Pondering an IDS-25 Clone (sort of) for HT

[oneplustwo]

The sides are solid 3/4 mahogany, the top is 1/2 MDF with mahogany veneer.
The armboard is mahogany and bubinga glued together, with the bubinga showing (wanted a little contrast).
The finish is my own little mix of regular polyurethane and danish oil applied with fine steel wool.
I did the plinth after not being happy with the original, WAY to sensitive to environmental influences.

Looks great! What are the internals? Donor from another table?

[flamethrower1]

It has the original Systemdek IIX suspension with the new springs I had made.
I installed a ceramic bearing from Boca Bearing.
Also. for now it has the original control board for a brand new Premotec motor with the SRM TECH bearing.
The pic from above was from when I was experimenting with a Mose/ Hercules power supply, could never get it to spin at he correct speed even with a 50Hz pulley, it was always around 2+ RPMS hot.
So here are the pics with the switch I added the switch to the plinth.
Oh and I did add Pete Riggles VTAF
It is a nice sounding deck

[Steve Manning]

Very nice job on the turntable :T

[oneplustwo]

I got half of my order... apparently, the sale drove them out of stock. The rest won't arrive until May supposedly. Not a problem since we're finally packing the house as our building permit was approved... two years in the making. I took one out and was surprised at how small they are! I knew what size they were on paper, but for some reason, it didn't really hit me until I saw them in person. So... they're going in storage for a while now.

[JonMarsh]

Step by step... Slow work takes time! I haven't forgotten about this project, but there is so much stuff going on this year, it's just amazing!

Glad to hear you've got your building permit settled and can proceed with that work. There's a lot of that kind of stuff going on here in this older neighborhood in Danville, where I live, for much the same reasons. I bet you and the rest of your family are very excited about what's coming!

[wkhanna]

flamethrower1....

your tables are gorgeous!
V nice!

[flamethrower1]

Here is a finished plinth I shipped out yesterday, Kind of "Emotiva" inspired

[wkhanna]

link to your tt site?

[flamethrower1]

Sorry, no link yet.
Will be soon though, will keep you posted.

Thanks, Greg

[wilbur-x]

Line source (array)

Here is our approach to a rigid line source. Each driver got its own damped chamber (Aura). No column resonance detected. Tweeter is Fountek ribbon.

[sdl2112]

Awesome concept and implementation. :T Show us more!

[JonMarsh]

+1 on that- looks very well done! :T

[bobyoungren]

+2 Very interesting looking build.

[---k---]

Wow! Very impressive looking. Please share more.
Are those Accuton drivers? I usually think Accuton when I see white, but I can't quite wrap my head around the cost of 20(?) per side.
What is the reason for the rear mounted drivers? Is mini-waveguide functional to extend the response or just to look very cool and hide fasteners? I'd be curious to so see an individual driver measurement face mounted versus rear mounted.
What is in the middle without the maze? A tweeter?

[flamethrower1]

Wow, that looks like it took some time.
Impressive.
Good job.

[CraigJ]

"Are those Accuton drivers? I usually think Accuton when I see white, but I can't quite wrap my head around the cost of 20(?) per side."

I'm guessing when Wilbur mentioned "Aura", he's referring to the AuraSound NS3-193-8A 3" Extended Range Driver 8 Ohm

[---k---]

[QUOTE=CraigJ I'm guessing when Wilbur mentioned "Aura", he's referring to the AuraSound NS3-193-8A 3" Extended Range Driver 8 Ohm[/QUOTE]

Thanks. That makes sense. Looks roughly the same price as the Vifa driver that started this thread. I'd be interesting to hear about the driver selection.

[flamethrower1]

I was looking at the specs to these and noticed that the xmax seemed quite a bit higher than the Vifas.
Went to check the specs on the original drivers and it looks like there are not many of them available any longer.
Glad I have 52 of them laying around, now all I need is the time to build them again

[wilbur-x]

Thank you for your kind words. I apologize for late answer- due to a short vacation.
AuraSound NS3-193-8A drivers was chosen due to "pretty face", an open rear window due to neodym magnet and acceptable parameters.
Cabinets are designed by me, but are made by the owner who is a wood-work teacher (furniturer etc).
The feet are made from ice hockey pucks :-)
Front baffle do cover an inner baffle which the drivers are glued to.
Rear baffle (back) do cover the connecting board.
The drivers are wired as power tapered with a notch at approx 6 kHz.
Tweeter (Fountek JP-3) tuning was very time consuming. (I do not have the configuration / values any more)
This turned out to be a successful project. However, the owner used them for approx 2 months- he always eager for building something new.
The speakers were sold to a happy new owner who needed only 4 minutes of listening.
Personally I will for shure get my own line arrays as I liked the soundscape very much.
Some photos:

[Renron]

Routering all those holes would have turned me into a nervous wreck. Too much stress. That turntable looks gorgeous. Very nice wood work and attention to detail.
I've heard those Auras in a curved line array, like the one from Parts Express. Sounded very nice.
Ron

[flamethrower1]

Okay, here is a blast from the past, just thought I would through this out there.

http://www.nearfieldacoustics.com/Products.php

I just ordered 4

[TEK]

http://www.nearfieldacoustics.com/Products.php

I just ordered 4

Holy shit! 8O
BTW: why 4? Why not two, tree or five - all numbers that comes to me as more natural than fore?

[BobEllis]

It's a blast from the past - he's going quadraphonic.

[JonMarsh]

Okay, here is a blast from the past, just thought I would through this out there.

http://www.nearfieldacoustics.com/Products.php

I just ordered 4

:B


But the question of the day is, will you invite us over (in reality or virtual reality) to see and hear them after you get them setup?

Does seem a bit pricey... would like to see THD sweeps of these, too.

I havne't forgotten about this idea, but it's definitely on the back burner... probably will remain there as an experiment to conduct for "fun" in a few years.

Their description of the tribal drummers sub suggests a compact sealed system with Linkwitz EQ and lots of power... (operating below resonance)

[---k---]

Those look very familiar. ...
$100,000 seems ridiculous. But, I'm guessing they're only going to sell one or two pairs a year. When you think of it that way, no one is getting insanely rich off these things.

Oh, and they will sell it in a kit form too... But, I didn't see the price.

I would still love to hear one of these. I got to listen to ChasW's line array way back in the day. But it was on his patio listening about 5 feet from the speakers and not all set up. What I heard was impressive. But, not a good A-B demo.

[Renron]

"The low end is enforced by dual Tribal Drummers".
"I ordered 4"
$100,000 / Pair
:surround::laughat:

[Mazeroth]

Bumping up this 2 year old post!

JonMarsh, I'm getting ready to design the enclosures (CNC cut) and order some drivers. I've been going back and forth with which drivers to use to clone the IDS-25 and I'm really liking the RS100's you mentioned in post 86:

https://www.htguide.com/forum/showthread.php?42482-Pondering-an-IDS-25-Clone-sort-of-for-HT&p=601768&viewfull=1#post601768

Before I jump in on the truncated RS100s, can you guys think of any other drivers I should be considering?

I currently use 3 line arrays for the LCR in my theater, behind an acoustically transparent screen, utilizing Aura NS-193-8A. They sound absolutely fantastic. They're flat from 80-8khz, before they start to drop off in the upper frequencies. I'm not EQing them, as they're only used for home theater and above 8khz I'm not too concerned. Also, they cross over to 4 12" Adire Shivas sealed at 80 hz, so no need to worry about the low end. For these speakers I'd like to build, I'd like them to perform like the IDS-25 and not need a subwoofer. Roger claims they're flat to 20, but I'd be happy with 35-40hz as these would be used for music. I will definitely be applying EQ with something like a miniDSP.

EDIT: I should clarify, these speakers will not be replacing the arrays in my theater. These will be only used for 2-channel music.

Thanks in advance for any input!

Image not available

[oneplustwo]

Not sure if you've read the posts over on diyaudio? Here's mine: https://www.diyaudio.com/forums/full...9-drivers.html

And here's perhaps THE most comprehensive thread on any topic over there: https://www.diyaudio.com/forums/full...ine-array.html

In my opinion, you would be hard pressed to do better than the Vifas, even if you weren't normalizing against the value of those drivers.

[flamethrower1]

Just in case you are interested, I have 52 of the original Vifas that were originally used, brand new in box.
Due to health reasons, I am not going to build another set.
Will do you a solid and give you a great deal on them

[JonMarsh]

Just in case you are interested, I have 52 of the original Vifas that were originally used, brand new in box.
Due to health reasons, I am not going to build another set.
Will do you a solid and give you a great deal on them

I'll keep that in mind and look at my cash projections for the next few months...

it's interesting going back and reading this post- what I find is that between work and starting to get back into DIY, I'm lucky that I believe in "journaling" in a fashion and keeping a lot of records- because there's just so much info that flows through, and much that gets dropped from "medium term" memory but can be quickly recovered with a fast read (reading is my only super power- in the 3rd grade I had high school graduate reading level comprehension and could read faster than my teacher- proven on this machine she had for testing reading speed, a scanning projector). (I get very impatient when a news site takes you to a video only version of an article because it's so slow compared to reading...)

Every time a new small "full range" driver comes out I check them out, but so far these Vifa's seem to be the clear value king, and still mostly the performance king.

One challenge to doing this would be tooling up for the panel construction- making a baseplate jig for a small form factor router...

Right now, I'm a bit challenged for spare time, too, due to my relatively new Russian girl friend, a genuine Babushka. Like me she's very much into hiking and walking outdoors.

Thanks again to everyone for all the information sharing on this thread.

[Drayman]

Just in case you are interested, I have 52 of the original Vifas that were originally used, brand new in box.
Due to health reasons, I am not going to build another set.
Will do you a solid and give you a great deal on them

Hi, I am brand new to the forum, but have been contemplating an IDS-25 build for months. Been reading a ton here and at DIYAudio for a while. Thanks to Jon Marsh I already secured a couple sheets of LBL I am very interested in those drivers since the unshielded TG9 8 ohm version now have a minimum order size of 1,000 units. Will contact you or vise versa.

-Drayman

[Drayman]

Thanks, Jon for all your work on the forum. And thanks for validation on the TC/TG drivers. Months of sweat and tests bring me back to the same place.

And +1 on the Russian Babushka!