2 ways or 3 ways horn BMS coax or Raidian 950..etc..a newbie with too much questions

[hahayan]

i start learning all those electronic and speaker design..and a bit about horns..etc..from 3 weeks ago.. i think i am ready to build my first speaker
i am using Maxx2 and Grand slamm (just sold) , i had JBL everest dd66000, but not impressed, part of the reason it is till small to fill my room. listening space is around 850/900 sq ft, listen to most type of music, (least for vocal), always enjoy very dynamic , very transparent, fast transient, (i suppose we all are) i enjoy to feel the 11ft or much deeper sound stage.., very wide.., tonal preference always at a bit of cool side, but not too warm. i wish to invest not more than one yr, to come up with my own speaker which at least better than the Maxx2, i suppose it is not that hard, or i am a dreamer

it will be horn, and it is very likely to be E-Jmlc 300 horn, couple with 4 bass drivers

many questions...

1. 2 ways or 3 ways?, as i heard some TAD and Rey monitor, they are 2 way, sound good and simple, may disagree we should not care too much anything above 16khz..i am not sure, if i go for 2 ways, what drivers..as my listening experience for horn is very limited (TAD based, Vintage JBL...etc.westlake.. )..Radian measurement seem good upto 20Khz, BMS Coaxial 4590 also seem nice, it think it is ok to be driven from 500hz or 700hz till..20khkz with a simple 2nd order crossover

1. 3 ways, more question.. Upper cut off for the mid range ..8Khz , 12khz.., then..tweeter.., a 1" compression unit, or some sort of super tweeters..like those from Fostex..etc ? is it always wiser for mid range and HF driver to be one brand?

i have a few good powerful amp, but they seem to be too powerful for mid and hf..horn, however i should not care about that at this stage

summing up, it would be nice to have some more advices - mid upper crossover frequency range, tweeter choices, drivers selections

horn preference at this stage is E-JMLC 300

merry Christmas for all of u..hahahahaha

[SunRa]

Hi, if you want to throw big bucks at such a system, take your time and read Lynn's Olson thread "Beyond the Ariel" on this forum. It starts with considering a coaxial unit (woofer and compression driver) and then starts discussing various compression drivers and horns, as well as woofer topologies in a 2 or 3 way system. It's a long thread but very informative, I've learned a lot about speaker design from there. After reading that you'll have a better idea on what you need/want and how to get it. Also Garry Dahl has completed a system based on that thread and you can find it documented somewhere near the end of it.

[dirkwright]

Originally Posted by SunRa

Hi, if you want to throw big bucks at such a system, take your time and read Lynn's Olson thread "Beyond the Ariel" on this forum. It starts with considering a coaxial unit (woofer and compression driver) and then starts discussing various compression drivers and horns, as well as woofer topologies in a 2 or 3 way system. It's a long thread but very informative, I've learned a lot about speaker design from there. After reading that you'll have a better idea on what you need/want and how to get it. Also Garry Dahl has completed a system based on that thread and you can find it documented somewhere near the end of it.

wow, I would not have thought to look in that thread for that information! thanks.

[hahayan]

Originally Posted by SunRa

Hi, if you want to throw big bucks at such a system, take your time and read Lynn's Olson thread "Beyond the Ariel" on this forum. It starts with considering a coaxial unit (woofer and compression driver) and then starts discussing various compression drivers and horns, as well as woofer topologies in a 2 or 3 way system. It's a long thread but very informative, I've learned a lot about speaker design from there. After reading that you'll have a better idea on what you need/want and how to get it. Also Garry Dahl has completed a system based on that thread and you can find it documented somewhere near the end of it.

thx for you x mas gift..haha, beside that..., i shall get some changes from selling my maxx2 and learn a great deal, why not, i do not want to by any more speaker..but make one

[SunRa]

With the money you get on maxx2, you might just as well do this:

OCTAGON



edit: hell, you can do it twice

[SunRa]

Originally Posted by dirkwright

wow, I would not have thought to look in that thread for that information! thanks.

Yeah, lot's of good info there. There are loads of discussions about constant directivity, diffraction effects, the importance of low distortions, how to get most of the frequency graphs you read, but also there are detailed discussions on Radian compression drivers, 18Sound CD's and woofers, Tone Tubby's, you will find lots of stuff there. Also, various waveguide/horn profiles are discussed.

[hahayan]

"Lynn's Olson thread "Beyond the Ariel""...omg..over 500 pages..

[ScottG]

Beyma: TPL 150H
PHL Audio: 3040, with DDS Horn: DMB 10N Pro
18Sound 15W500, with DDS Horn: DVB 15N Pro

Large aperiodic enclosures for the mid and bass.

Subwoofer*s* based on Precision Devices: PD2150

[hahayan]

Originally Posted by ScottG

Beyma: TPL 150H
PHL Audio: 3040, with DDS Horn: DMB 10N Pro
18Sound 15W500, with DDS Horn: DVB 15N Pro

Large aperiodic enclosures for the mid and bass.

Subwoofer*s* based on Precision Devices: PD2150

thx..thx..what is the best trick to ensure "aperiodic" ?

[ScottG]

Originally Posted by hahayan

thx..thx..what is the best trick to ensure "aperiodic" ?

You could use multiple's of these:

Scan Speak 29001 Flow Resistance Vent 296-546

This is nothing more than some "lossy" rockwool fiber-board in a very shallow "cup" with a grill. You could diy this yourself with ease.

As for use it depends on the application, but often a surface area of "venting" is equal to about 1/2 to 2/3rd's the area of the driver and typically placed directly "behind" the drivers (on the rear panel of the loudspeaker). Too little and the effect is low, too much and you'll start to get pressure loss as a cardioid at lower freq.s (depending on box shape and size)..