I find that people always make up their own minds what the loudspeakers can look like, especially after hearing them. Why would you even bring up the subject unless you're trying to negate the goal of "sounding better" in favor of an arbitrary prejudged result.
Physics is physics. Psychophysics is psychophysics. Fashion trends come and go.
Chris
Physics is physics. Psychophysics is psychophysics. Fashion trends come and go.
Chris
So i can clarify.....i didn't have commercial/fixed install systems in mind when creating this thread.
Just to annoy you i suppose.....really?
Nothing is truly arbitrary and expectation bias is one the most powerful aspects of human nature.......choose to ignore it at your own peril.
Hi Guys.
So, a follow member (Bumbledad) gifted me a new pair of Heil AMT drivers. I decided to build a pair of speakers with parts I have in the shop.
I have a pair of JBL 6x6 horns and a pair of Dayton Audio DT250P-8 Compression Driver.
I also have a pair of DynaLab V22-DR-0003 8" Paper Cone Woofer 4 Ohm that have an f3 of 25hz in a 3 cu ft box.
The CD is solid down to 600hz out to 10khz.
so I want to cross the woofer at 600hz to the CD then cross the CD at 5khz or so to the Heils. I have an active three-way crossover and a handful of amps.
Below is a link to the woofers and a picture of what I’m thinking for the cabs but with the horn above the woofer and the Heils on top like the picture.
DynaLab V22-DR-0003 8" Paper Cone Woofer 4 Ohm
Last edited: 2023-07-03 3:11 pm
So, a follow member (Bumbledad) gifted me a new pair of Heil AMT drivers. I decided to build a pair of speakers with parts I have in the shop.
I have a pair of JBL 6x6 horns and a pair of Dayton Audio DT250P-8 Compression Driver.
I also have a pair of DynaLab V22-DR-0003 8" Paper Cone Woofer 4 Ohm that have an f3 of 25hz in a 3 cu ft box.
The CD is solid down to 600hz out to 10khz.
so I want to cross the woofer at 600hz to the CD then cross the CD at 5khz or so to the Heils. I have an active three-way crossover and a handful of amps.
Below is a link to the woofers and a picture of what I’m thinking for the cabs but with the horn above the woofer and the Heils on top like the picture.
DynaLab V22-DR-0003 8" Paper Cone Woofer 4 Ohm
Last edited: 2023-07-03 3:11 pm
Sounds great but you won't get that horn to load the 250 down to 600hz......you'll need something deeper for sure.
This will get you there and the 45x45 pattern would be nice for an untreated or small space
https://www.parts-express.com/PRV-A...45-Waveguide-1-3-8-18-TPI-294-3018?quantity=1
This will get you there and the 45x45 pattern would be nice for an untreated or small space
https://www.parts-express.com/PRV-A...45-Waveguide-1-3-8-18-TPI-294-3018?quantity=1
Large woofers won't make it to cross with Ribbons......you need a small 4-5.25 inch driver for that....no D'Appolito either as the spacing center to center will introduce some nasty lobing.
The Visiton b200 is a great driver for full range.....i'd pair that with a 1" dome tweeter than can cross low around 1.8khz and a pair of 8" woofers underneath.....that would be a nice narrow three way with wide horizontal out to around 10khz
Yep, I’ll build and measure and adjust the MiniDSP to find the best cover points. I already have all these parts and will see if I can make all work.
I also have 2 KLH subwoofers that I’ve thought about gutting and putting the drivers and plate amps in the bottom of the cabs. Side firing of course.
So you're well read on the subject of expectation bias, are you? Perhaps you've absorbed the relevant articles in Judgment Under Uncertainty: Heuristics and Biases (1981, ed. Kahneman, Slovic & Tversky)...or maybe the much most recent Thinking, Fast and Slow (2013, Kahneman)...or perhaps even Sources of Power (1999, Gary Klein of Klein & Associates), or the many relevant journal articles on expectation bias over the years, or hired some of these authors as corporate consultants to help you train staff engineers on system design techniques of heuristics and biases in system-level design...and now consider yourself expert enough to lecture on expectation bias of loudspeaker shapes? Bravo! That makes at least two of us now that I know.
(Personally, I rather think you've realized that you didn't write your constraints at the top of the thread to exclude those proposing something more relevant to answering your questions than direct-radiator solutions, and don't know what to do...No?)
Chris
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The SP2-XT had pawn shop value and were stolen 9/2020. Hence the ugly diy replacements post # 35. If I leave the MDF unfinished and the toilet flange vents exposed maybe the perpetrator won't carry them off in future.
If anybody wants me to buy ribbons or silk dome tweeters they need to demonstrate them somewhere closer than London UK or Seattle, WA . None of those I've seen in concert venues or churches, either.
Best Three-way? Fifteen inch RS Mach-One replica, in a 1010 liter bass reflex enclosure, Three-inch Tangband softdome midrange, Peerless 1.25 inch Corundum tweeter.
An 800 hertz & 4500 hertz crossover....all three drivers perfectly matching at 90 Db sensitivity...the giant enclosure getting to an F3 at about sixteen hertz...all the "tricks of the trade, driver spacing, absorbent materials, radiused baffle edges, etc.
Not for "party" volume levels, but more for precision.
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An 800 hertz & 4500 hertz crossover....all three drivers perfectly matching at 90 Db sensitivity...the giant enclosure getting to an F3 at about sixteen hertz...all the "tricks of the trade, driver spacing, absorbent materials, radiused baffle edges, etc.
Not for "party" volume levels, but more for precision.
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I like where your head is at…..but that’s quite a distance from the mid dome to tweeter center for 4khz, no?…..you picked a monster flange tweeter! Lol
I think my fat ATC look alikes with sd315a, dc130, and nd25fw with active pc filtering and amps was under $1000. I learned a lot from them, lots of early frustration mostly due to inexperience. After getting the driver integration down, and living with them I struggle to motivate myself to build something else. Paired with two 10" dayton subs (wow it's all dayton, just realized that) behind me, the sound doesn't leave me wanting in any way. I mix on them as well. I do have some VBS 10.2 to finish up though.
I don't usually think DIY is a very cost effective way to get a speaker, but if you're making something pretty big like these, I think it's kinda crazy what you get, and man cheap drivers can sound phenomenol.
Be warned, when you get something like a big three way, it's hard to go smaller 😉
I don't usually think DIY is a very cost effective way to get a speaker, but if you're making something pretty big like these, I think it's kinda crazy what you get, and man cheap drivers can sound phenomenol.
Be warned, when you get something like a big three way, it's hard to go smaller 😉
Yeah, I noticed that one too....with those drivers in hand, I'm sure one could shave down those flanges to approach that cross-over frequency.
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Looking carefully at the sensitivity values of each driver in the graphs...at 800 and 4500 hertz they match up...
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