It does makes a huge difference in the stability of my digital gear, and all the 'micro' details reappeared in the music, I got back my fun of listening subtleness in music and get all the right tempo, queues, anything like the slightest 1/100 second difference when musicians strike their instruments, everything is back to the way it should be.
I am using a totally non audiophile DAC, its just a EMU0404, I changed the main transformer to EI core passive (original was poor switching which polluted the dac), then I removed all OPAMPS and ALL Filters including the OS filters, I Disconnected the OUTPUTS, and I placed the best capacitors near the DAC chip and replaced some transistors then placed massive capacitors in the POWER supply!!!, before just with the mods through the OPAMP (2) it was very poor sounding , congested, artificial. But I liked the presentation... just hated the poor sound, Then I purchased better DAC with the SAME chip AKM and rolled output opamp with all the best and still the sound sounded plastic and so poor, lacking everything.
Then I placed Broskie output in the EMU0404 straight from the V-OUT and Blam!!! everything so good, now...
The audio filter (Chinese module + Variac) + external additional filter, just brings a huge soundstage, full micro-detail and so much fun!
The filter helped the emu0404 which is old technology to boot properly without lights flashing for 20 minutes.
Then I placed Broskie output in the EMU0404 straight from the V-OUT and Blam!!! everything so good, now...
The audio filter (Chinese module + Variac) + external additional filter, just brings a huge soundstage, full micro-detail and so much fun!
The filter helped the emu0404 which is old technology to boot properly without lights flashing for 20 minutes.
If you have a varistor, you could connect it to the input of the filter between the L and N terminals to protect against overvoltage. At the output, you could also connect a large X2 capacitor (2.2uF - 4.7uF) between the L and N terminals to achieve a lower cutoff frequency.
I have a 1uf X2 somewhere !, Franz you use AI translate? I try to learn germanische ! What a great mind to place the verb at the end of phrases haha.
Yes, I'm German. We write like that, and many people have despaired over our grammar. I'm translating with Google Translate.
The 1uF X2 capacitor is good, try it. The filter you're using has very small X2 capacitors compared to the coils. With 1uF, you lower the cutoff frequency a bit. You can do that easily.
The 1uF X2 capacitor is good, try it. The filter you're using has very small X2 capacitors compared to the coils. With 1uF, you lower the cutoff frequency a bit. You can do that easily.
A simple ferrite filter can generate hysteresis noise/distortion and cause some problems. IOW, its not really so simple. You might look at spectral line noise skirt widths with a very hi-res FFT, and or noise floor level, with and without the ferrites.
Also, ferrites can cause other problems at high frequencies. For some history please see the attachment at: https://www.diyaudio.com/community/threads/general-purpose-dac-clock-board.413001/post-7765137
Anyway, the loss of dynamics you perceive may be loss of low level details due to intermodulation of the audio signal with ferrite-produced EMI/RFI noise. That would create noise sidebands around the audio signal, which become part of the audio signal. Point is, if you hear something real and don't see an explanation in standard measurements then maybe you need to look deeper.
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I perceived zero losses of dynamics
These are my diy 20 years ago speakers
My other regular speakers are harbeths, I used to ave REL sub to complement them
These are my diy 20 years ago speakers
My other regular speakers are harbeths, I used to ave REL sub to complement them
F-Typ for common mode chokes.
https://www.mouser.de/new/vacuumschmelze/vac-VITROPERM-chokes/
https://www.mouser.de/ProductDetail/Vacuumschmelze/T60405-R6123-X232?qs=sGAEpiMZZMtyFaoUegSfpuSbysziqcJNnU3torIyGlc=
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Yes! I usually listen with the dac or the phono stage, you cannot see the big boxes they are on a metal furniture behind, where the turn table is, its a 2 m long table, I have better listening rooms, but this is where I place it to enjoy. I use the computer a lot for youtube streaming, I have a laptop too that I use.
I have another filter after the transformer variac for the DAC and PHONO, so : chinese filter ---> Variac --- amps ----> Filter #2
You cannot see in the picture I have two mono solid state amps (top of line stuff, crazy good to play Mass in C minor of Mozart the most difficult passages, Kt427 , Sanctus, Hosanna,
please ban this video, this is the most horrible sound ever on youtube) (same thing with Gardiner, it is so horrible, I prefer the high distorted sound of Frensiz) Give me this (more compressed) any time:
) which I use, they are clearly more transparent than my basic tube amp, in the future I will build kt120 mono's all regulated and it will power a 3 way all Scan-speak, just need to build it.
I have another filter after the transformer variac for the DAC and PHONO, so : chinese filter ---> Variac --- amps ----> Filter #2
You cannot see in the picture I have two mono solid state amps (top of line stuff, crazy good to play Mass in C minor of Mozart the most difficult passages, Kt427 , Sanctus, Hosanna,
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Mozart is very good to listen to, I heard Haydn's Salve Regina yesterday, you can hear a lot, especially in the alternation between quiet organ passages and loud choral songs
I checked my system at 100db blasted out some good music, the voltage on the Variac (13.5A) didn't flich a bit.
Any loss of dynamics is 'psychological' their system must sound bad from the start.
Any loss of dynamics is 'psychological' their system must sound bad from the start.
Not every system is exposed to the same EMI. A filter that works okay in one system might not be the best choice for another system?
The main transformer must be in pairs with the current diodes a dn capacitor to make a perfect supply at 5 hz without drop in power
The amp should go to 0 to full clipping power with the powers supply not dropping more than a few mvolts
Usually this is achieved with full wave + 350va per channel with 250 us for tube or 25000uf for state, regulators and choke to also help minimize any loss of dynamics from the mains
The amp should go to 0 to full clipping power with the powers supply not dropping more than a few mvolts
Usually this is achieved with full wave + 350va per channel with 250 us for tube or 25000uf for state, regulators and choke to also help minimize any loss of dynamics from the mains
My cathedral Casavan ! I enjoyed hundred of concerts, from requiems (G faure etc to Bach)
I know personally everyone and I am very proud of their talent and grateful.
If you have a good sound system hear that bass man!!!
Turn the volume to MAX
I know personally everyone and I am very proud of their talent and grateful.
If you have a good sound system hear that bass man!!!
Turn the volume to MAX
Actually I still have a huge EMI problem
The wires from the DAC catch EMI in the air. It is a bit my fault I had 2 wall wart switching but not active nearby and I have a huge Cast Iron table for my gears which is the worst , the glass is plastic on top.
So I disconnected the Wall adapters and still
I am thinking about in stalling the EMI filter in the electrical panel just for that circuit.
But first my wires from the dac to the amps is 3 meters long.
The problem is WHEN THE DAC IS OFF, it picks up lot of noise!!!
The wires from the DAC catch EMI in the air. It is a bit my fault I had 2 wall wart switching but not active nearby and I have a huge Cast Iron table for my gears which is the worst , the glass is plastic on top.
So I disconnected the Wall adapters and still
I am thinking about in stalling the EMI filter in the electrical panel just for that circuit.
But first my wires from the dac to the amps is 3 meters long.
The problem is WHEN THE DAC IS OFF, it picks up lot of noise!!!