The Line Array Thread

[JimJ 5,000+ posts]

I have come to find that individuals your age who talk a lot with no real data to back up what they say, are generally full of BS.

Hey now, what's "your age" encompass //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[80INCHES 5,000+ posts]

lol

80

 

[squeak9798 5,000+ posts]

age can defy knowledge is all that i will say to all of this //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Fortunately for us, that's not the case here........

 

[IamDeMan 5,000+ posts]

Hey now, what's "your age" encompass //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

There was 2 parts to that equation. You don't fit into 1 of the parts so that eliminates you from being included

 

[thylantyr 10+ year member]

The real trick to DIY loudspeakers is to build test boxes or a prototype. This

removes all the mystery. Use cheap wood like particle board.

Material costs to make quality cabinets ain't cheap and it wouldn't be sweet

to blindly design on paper and make a quality finished cabinet not knowing

what it might sound like.

ie,

reference this pic;

http://home.pacbell.net/lordpk/robarray/6.jpg

On the right there is a 5 NSB, 2 PT2 ported test box. I spent 1 month doing

listening tests, burning up NSB's, trying it sealed, stuffing it, etc. The idea is to exploit

performance on the test bench before you plan the big monsters.

Make a 1/2 or 1/4 scale version to see if you like it before proceeding. At least

see if there is synergy between a few NSB's and the tweeters you choose,

worse case just make a baffle to mount the drivers to get a crude idea on

where the project might be headed.

 

[brandontw 10+ year member]

24 tweeters?
//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

No. Only 1 per array, sorry, i have no idea why i wrote 24..i must have been thinking of something else.//content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif//content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

 

[brandontw 10+ year member]

My revised plan right now is 2 towers, 16 NSB's per tower, 1 http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=264-804 tweeter

Per tower, and I am undecided on the crossovers as of yet. These seem like a really easy way out though:

http://cgi.ebay.com/2-NEW-CERWIN-VEGA-SPEAKER-CROSSOVERS-2-WAY-300-WATT-NR_W0QQitemZ5809539296QQcategoryZ14977QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Each tower will be almost 6.5 feet tall, but I’m not sure of the dimensions yet because i can’t decide whether to go with sealed or ported. I think sealed might be for me if for no other reason than that I don’t want huge 6 cubic foot boxes in my room.

Sketch:



Real life:

//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Eugenics 5,000+ posts]

dear god, you made those?

 

[JimJ 5,000+ posts]

No, I think that's his plan...

 

[Eugenics 5,000+ posts]

a good photo regardless

 

[brandontw 10+ year member]

dear god, you made those?

No, i just happened to find that photo after i decided what i wanted to do and drew it in autocad. That photo looks almost excatly like what i am planning though....creepy.

 

[JimJ 5,000+ posts]

No, i just happened to find that photo after i decided what i wanted to do and drew it in autocad. That photo looks almost excatly like what i am planning though....creepy.

Not creepy, very good //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

Means the design's been tested //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[snb778 5,000+ posts]

thats rediculous....would it work to just use a horn??..much louder response

 

[JimJ 5,000+ posts]

Not always. Even if you manage to get an overall higher output with a horn, the dispersion pattern for the line array is still different.

 

[brandontw 10+ year member]

i cant wait to build em! im going to build em' at my dads house scince i live in an apartment and he has a high end harmon kardon processor/reciever and a parasound amp that i intend to use for the first test. Good times - 3500$ worth of stereo stuff hooked up to speakers made with 49cent drivers. hopefully they outperform his B&W speaks at high levels, i might end up building another pair for him.