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Sometimes I wonder if developing another center channel design is a bit like doing another 6-1/2" two way- as I think Dennis Murphy said once, another 6-1/2' two way is not going to be a ground breaking concept...
But it can be made interesting... (but that's a different day and a different project... )
And in the case of a CC, well, we have some precedent for slightly off the beaten path CC's with the NeoD CC design.
http:s//www.htguide.com/forum/showthread.php?27218-Modula-NeoD-CC-Introduction-and-Build-Thread&highlight=NeoD
That design's trick was a pretty good (at the time; times change) dome midrange, a compact clean tweeter, and relatively low cost copies of the large voice coil design woofers done by Dynaudio and Morel, all stitched together with a crossover that had a passing fair resemblance to a Duelund, but modified some transfer characteristics to make it feasible to have a rearward time offset on the woofer, and to simply slightly the target function.
And it did a pretty fair job of getting the job done-
I actually built a pair and evaluated them as a stereo speaker as well, though the driver layout was not optimized for that, in some senses. That pair was donated to the partial quadriplegic son (diving accident) of my ex wife's oldest sister. His mom, in fact, is the recipient for the original pair of Module XT HE. Sadly, she died in a rafting accident on the Canadian North Slope on a package adventure several years ago, and her son was rather taken advantage of by his sister- no one in the family is speaking to her these days.
But I digress...
So, the intent is both a CC design and possibly a 3.5 way TMWW design in the future with the same driver set. Still compact, but more capable... this is 2020, after all, not 2009.
Recent driver evaluations have pointed things in some interesting directions, so the plan of record now is
Evil Twin has saved me some work with driver evaluations, so things are moving along at a reasonable rate...
Of course, before committing to hardware, it's a good idea to have a POC plan (Proof Of Concept) and that has been completed for the initial network design with a modified voicing concept:
no obvious problems here, so obviously I've overlooked something, but I'm sure I'll discover it during the assembly and development!
The plan for an initial test cabinet is embarrassingly ad hoc- an unhoy marriage of two Denovo 0.56 cu ft MDF cabinets, with added top and bottom structural panels, and a simple LBL front panel.
This is just a development mule, after all... Steve will come up with something attractive for us to admire if I can just make this work...
But it can be made interesting... (but that's a different day and a different project... )
And in the case of a CC, well, we have some precedent for slightly off the beaten path CC's with the NeoD CC design.
http:s//www.htguide.com/forum/showthread.php?27218-Modula-NeoD-CC-Introduction-and-Build-Thread&highlight=NeoD
That design's trick was a pretty good (at the time; times change) dome midrange, a compact clean tweeter, and relatively low cost copies of the large voice coil design woofers done by Dynaudio and Morel, all stitched together with a crossover that had a passing fair resemblance to a Duelund, but modified some transfer characteristics to make it feasible to have a rearward time offset on the woofer, and to simply slightly the target function.
And it did a pretty fair job of getting the job done-
I actually built a pair and evaluated them as a stereo speaker as well, though the driver layout was not optimized for that, in some senses. That pair was donated to the partial quadriplegic son (diving accident) of my ex wife's oldest sister. His mom, in fact, is the recipient for the original pair of Module XT HE. Sadly, she died in a rafting accident on the Canadian North Slope on a package adventure several years ago, and her son was rather taken advantage of by his sister- no one in the family is speaking to her these days.
But I digress...
So, the intent is both a CC design and possibly a 3.5 way TMWW design in the future with the same driver set. Still compact, but more capable... this is 2020, after all, not 2009.
Recent driver evaluations have pointed things in some interesting directions, so the plan of record now is
- Anarchy 558's for the woofers, due to high Xmax and reasonably linear motor, and excellent cone behavior up to 3kHz
- Morel EM1308 dome midrange - no pesky surround resonances or other problem that mar the current Dayton RS52AN
- SB Acoustics SB26CDC-C0004 tweeter, which is likely one of the finest 100mm frame tweeters you can get for under $100.
- A full on Duelund crossover... only one phase turnover, and drivers pretty much in phase for all frequencies (difficult to impossible apart from the theoretical transfer function) down to -20dB (achievable with work).
Evil Twin has saved me some work with driver evaluations, so things are moving along at a reasonable rate...
Of course, before committing to hardware, it's a good idea to have a POC plan (Proof Of Concept) and that has been completed for the initial network design with a modified voicing concept:
no obvious problems here, so obviously I've overlooked something, but I'm sure I'll discover it during the assembly and development!
The plan for an initial test cabinet is embarrassingly ad hoc- an unhoy marriage of two Denovo 0.56 cu ft MDF cabinets, with added top and bottom structural panels, and a simple LBL front panel.
This is just a development mule, after all... Steve will come up with something attractive for us to admire if I can just make this work...
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