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Messages - yoke

#1
Your Active Speaker Designs / One more try - 4 way
April 24, 2024, 04:16:48 PM
Hi
Here is one more try, but this time more complex
just test cabinets
whell, thay are test cabinets for the last year + ...as I'm a little lazy and undetermined how to procide with final design but will get there...eventually ;)

basic informations :
- RAAL 140-15D - Hypex NC100HF
- Satori MW13TX-8 in 6L - Hypex NC252MP - one half
- 2 x Satori MW19TX-8 in 18L - Hypex NC252MP - other half
- 2 x SBa SW26DBAC76-8 in 16L (with linkwitz transform) - Hypex NC500MP

All closed box design
Sound is really nice


But will try 2 x Satori MW19TX-8 in 50L bass refleks - just to see what I will get

and 1 x SBa SW26DBAC76-8 in 12L, I have the filing that 8L for it is just a too little...will try...

Here are some videos
I know that you can't judge sound by youtube videos, recorder on mobile phone, played on one or so ;)
but it can give you some idea about the sound
I like to watch them, and like to record them, but I know the limitations of them ;)


will get back once I make some progres ;)

Josip

#2
Hi David,
Any plans for lower cost modular option ?

I'm building new pair of loudspekaers, active witn hypex mcXXXmp amplifiers.

For me, it would be great if I could place DSP inside loudspeaker cabinet.
So I would need two DSP boards, one for left and one for right channel ;)

Hypex have some 3 way DSP solution (FA series) but thay are not high end as yours.

Olso, it would be great to have some option for presets.
So that we dom't have to use audioweaver every time we would like to "hear" or compare two diferent setings...not to mention licence for it...;)

Any way, I know how much work and time you invest into those, thay are high end products but it would be great to hove something that is more affordable for "normal" diyer.

I think that now days active sistems are great solition as we have more and more good and low cost amplofiers and drivers but we are limited with DSP solution.

I belive that you know how to make good product, and maybe to produce raedy made main DSP boards with kit option (PCB with or without parts) for diy (power supply and output boards or so).

Sorry for bad english ;)

Best regards
Josip

#3
Quote from: spiner on July 28, 2021, 03:22:48 AM

I took a second look at the coefficient generator from DSP, they have 15 digits after the decimal point.
a1 and b1 are exactly the same except they have opposite signs at freq.=20Hz , Q= 0.2 and Fs=18.1 Hz.

In my case thay are not the sime
a1 is different then b1

Quote from: spiner on July 28, 2021, 03:22:48 AM

I used CSVed to import the numbers.
And I have not found what is the proper order, I have used the following list order:
b0=1
b1=2
b2=3
a1=4
a2=5
                                                                                                                                           spiner.

I use copy/paste
copy from excel (whole number, all digits) and paste into audioweaver

and negate a1 and a2

b0=1
b1=2
b2=3
a1= -(4)
a2= -(5)

And you have to first negate numbers, then copy and paste !

Audioweaver will show rounded numbers and you can't edit them ''by hand'', if you do so it will mess thing up...I think ;)

you can check results by right click on block, show graph or something like that...
#4
Hi Spiner

Those are near field measurements of XLS 10 after I apply those setings

My goal is to boost, apply linkwitz transform, at lower end, I manage to do that.

You did read Davids posta about
"The a1 and a2 coefficients need to be negated"

So the result that you get for those coefficients you need to "reverse" them. If thay are positive you should make them negative (-0.xxxxxxxxxxxxxxxxxx)....
If thay are negative you should make them positive ;)

You could write which model of driver/speaker you are useing and maybe I could run that via software ?

sub na blizu.jpg
#5
Hi Spiner
please take a look at this, it mide clear some thing ;)

https://dspconcepts.com/forums/feature-requests-and-bug-reports/198-analog-biquad-filter-and-prewarp-frequency

You have to copy/paste full number from minidsp calculator into audioweaver
once pasted audioweaver ''round'' that number
so it mide look like there is two times b1 but it's a1 in place.

Now, audio weaver does ''calculate'' with 0,454543125454542125454 but it will show 0,45454
If you round that number by your self and anter only 0, + 5 digits you will get false result
so you will have to copy 0,+ all the rest od digits to get right result (just use copy/paste).

hope I explain this right ;)
#6
Thanks Michael ;)

I'm thinking, maybe, to make some 4 way...but...just maybe...will see

Those do sound really, really nice ;)

By the way, I haven't  got any notification on email about your replay...
#7
And here is how I setup Linkwitz transform for Peerless XLS 10

LInkwitz XLS 10.jpg

linkwitz to miniDSP.jpg

linkwitz from miniDSP to audiowever.jpg

audiowever graf after save.jpg
#8
Second set

josip katalinic harm09.jpg

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josip katalinic harm17.jpg
#9
Hi all
this is my system based on rPi3 (volumio) > Analog Precision DSP first generation with ES9028 > hypex NC252MP for peerless XLS10 / hypex NC250MP for Satori 16P / NC100HF for Satori BE

The sound is great !!!

Crossover points are like 100-120Hz LR4 betwin XLS and 16P and 2400Hz LR2 betwin 16P and BE.
There is Linkwitz transform on XLS10 and that's all, just a plain LR4 and 2LR.

And a couple pictures of building process.

josip katalinic harm01.jpg

josip katalinic harm02.jpg

josip katalinic harm03.jpg

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