Hi gents,
I really can't decide...need your advice.
I have recently obtained 18 midrange drivers, they are nothing special, 4" , 5.8 ohm midrange from foster, they sound ok though, definitely need tweeter.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=013&item=230021875664&rd=1&sspagename=STRK%3AMEWN%3AIT&rd=1
I alredy have tweeters, mounted in two sets of six as short array, Linaeum, nice tweeters..
Now the problem is I can't decide between two configurations, both will be used with subwoofer.
Each has cons and pros, we can discuss it. I am open. Looking for your kind advice/suggestions.
Thanks, ed
Here are two options:
I really can't decide...need your advice.
I have recently obtained 18 midrange drivers, they are nothing special, 4" , 5.8 ohm midrange from foster, they sound ok though, definitely need tweeter.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=013&item=230021875664&rd=1&sspagename=STRK%3AMEWN%3AIT&rd=1
I alredy have tweeters, mounted in two sets of six as short array, Linaeum, nice tweeters..
Now the problem is I can't decide between two configurations, both will be used with subwoofer.
Each has cons and pros, we can discuss it. I am open. Looking for your kind advice/suggestions.
Thanks, ed
Here are two options:
Attachments
Sweet Sixteen is a very specific 4x4 configuration... you could build 1, but i wouldn't bother, they aren't very good... build a line array -- or a bipole or an omni -- you have enuff drivers to do an EPI Tower-style design with an MTM on each of the 4 faces. You could also fill the faces of a dodecahedron... (i'd leave the bottom one blank for a stand and the bottom back for input, using the top and front (up) for a pair of tweeters)
dave
dave
My spekers are a heaxonal prisms loaded with (16) 5" drivers and 3 tweeters each side - sort of an omni approach, with drivers on 5 faces of the prism. I've had them for a quarter century.
The Sweet Sixteen array is a plenty dumb design. Line arrays are the way to go. See my white paper.
Near Field Line Array White Paper
Near Field Line Array White Paper
Hi Gents,
thanks to all of you for the response.
Zobsky, Jim, yes, I will go ahead with array. Now what exact array....I will have to decide/ might need more help.
Dave, thanks for info about the sweet sixteen, I know it from Roger Russels web pages, and I was using the term very loosely. I did not mean to built one with sixteen drivers, but two sweet eight with tweeters. Anyway, just did not know better how to call it. I guess the rational behind my configuration "A" would be more coherent source.
No way am I going to built dodecahedrones, dave and wrenchone, first those 18 drivers I have are realy only midranges, not full ranges, so they would need aditional tweeters on each side. I do not have that many tweeters and those six are already mounted together. Plus, I am quite a lazy guy!
Thanks all,
I will have some more questions about the arrays, I am sure.
So the array it is. (my first!)
ed
thanks to all of you for the response.
Zobsky, Jim, yes, I will go ahead with array. Now what exact array....I will have to decide/ might need more help.
Dave, thanks for info about the sweet sixteen, I know it from Roger Russels web pages, and I was using the term very loosely. I did not mean to built one with sixteen drivers, but two sweet eight with tweeters. Anyway, just did not know better how to call it. I guess the rational behind my configuration "A" would be more coherent source.
No way am I going to built dodecahedrones, dave and wrenchone, first those 18 drivers I have are realy only midranges, not full ranges, so they would need aditional tweeters on each side. I do not have that many tweeters and those six are already mounted together. Plus, I am quite a lazy guy!
Thanks all,
I will have some more questions about the arrays, I am sure.
So the array it is. (my first!)
ed
Hi everyone,
just to show you that I was not kidding about building the array, here are some pictures from the progress.
I have only partly assembled one array and tested it with woofer section of other speaker. I will build the woofer separately on top of which array will sit.
The sound is promising, althought patheticaly unefficient in comparison to my vintage horn speakers.
Thanks for help,
ed
btw, I tried three wireing schemes, arrived at power tapering for midranges, tweeters not
just to show you that I was not kidding about building the array, here are some pictures from the progress.
I have only partly assembled one array and tested it with woofer section of other speaker. I will build the woofer separately on top of which array will sit.
The sound is promising, althought patheticaly unefficient in comparison to my vintage horn speakers.
Thanks for help,
ed
btw, I tried three wireing schemes, arrived at power tapering for midranges, tweeters not
Attachments
hi everyone
line arrays are happily playing already for couple of weeks
and they sound fabulous!
loud or quiet, they are making crystal clear music
they love power though
weak link are the subwoofers now, I am using unfinished closed boxes with 12" car woofers, I guess I need something bigger to keep up with mids and hight /or maybe an array ..../
midranges sounded quire dead from the start, but they opened up and are more dynamic, as dynamic as they can get, tweeters were slightly too soft from the begining, so I increased capacitor value slightly
so far everyone who listened to these speakers was amazed
they sound scary realistic ...I better do something about those subwoofers
here is the picture, they are still in the basement, well I run out of rooms in the house
line arrays are happily playing already for couple of weeks
and they sound fabulous!
loud or quiet, they are making crystal clear music
they love power though
weak link are the subwoofers now, I am using unfinished closed boxes with 12" car woofers, I guess I need something bigger to keep up with mids and hight /or maybe an array ..../
midranges sounded quire dead from the start, but they opened up and are more dynamic, as dynamic as they can get, tweeters were slightly too soft from the begining, so I increased capacitor value slightly
so far everyone who listened to these speakers was amazed
they sound scary realistic ...I better do something about those subwoofers
here is the picture, they are still in the basement, well I run out of rooms in the house
Attachments
hi clearwaterms,
I always start with simplest crossover possible
its passive at the moment, I am still tweeking, later I plan to biamp the array, with high current solid state for subwoofers and tube for mids and hights, will see...
I started with just a 5.5 mH inductor for woofers, with its own wire, separate wire goes to mid/tweeters, arrays goes thrue 150 uF bipolar cap paraleled with 0.1 uF high quality mp cap, mids are run open on top, I have listened to them with small inductor, but removed it later, they do not need it, tweeters are run with 6 uF cap. Thats at the moment, that might change once they final place/amp/signal source will be decided.
These arrays are my first and definitely not the last. They sound fantastic. I can hardly imagine the sound if I would use high quality drivers.
Cheers,
ed
I always start with simplest crossover possible
its passive at the moment, I am still tweeking, later I plan to biamp the array, with high current solid state for subwoofers and tube for mids and hights, will see...
I started with just a 5.5 mH inductor for woofers, with its own wire, separate wire goes to mid/tweeters, arrays goes thrue 150 uF bipolar cap paraleled with 0.1 uF high quality mp cap, mids are run open on top, I have listened to them with small inductor, but removed it later, they do not need it, tweeters are run with 6 uF cap. Thats at the moment, that might change once they final place/amp/signal source will be decided.
These arrays are my first and definitely not the last. They sound fantastic. I can hardly imagine the sound if I would use high quality drivers.
Cheers,
ed
its been a while, so i just want to post an update on the state of my line array
its been happily playing for some time without a change, which means the tweeking is coming to an end
signal is passively split at 120 Hz and buffered by mosfet, two subwoofers are 15" car woofers in closed box each powered by 45 watts chip amp thrue 5.5 mH inductors
line arrays are powered by SE tube amp without previous capacitor (bipolar cap removed), no crossover for mids, just 6 uF cap for the tweeters
sounds great
its been happily playing for some time without a change, which means the tweeking is coming to an end
signal is passively split at 120 Hz and buffered by mosfet, two subwoofers are 15" car woofers in closed box each powered by 45 watts chip amp thrue 5.5 mH inductors
line arrays are powered by SE tube amp without previous capacitor (bipolar cap removed), no crossover for mids, just 6 uF cap for the tweeters
sounds great
Attachments
I'm working on a similar project (barely started cutting wood though). From what I've been advised, you might try experimenting with poly fill and/or open cell foam on the rear of the U-baffle.
hi zobsky
any threads to point me to for a read? yes, my line array is open on the back, thats the way i like it for clarity in the midrange, plus dipolar radiation pattern
i have been experimenting with piezo tweeter in the back, since only midranges are dipoles, tweeters are aura line source with magnets on the back
adding piezo tweeter helped
i hear more hights, cleaner trebles upfront, do not know why
spaciousness with piezo has improved, generaly was very good already
i am very happy with these speakers, very dynamic, low distortion, flat response, high efficiency...all the advantages of line array
any threads to point me to for a read? yes, my line array is open on the back, thats the way i like it for clarity in the midrange, plus dipolar radiation pattern
i have been experimenting with piezo tweeter in the back, since only midranges are dipoles, tweeters are aura line source with magnets on the back
adding piezo tweeter helped
i hear more hights, cleaner trebles upfront, do not know why
spaciousness with piezo has improved, generaly was very good already
i am very happy with these speakers, very dynamic, low distortion, flat response, high efficiency...all the advantages of line array
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