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Obtaining my White Whale (25 Driver IDS-25 Line Array Build)
Obtaining my White Whale (25 Driver IDS-25 Line Array Build)
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Old 15th April 2019, 06:01 PM   #1
Nvphotos is offline Nvphotos
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Default Obtaining my White Whale (25 Driver IDS-25 Line Array Build)

I've been sitting on the desire to build a pair of nearfield line arrays for the last 6 years after reading the work of Roger Russell and his column systems. 5 years ago I started building a prototype pair with cheap $1 Aurasound 3" with the end goal of building a separate, finished pair with Peerless TC9's. I never finished those after moving from NY to Florida for work.

To make a long story short... I finished them! Below are photos of the build. It has taken me several months to get them done and that was with having a cabinet maker build the cabinets. I never realised how many technical design decisions went into making these.

My goal was to have the best performance in a $3,000 budget (most of that went into the cabinets).
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Old 15th April 2019, 06:21 PM   #2
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(Once I figure out how to upload photos) Here is the prototype my cabinet maker made for approval before building the final cabinets. The construction quality was fantastic but I ended up making a lot of asthetic/performance changes. As you can see, we experimented with a full length grill option that would have been a full length sheet of perforated metal.
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Old 15th April 2019, 06:23 PM   #3
Mooly is offline Mooly  United Kingdom
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Obtaining my White Whale (25 Driver IDS-25 Line Array Build)
Its easy

How to attach images to your posts.
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Old 15th April 2019, 06:26 PM   #4
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Thank you!
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File Type: jpg 20190309_112522.jpg (336.6 KB, 541 views)
File Type: jpg 20190309_112531.jpg (367.6 KB, 539 views)
File Type: jpg 20190309_112536.jpg (333.7 KB, 524 views)
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Old 15th April 2019, 06:38 PM   #5
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The biggest change was to figure out if we could flush mount the drivers and which routing method worked best to allow the drivers to breath in the back.
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Old 15th April 2019, 06:48 PM   #6
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Here is the flush mount test as well as two styles of routing for the back of the drivers. I settled on the simpler of the two as it saved time and wasn't sure the extra meat for the screws was worth the extra complication.
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File Type: jpg 20190319_190934.jpg (274.1 KB, 486 views)
File Type: jpg 20190319_190942.jpg (346.7 KB, 145 views)
File Type: jpg 20190319_191007.jpg (245.9 KB, 133 views)
File Type: jpg 20190319_191044.jpg (282.8 KB, 161 views)
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Old 15th April 2019, 06:53 PM   #7
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I had gaskets made on a water jet at a local rubber and gasket company to seal the drivers to the cabinet. I made the template in Photoshop. They cost $1.35 per x 50. Way better than cutting them individually by hand!

The flush mount in the cabinets were measured and tested the for these gaskets and remain flush.
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Old 15th April 2019, 06:56 PM   #8
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Making progress...
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Old 15th April 2019, 08:12 PM   #9
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Default How to find the sweet spot

Question for you line array guys before I return to posting build photos. How do position them to get a good sweet spot in the listening position? They have such a large sweet spot that it's like not having a sweet spot at all. I have no problem positioning point source speakers.

Is ironic, I built them to hear this huge sweet spot. Now I can't seem to find it because it's so huge.
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Old 16th April 2019, 12:40 PM   #10
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This is the rounded baffle edges we prototyped.
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