Speaker ideas for 3127 drivers

[GM]

The 82227 is presumably the best for ~continuous high power apps based on destruction testing; but for short term, AFAIK the pioneer's Vas/1.44 tuned to 1.56x Fs is the max, i.e. Xmax/Xlim sets low/high distortion max power, which depending on driver design can be ~1.4142 - 2x 250 W continuous, 500 W program that make a recording sound/feel more realistic, though in a sim and not knowing Xlim, best to assume just ~350/700 W max and your call to test higher.

So ideally measure T/S specs for all of them, find the mean specs to design with. For venting a single round hole is most efficient, but at this level the pioneers know best, so dual 7" dia. based on published specs, increased power up to ~1 kW with length TBD.

[Elitopus1]

I need to get Dats or something so I can test Ts specs. My quad of 3127 have original cones is all I know. So maybe specs are close to published specs? It would be nice to verify.

[GM]

Indeed! As power increases, any mismatch can become a real problem in that the one drawing the most current will dominate and next thing you know the other one is little more than a passive radiator till the current 'hog' rolls over from heat rise, VC burns up.

For this reason prosound drivers tend to be well matched, but as time wore on Altec was being increasingly gutted, so QA suffered, hence the caution to measure, match, use the mean for design. The last two custom ordered 515B in '87 were so far off from spec and each other I had to tune the cabs completely differently, but being just a stereo pair they sounded identical in room, but efficiency was off enough that it took more power than the little flea power amp had at low distortion, so the owner wasn't a 'happy camper' overall.

After that, I only ordered the last pair of the ultralite diaphragms as spares when the distributor was having a 'fire sale'/switching to B0$3 prosound in '96?.

Anyway, there's lots of cheaper ways to measure drivers than DATS, which has been known to have problems.