DSP Xover project (part 2)

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xlr-board, crlc board

Somebody want to buy my xlr-out boards and crlc-board for najda, since I dont get to use after going passive. Never used, not testet. Picture is the user I bought the pcb's from. Can sent photo pm.
I have smps never used a well.

357577d1372691530-dsp-xover-project-part-2-gc-sym-outboard-top.jpg
 
Highend Najda

Hi,
If somebody is interested in a complete finished Najda with:
1. All ultra linear power supplies from Sjöström ( -+ 12V, 5V)
2. Linear PS for Exa U2I USB-I2S Converter
3. Linear PS for JLSounds USB-I2S Converter with isolation and clock Board with Crystek ultra Löw Phase Noise Oscillator
4. The 2 USB converters can be switched from one to another from the rear
5. Big Oled front Display
6. Amanero USB-I2S is also installed, can be used instead of JLSounds converter
7. Apple remote controller

For those interested send me a PM and I will provide photos from inside and outside.
Best regards
Sigi
 
Highend Najda

Hi,
If somebody is interested in a complete finished Najda with:
1. All ultra linear power supplies from Sjöström ( -+ 12V, 5V)
2. Linear PS for Exa U2I USB-I2S Converter
3. Linear PS for JLSounds USB-I2S Converter with isolation and clock Board with Crystek ultra Löw Phase Noise Oscillator
4. The 2 USB converters can be switched from one to another from the rear
5. Big Oled front Display
6. Amanero USB-I2S is also installed, can be used instead of JLSounds converter
7. Apple remote controller

For those interested send me a PM and I will provide photos from inside and outside.
Best regards
Sigi
 
Hi,
If somebody is interested in a complete finished Najda with:
1. All ultra linear power supplies from Sjöström ( -+ 12V, 5V)
2. Linear PS for Exa U2I USB-I2S Converter
3. Linear PS for JLSounds USB-I2S Converter with isolation and clock Board with Crystek ultra Löw Phase Noise Oscillator
4. The 2 USB converters can be switched from one to another from the rear
5. Big Oled front Display
6. Amanero USB-I2S is also installed, can be used instead of JLSounds converter
7. Apple remote controller

For those interested send me a PM and I will provide photos from inside and outside.
Best regards
Sigi
I forgot to mention that the electrolytic caps were replaced by MKPs and 3 OPAMPs by BURSONs based on FET and Transistor amplifiers!
 
Hi,
If somebody is interested in a complete finished Najda with:
1. All ultra linear power supplies from Sjöström ( -+ 12V, 5V)
2. Linear PS for Exa U2I USB-I2S Converter
3. Linear PS for JLSounds USB-I2S Converter with isolation and clock Board with Crystek ultra Löw Phase Noise Oscillator
4. The 2 USB converters can be switched from one to another from the rear
5. Big Oled front Display
6. Amanero USB-I2S is also installed, can be used instead of JLSounds converter
7. Apple remote controller

For those interested send me a PM and I will provide photos from inside and outside.
Best regards
Sigi
I forgot to mention that the electrolytic caps were replaced by MKPs and 3 OPAMPs by BURSONs based on FET and Transistor amplifiers!
 
Hi Dieter,

You have to do: Nothing, because the Najda switches off and on automatically. I always use the hard power-switch of my preamp, it works perfect. Najda stores the last setup, volume, settings etc. And if you want to change your setup, you make the new settings and then press the standby-switch (off) and press it a few seconds later again (on), so the new datas are stored. Then you can switch off the power again.

Best regards, Rainer
 
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Something else, Dieter:

You should always use only FIR filters, the steeper the better! I use LR with 72 db, the dynamics are stunning! With IIR it sounds only lame.
I made the linear-crossover-filters with RePhase, without any magnitude- or phase correction. The correction I made then in the input, that is the best way to the perfect speakers.

LG, Rainer
 
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Yes i know. In the past, my last three speaker-projects, FIR was no problem. But in the moment i need to much filters for my new open baffle speaker build. So i got an overload with FIR. But I´m working to reduce the filters an can work with FIR filtering.
 
Hello everyone,

I use 2 Najda, one for the left lane, the other for the right lane, (yes it's possible) each Manages 4 FIR with:
Graves 1 FIR 1023samples at 96KHz
Low Medium 1FIR 512samples at 96KHz
Medium 1FIR 512samples at 96KHz
Treble 1FIR 512samples at 96KHz

On each Najda processors are used to the maximum to the environment 80%, car sampling set at 96Khz, it is significantly more musical at 48Khz, on my high performance pavillon system.

With a single time Najda did not have enough resources in samples to create the FIR filters I wanted, so I searched the solutions to make it work two. (Analog input and I2S with USB / I2S Hecate XMOS armature)

FIR filters are created with Rephase in Linkwitz-Riley.

I do not go into the details of the assembly of the 2 Najda, but there are precautions to be taken, such as using a common clock, but it's very stable. (I use for more than one)

Welcome,
Jean Louis