Driver Combos

General
101

I just saved a picture of that first one for a future design, I love the tapered box + pod style! The colors are killer too.

102

The project above with the CF woofers and big Heil will now be using the new Epique mid.

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103

I’ve got a couple 15" PA driver options in my stash. Over the years I kept an eye out for a big horn with lots of “personality” to pair with. I found some 10"x18" biradials. I tried out some cheap d250-x clones (2"vc phenolic midrange CD). Standard screw on style. I’ve not had much luck with them in the past but I suspect poor horn pairing had something to do with it.

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Measurement done with driver set on the carpet, horn pointing upwards. Mic only about 12"-16" away pointing down. So distortion isn’t quite “real”, but still shows potential. Initially the response didn’t seem great. But, looking at the impedance graph, a parallel resistor could tame it a tad bit and a notch to squash the ~2.2khz peak the rest of the way.. might make it tolerable enough to be fun within ~400-4khz.

Only thing realy holding me back is personal issues with having large format speakers in a small home. But I think I’ll pull the trigger someday.

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104

Debating if this would be worth while effort. Likely in a chunky 1.5ft^3 standmount, imagine only 82-83db sensitivity but that not matter much for myself. Actually have a qaud of these SS8 revelator’s, but can’t bring self to make big 3 cuft tower, i tend to like bass bin + 5” 2 way for my 2 channel space. Someday settle on something large for fam room but been happy with my chunkers (satori9.5+sb12cac+wavecor “coax” ceram/silk tweet) in there.

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105

Testing the polling function. Drivers are GRS RT1.R-8 Neo Ribbon Tweeter, Dayton RS52FN-8 2" fabric dome midrange, and Dayton LW150-4 6" low profile woofers.

  • A
  • B
  • C
  • D
  • E
0 voters

A
A1938×3000 394 KB

B
B2196×3000 389 KB

C
C2109×3000 420 KB

D
D2400×3000 439 KB

E
E3000×2655 418 KB

106

I know it’s just a test, but the xover on the mid to woofer should be low enough to be fine with the woofers in E placement.

107

Probably have to go 3.5 way with most of the non-E configs. Crossover from mid to woof would probably be about 700Hz for the two inner woofers. Toss an extra inductor on the outer woofs.

Also thinking about putting one woofer on each side, one on the back, and one on the front just below the MTM. Wonder how that would work out?

108

Thanks for the votes. Looks like A and C are the most popular.

I plan to spin measure the drivers individually on test baffles and then use VCAD to model all the above combos, plus side and back woofer mounting combos not listed. I didn’t put side or back woofer mounts in the poll because I couldn’t take a quick pic of that combo for posting.

Tentative plan:

  • Measure tweeter 0-180H on front test baffle.
  • Measure tweeter 0-180V on front test baffle.
  • Measure one mid 0-180H on front test baffle (mirror the verticals).
  • Measure one woof 0-180H on front test baffle (mirror verticals).
  • Measure one woof 0-180H on side test baffle (mirror verticals).
  • Use VCAD’s Y value to move drivers up and down on baffle as needed.
  • Rotate VCAD’s R value to 90 degrees for woofer side panel mounts.
  • Rotate VCAD’s R value to 180 degrees for woofer back panel mounts.
  • Use Z value equal to cabinet depth for woofer back panel mounts.
  • Use Z value equal to 1/2 cabinet depth for woofer side panel mounts.
  • Use X value equal to 1/2 cabinet width for woofer side panel mounts.
  • The cabinet will be about 8" W x 48" H x 12" D (Internal vol 2 cu. ft.).
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