The Line Array Thread

[JimJ 5,000+ posts]

Yeah, go with the textbook Xover just to get 'em built...a reason I don't like them is because of the power losses they tend to have. If you design your own, you can make it more efficient.

 

[thylantyr 10+ year member]

There is an NSB/PT2 array in my house with;

10 PT2 per tower.

16 NSB per tower.

4 chambers per tower, 1.5 cu. ft. per chamber

100hz tuning, ~ 6dB peak

Four 6" ports per tower, one per chamber

2 ohm wiring

2.4kw pro amp

+ room gain

Gives me a clean 126dB peak c-weighting SPL when listening to bass guitar on my Jazz DVD, midrange SPL peaked around 122dB, at the listening position.

This is using the Radio Shack cheapy meter. I like loud and clean music and

even 115dB c-weighting is pretty crazy for most people. Usually when people

come over they think it's loud at volume number --> 1 [lol]

There is no subwoofer installed right now to complement the array because the array is not for me, I'm holding it for friend and still tweaking around on it.

The part that amazes me more is -> the power handling, I high pass at 65hz,

LR 8th order, drive the amp to clipping, that's 1200w/ch and the NSB don't smoke. I was able to smoke them on my five NSB test box with the Adcom 200w/ch amp, but not the big array using the 2.4kw pro amp.

There is power in large numbers, like an army of ants //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

Whatever you do, that NSB frame lip is 'teh svck' and you have to make sure

you get the right size hole to ensure a good seal. I had to modify my rabetting tool to get a precision cut so the NSB fits perfect. Then use PE rope caulk to make

a perfect air tight seal. Any air leaks ruins performance.

Also, the front baffle if 3/4" thick or greater chokes the NSB backwave {backwave compression}, it's better to chamfer the holes on the backside to allow the driver to 'breath'. This weakens the front baffle though so pick a driver spacing that you can work with, maybe a 4 3/8" to 4 1/2" c-t-c spacing. I reinforced the routed rear baffle with little blocks so a karate chop won't break the baffle

Even thought some people disagree with NSB SQ, you can make them do amazing things if you pay attention to design details and optimize everything.

The real heart of the system is the planar tweeters, they steal the show, the

NSB's are backing vocals - //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[JimJ 5,000+ posts]

Big amps...bah //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[PV Audio 5,000+ posts]

Right now I am eliminating complexity out of the build to get it done. Alterations and tuning can be done later. No offense but you would be the last person I PM for advice in this build.

none taken, but as i build crossovers as a service and i actually care about detail vs. "getting it done", i would rethink that statement //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[IamDeMan 5,000+ posts]

none taken, but as i build crossovers as a service and i actually care about detail vs. "getting it done", i would rethink that statement //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

There are many people with more experience on the audio boards than yourself. After the pubics fully grow in and you can control your "caulk" from squirting everywhere, then maybe we'll talk shop. For now Thylantyr seems to have an extensive amount of knowledge in this particuliar alignment so no rethinking is needed.

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

 

[PV Audio 5,000+ posts]

There are many people with more experience on the audio boards than yourself. After the pubics fully grow in and you can control your "caulk" from squirting everywhere, then maybe we'll talk shop. For now Thylantyr seems to have an extensive amount of knowledge in this particuliar alignment so no rethinking is needed.
//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

learn before you bandwagon is all that I have to say. you have no knowledge of my true designs or abilities, so you should stop talking unless you actually know the person that you are talking to. yes thylantr is VERY, VERY knowledgeable about HA setups as i have talked to him extensively. so "getting it done" isn't really a valid excuse for shunning me.

have a good day //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Randy Savage 5,000+ posts]

Right now I am eliminating complexity out of the build to get it done. Alterations and tuning can be done later. No offense but you would be the last person I PM for advice in this build.

PWNT!

 

[PV Audio 5,000+ posts]

yeah very //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[Randy Savage 5,000+ posts]

>j00

 

[JimJ 5,000+ posts]

There are many people with more experience on the audio boards than yourself. After the pubics fully grow in and you can control your "caulk" from squirting everywhere, then maybe we'll talk shop. For now Thylantyr seems to have an extensive amount of knowledge in this particuliar alignment so no rethinking is needed.
//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

//content.invisioncic.com/y282845/emoticons/clap.gif.178cba2c538c68e720c727fcb024b19c.gif//content.invisioncic.com/y282845/emoticons/ohsnap.gif.17c4c91be09a7a4a3995fb7145adac39.gif

 

[PV Audio 5,000+ posts]

i guess i'll have to get these towers finished up to show y'all whats up //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[JimJ 5,000+ posts]

Be my guest //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

You post 'em, we'll tell you what's up //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[PV Audio 5,000+ posts]

Be my guest //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
You post 'em, we'll tell you what's up //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[IamDeMan 5,000+ posts]

learn before you bandwagon is all that I have to say. you have no knowledge of my true designs or abilities, so you should stop talking unless you actually know the person that you are talking to. yes thylantr is VERY, VERY knowledgeable about HA setups as i have talked to him extensively. so "getting it done" isn't really a valid excuse for shunning me.
have a good day //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

I read more than I talk. Something you should learn to do. From my reading I have learned the following.
1. You are younger than the hair on my balls.

2. Your fist attempts at building enclosures were less than desirable.

3. You have no extensive worklogs with real information in them showcasing your so called expertise.

4. You talk a lot.

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.

Getting it done is the goal for this project because it is a learning excercise in building this alignment. It is not an exercise in furthering my knowledge of creating Crossover networks. That crossroad will come when the unit is built. Switching out crossovers and adding LPAD isn't a terribly hard thing to do once the unit is built. Picking a point of reference that is easy to incorporate during this initial build is a better solution for this project.

Now excuse me while I jump back on this bandwagon and ride off into the sunset.

 

[PV Audio 5,000+ posts]

I read more than I talk. Something you should learn to do. From my reading I have learned the following.
1. You are younger than the hair on my balls.

2. Your fist attempts at building enclosures were less than desirable.

3. You have no extensive worklogs with real information in them showcasing your so called expertise.

4. You talk a lot.

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.

Getting it done is the goal for this project because it is a learning excercise in building this alignment. It is not an exercise in furthering my knowledge of creating Crossover networks. That crossroad will come when the unit is built. Switching out crossovers and adding LPAD isn't a terribly hard thing to do once the unit is built. Picking a point of reference that is easy to incorporate during this initial build is a better solution for this project.

Now excuse me while I jump back on this bandwagon and ride off into the sunset.

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