rvsixer
New Member
Good thought, but isn't pro stuff usually BIG? Recall I have a small listening/home theater/computer/hobby room, and was thinking 12" wide econowaves.
Zilch's AK Design Collaborative - Econowave Speaker
- Thread starter Zilch
- Start date
rvsixer
New Member
Such an enjoyable position
. RV-6.
Bauhausler
Rational Subjectivist
Closets? My speaker heap surrounds the dining room table!
rage
Well-Known Member
I can't even see the dining room table anymore.
Zilch I'd love to hear what you have to say on the Dayton DC-250, if I read your post right and you'll be measuring them soon with the QSC/DE250.
I just put a zobel on my DC-250s and am gettign ready to haul them to a friend to remeasure.
Zilch I'd love to hear what you have to say on the Dayton DC-250, if I read your post right and you'll be measuring them soon with the QSC/DE250.
I just put a zobel on my DC-250s and am gettign ready to haul them to a friend to remeasure.
Yes, yet today, maybe, though I'm having some difficulty keeping promises here of late....
This sim of another project from the Zaph website illustrates what I believe we may have going on:
I am working with some suggestions from NHT's Jack Hidley and "The one who knows." I have been able to move the forward axis down a bit by making the eWave highpass third-order per Wayne's design, and am next working on the lowpass. The Rane tech note suggests that a classic symmetrical third-order Butterworth's -15° downward tilt may be useful, Fig. 1a:
"Cancellation Axis" = forward null, for those following what's going on with these design adjustments; the view is from the side, showing the vertical pattern.... :thmbsp:
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skywave-rider
Slumming in Akihabara
I'm using Wayne's x-o. Currently trying to make space to do a halfway decent job in the verticals for kicks and to pretend I'm contributing.
That's real interesting about the 3rd order Butterworth's downward tilt. You must be thinking that would tilt-up to on-axis because of the QSC depth. I like your style.
Bauhausler
Rational Subjectivist
Rough math says 15 degrees at 1600 hz is only 1/3", meaning tha tdisplacing the acoustic center of the upper driver back about 8mm will tilt figure 1a back to horizontal.
Bauhausler
Rational Subjectivist
Help me, now, tan 15° = 0.2679 = opp/adj, with adj being the 10.5" C/C distance, so opp = 2.8135", no? Requiring 120° of phase shift?
(blink)
(blink)
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(blink)
......
Yah, different kinda degrees....
I'm not suggesting we need to be dead-on normal to the baffle, but we appear to be shootin' the sky presently, pending your measurements....
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ROSSO
Active Member
Your trig checks. Not that I pretend to understand the rest of the process...Help me, now, tan 15° = 0.2679 = opp/adj, with adj being the 10.5" C/C distance, so opp = 2.8135", no? Requiring 120° of phase shift @ 1.6 kHz?
Back to listening...
skywave-rider
Slumming in Akihabara
Oh Atlanta!
O.K., who's got my Occam's Razor?
Response and min phase looks good.
Judging from ZilchNutZ on components tacked-on, you're still third order on both filters?
(If you find those extra components superfluous, send 'em to this charity.)
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Yes. I'm still at 1.7 kHz using Jack's filter component values, and want to try to move that down more, and get rid of the Zobel tucked in the back there. Still more tricks in the bag.
I'm certainly finding that yanking the forward lobe around isn't as trivially easy as supposed, assuming that's actually what I'm measuring here....
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Spectrum77
Super Member
Technics SB-5000a
djnagle- SB-4500 E/W
Blast from the past- whatever became of this project, sir? Which X/O configuration did you go with regarding 'the bump in the vocals'?
Spied a pair of SB-5000a (with fried tweets) at a local 'recycle shop'...
Feel some WAVIN' comin' on!!
djnagle- SB-4500 E/W
(From page 60)
Blast from the past- whatever became of this project, sir? Which X/O configuration did you go with regarding 'the bump in the vocals'?
Spied a pair of SB-5000a (with fried tweets) at a local 'recycle shop'...
Feel some WAVIN' comin' on!!
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Hi Spec. right after I found those, I found a pair of ESS AMT 1c. I bought them just for the big Heil tweeters for my main system, then looked at the bass cabs and thought, what the hell and made eWaves out of them. At that point I put the 4500 in a closet and just now remembered I had them. I have a TT and three amps in the cue before I get to the 4500 eWave project. I HAVE to get some of these half done project off the bench. The 5000 have MUCH better woofers and think they would make great eWaves. both of them have great bass that crosses much higher than the eWave project calls for. Good luck.