Help choosing driver for line array project - AVS Forum
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post #1 of 14 Old 06-26-2012, 09:51 AM - Thread Starter
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Hello, I posted a thread up at talk tech so I thought I could get some advise from you guys as well. I was so sure I was set on 12 Dayton Nd140s per side but my wife asked me to do 9 instead for height sake. So now I'm thinking of moving to a 6-1/2 and doing nine per side of those. But saw that if crossed to a tweeter too high you could run into comb filtering issues. So I have a small list of drivers and was hoping to get a tally on what would you use if you were building an array. I want impact, if I could get to 60-70 hz I'd be fine. I just want clarity, dynamic, chest thumping audio. It would be nice if I didn't have to wait until august for the nd140s also. Id like to be able to cross to the tweeters somewhat high, tweeters are not chosen yet. This will be managed by a behringer deq2496 (maybe mini dsp, would that work as eq and crossover?)

12 Dayton nd105s
http://www.parts-express.com/pe/show...number=290-214

9 hivi m6n
http://www.parts-express.com/pe/show...number=297-441

Or 9 of peerless offerings
http://www.parts-express.com/pe/show...umber=264-1146

http://www.parts-express.com/pe/show...umber=264-1088

Or stick with 9 nd140s and wait until August for the drivers?

Thanks
Dan

PS if you have other suggestions in the price I'm looking let me know. This has to be aesthetically pleasing as well do the aura 6-1/2" is out.
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post #2 of 14 Old 06-26-2012, 07:27 PM - Thread Starter
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Nobody?!?
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post #3 of 14 Old 06-26-2012, 07:30 PM
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links dont work.
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post #4 of 14 Old 06-26-2012, 10:03 PM - Thread Starter
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Ugh.
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post #5 of 14 Old 06-26-2012, 10:10 PM
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Go for those Aura 6"er's that are always on clearance.

My Dual 18" LLT subs 120dB down to 10hz

 

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post #6 of 14 Old 06-27-2012, 03:51 AM
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I currently have a budget pair consisting of 16 of these per side:
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=299-289
and 42 of the apexjr tweets.

I will be rearranging these to go in-wall for my front three and am planning for 12 of the mid-woofs in each, with 30 of the tweets. This is crossed (3200 LR4) and eq'd with minidsp.

All of your choices are decent and with eq you should be very pleased with what you can do with any of the above.

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post #7 of 14 Old 06-27-2012, 05:05 PM
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im be testing a line array probably 5 per channel with a subwoofer xo @ 300hz of these http://www.parts-express.com/pe/showdetl.cfm?PartNumber=297-2150 not cheap but if there offaxis is as good as it should be it could end up being quite nice.
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post #8 of 14 Old 06-28-2012, 09:16 PM
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Quote:
Originally Posted by saabracer23 View Post

Ugh.

Have you read Jim Griffin's white paper?

JSS
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post #9 of 14 Old 06-28-2012, 11:28 PM - Thread Starter
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I have, though it was hard lol. I think I've settled on the Dayton reference rs150t as my mid. I'm looking at tweeters and just go with the flow.

Dan
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post #10 of 14 Old 06-29-2012, 04:40 AM
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Don't go RS150. too large C-C distance. Try RS100-8 at most for mid line, unless a 3-way speaker is in the picture. ND16FA or ND20FA with clipped bezels for better C-C for tweets.

Download this:

www.pvconsultants.com/audio/radiation/vpr.htm

Play with it. take a look at what happens when you change driver size and c-c spacing. We always cuation folks who rush into building any speaker, and line arrays are just as difficult to get right. If you do not have measurement gear, do not even attempt this.

JSS
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post #11 of 14 Old 06-29-2012, 09:32 AM - Thread Starter
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The rs150t has about 1-1/8" more ctc spacing than the rs100. Would that be much of a problem? For now I think that a 3 way is out. I would need more amplification and another channel of eq which costs more than I have. I've seen arrays with the full frame rs150 which has a greater ctc spacing built by selah audio. I know Rick knows what he is doing, how do you think he was able to make it work? I just want to be able to reach 70hz in a two way setup.

Thanks,
Dan
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post #12 of 14 Old 06-30-2012, 05:20 PM
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Quote:
Originally Posted by saabracer23 View Post

The rs150t has about 1-1/8" more ctc spacing than the rs100. Would that be much of a problem? For now I think that a 3 way is out. I would need more amplification and another channel of eq which costs more than I have. I've seen arrays with the full frame rs150 which has a greater ctc spacing built by selah audio. I know Rick knows what he is doing, how do you think he was able to make it work? I just want to be able to reach 70hz in a two way setup.
Thanks,
Dan

It all depends on how low your tweeters can cross.

Selah Audio

Thinking Inside the Box...
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post #13 of 14 Old 06-30-2012, 10:31 PM
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If your after 70Hz have a look at Bill Fitzmaurices TLAH line arrays. They use a transmission line to extend the lower reponse of a two way design. Just thought I'd offer it as an Idea.
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post #14 of 14 Old 07-02-2012, 07:58 AM
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Like I said, download the spreadsheet and play with it. You can port the RS100s to reach 70Hz.

Line Arrays are a compromise, like any other speaker. They will have varying freq response based on distance, and will lobe unless power shaded (again, check the spreadsheet, you an play with power shading as well with it).

The BFM TLAH is a value speaker, IMO. It will get you lots of the way there for very little $$. But if you are looking at drivers in the RS class, you may have a budget that may mean you can forsake the value that the TLAH is for something better. If budget is an option, BFM speakers are not bad. But they use several different drivers, and a generic crossover, and will generally need EQ to sound best.

If you are looking to spend over a year testing and optimizing, by all means, start your own line array design. But at least one has already mentioned Selah Audio. They have been doing arrays for a long time. Budget is pricey, though.

JSS
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