a wimp i guess...
Would love to see you or somebody pull it off !