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ASTX SA2014 Build Thread. 2 x 400W@4R with CNC machined case.
ASTX SA2014 Build Thread. 2 x 400W@4R with CNC machined case.
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Old 19th November 2017, 12:22 AM   #1
HYPERTUNE is offline HYPERTUNE  Australia
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Default ASTX SA2014 Build Thread. 2 x 400W@4R with CNC machined case.

After searching DIYA for suitable candidates, I have settled on designs by ASTX (Toni) for my upcoming HT and Living Room systems. I settled on Toni's designs for a number of reasons, mainly due to the fact that he has incorporated extensive protection and control features making them ideal for a family environment.

The living room system will be an active 3 (or 4) way, and the HT will eventually be 11.2 Atmos so we are talking quite a few channels...

To kick things off, I'm starting with a 2ch amp based off Toni's SA2014. This is a highly optimised amp with very low distortion combined with stability and reliability. Perfect. You can find more info here:

2stageEF high performance class AB power amp / 200W8R / 400W4R

Most of the BOM components are on the way. PCB's and some hard to get components from Toni

I have access to a rather well equipped CNC machine shop and the necessary CAD/CAM software. Most of the chassis components will be machined from solid aluminium. Here is what I've come up with so far:
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Old 19th November 2017, 06:37 AM   #2
astx is offline astx  Austria
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ASTX SA2014 Build Thread. 2 x 400W@4R with CNC machined case.
Awesome design! Self made case from solid aluminium block! Wow!

I like your idea making the IPS accessible from outside and placed far away from toroid and AC!
I will jump in with help whenever it is needed.
Many thanks for the decision building the flagship SA2014.

Have fun,

Toni
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Old 19th November 2017, 11:54 AM   #3
thimios is online now thimios  Greece
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Old 20th November 2017, 01:07 PM   #4
Kay Pirinha is offline Kay Pirinha  Germany
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Whooey! How unique this is!


And yes, I'm fully with you about Tony's elaborate designs in the amplifiers as well as in their protection and housekeeping environments.


Good luck to you and keep us up to date, please! Follow-up pictures are welcome to anybody here, I dare to claim :-).


Best regards!
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Old 3rd December 2017, 12:14 AM   #5
HYPERTUNE is offline HYPERTUNE  Australia
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My stockpile of components for SA2014 is growing..

I also took delivery of 4 x Audio Technology 15H52 midrange drivers, signed for me by Per Skaaning These drivers deserve a good amp, and vice versa of course
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File Type: jpg SA2014 parts.jpg (358.0 KB, 406 views)
File Type: jpg 15H52.jpg (357.7 KB, 388 views)
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Old 3rd December 2017, 09:42 AM   #6
astx is offline astx  Austria
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ASTX SA2014 Build Thread. 2 x 400W@4R with CNC machined case.
Complete pcb set for a SA2014 dual mono build (includes the new home for your big lytics )

BR, Toni
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File Type: jpg sa2014_complete_pcb_set.jpg (413.8 KB, 371 views)
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Old 3rd December 2017, 09:51 AM   #7
astx is offline astx  Austria
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ASTX SA2014 Build Thread. 2 x 400W@4R with CNC machined case.
Quote:
Originally Posted by HYPERTUNE View Post
...
... 4 x Audio Technology 15H52 midrange drivers, signed for me by Per Skaaning
...
Very nice drivers! Signed! Wow!
Do you have a link to your speaker build? Part list, schematics, case drawing?
BTW: my 2 subwoofers for LFE effects are powered by Audio Technology Flexunits 10 A 77 25 10.

BR, Toni
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Last edited by astx; 3rd December 2017 at 09:53 AM.
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Old 3rd December 2017, 10:42 PM   #8
HYPERTUNE is offline HYPERTUNE  Australia
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Those boards look awesome Toni. Cant wait to get my hands on them

I haven't finalised the design yet, but it will be an active in wall 3 way for the living room. The front baffle will be CNC machined aluminium (of course ) so I might take advantage of that to do some kind of waveguide loaded tweeter.
Maybe a W-T-M-W using the Scan-Speak 28W for woofers:
http://www.scan-speak.dk/datasheet/pdf/28w-4878t00.pdf

At this stage the plan is to use the "Ultimate Preamp" to tie it all together:
Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project

Please note that the house isn't built yet so there is plenty of time to come up with a plan House will be somewhere around those piles of dirt...
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Old 4th December 2017, 08:02 AM   #9
astx is offline astx  Austria
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ASTX SA2014 Build Thread. 2 x 400W@4R with CNC machined case.
Plenty of room for all SA20xx variants .

I see you like the same speaker manufacturers as I do.
My main speakers (front/rear L/R ) are diy "M50 TL TA" (transmissionline; partially active; Scanspeak 26W8867T, ATC 75 SM 150 -16, Scanspeak D3004/6640 Beryllium) from this speaker developer site:

A.O.S. Audio Systeme

Top speakers and PC monitors are models "ILLU18-8 BE" (passve; Scanspeak 8WU8741T, D3004/6640 Beryllium)
with scanspeak drivers.

Subwoofers are Audio Technology Flexunits "10 A 77 25 10"

BR, Toni
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Old 18th December 2017, 09:07 PM   #10
HYPERTUNE is offline HYPERTUNE  Australia
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Default PCB's arrived!

PCB's and some other parts arrived from Toni a couple of days ago. Thanks Toni!

Going well so far, but I need to order a few more parts that I either forgot or were not in stock.

Soon I will start matching the transistors with Atlas DCA Pro. Any advice regarding acceptable tolerances would be appreciated.
Attached Images
File Type: jpg SA2014_1.jpg (752.7 KB, 115 views)
File Type: jpg SA2014_2.jpg (633.1 KB, 113 views)
File Type: jpg SA2014_3.jpg (839.2 KB, 105 views)
File Type: jpg SA2014_PS.jpg (818.3 KB, 106 views)
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