(caution, longish post with lotsa pics in it..)
Looks like that's going to work.
I've had very good results simming in PCD this year, so I'm a believer.... :thmbsp:
OK, once I got past the fixed circuit layout restriction - which isn't that restrictive as most passive crossovers do follow the same layouts, now I'm impressed.
..so following on from my previous post where I had a prototypical crossover worked from the manufacturers response curve.. of course once I got the eminence Delta 12LFAs and measured them in the real world, the shiny smooth factory curve that was so easy to shoehorn into a flat line turned out to be a lot more challenging, so I had to revisit the crossover, and I was quite stuck for a while using Speaker Workshop to slowly work through different layouts.
SPLtrace data against my measured with cabinet data for Delta 12LFA, scaled so they overlay:
Part of this was the time and mouseclicks taken to change a component value, recalculate, view response graph on SW, while the same operation in PCW is instantaneous.
new Delta 12LFA and the current Pioneer woofer:
I also read through some of the existing Econowave designs, loaded in the FRD and ZMA files for the Econowave SR Compact (as my current proposed crossover shows!), this was very informative checking out against another dataset, for instance my measured d220ti + Pyle WG curve pretty much exactly overlays the Econowave SR Compact curve, which is encouraging that my measurements are OK.
I also switched to Holmimpulse for measurements, to use its gating function, and made a set of measurements outside. My back yard is not huge, but with the speaker on its back there is no "back wall", and hopfully the irregular shape of the vegetation diffused some of the reflections.
After trying all sorts of layouts with the resultant data in both Speaker Workshop and PCW I'm currently tending towards a variation of the Ewave SR compact crossover but using a Zobel impedance correction on the woofer.
response in PCW:
circuit in SW:
response in SW (some smoothing applied):
I got the Eminence Delta 12LFA from local (Melbourne) dealer
Essential Audio. The hard bit was having to enlarge the hole by 2mm around to fit, which was done by running around the inside of the hole with a jigsaw twice:
..luckily the screw holes lined up from the previous driver exactly.
.. now the next step is to adjust the above circuit to use values available from combinations of Jantzen components or similar, and price up a list.