The best price-quality is to use a bigger Aluminum oil ( say 4.7uF ) and shunt it with a 0.01uF silver-gold-oil.
I recently used that technique with a 4,7u Alu oil shunted with a 0.012uF K71 (ussr styroflex) with outstanding results 🙂
Thanks for the information guys.
About resistors for Xovers I use Caddock MP820/821 for tweeter & Mills for midrange & woofers.
I use Mundorf Supreme, Ohmite Audio Gold or Welvyn W22.
I certainly like wirewound and would not use a matalfilm or MOX resistor in speakers.
For me they sound kind of sharp.
I certainly like wirewound and would not use a matalfilm or MOX resistor in speakers.
For me they sound kind of sharp.
ok, I played a little bit with supply and had interesting report that I can share here with everybody.
Like I mentioned already cheap/standard quality Lead acid battery vs. Premium Cyclon.
This doesn't stand a chance. The premium battery has more speed and transparency.
Peace is just more involving and extremes of band are more powerful and extended, but yet there is more body to the sound.
Replace battery with Audio transformer and Blackgates fitlering, produce an interesting sound.
It feels like there is bit more 3D but sound sound doesn't have same power, lacks of body, precision and colors compared to the premium battery so I decided to turn this solution down.
Then I proceeded to take the shunt off and replace it with simple series regulator MOSFET and Zeners for reference.
With this arrangement I need to connect PSU ground while in the other 2 situations Ground was floating.
Sound changed significantly. Sounds feels more natural and body has come back, so sound is colorful again. Nevertheless I feel that the sound is less sophisticated compared to battery also seems not to have same transparency, crispness.
In the other hand, this arrangement is using low amount of capacitance and this might not be enough to knock noise down.
Perhaps, if I can manage to get the slight buzz off, I can get transparency back although I find it unlikely as it sounds more a difference due to the topology rather than disturbance induction.
In conculsion I felt that shunt works best with batteries and it's a mean to provide verly low impedance and clean supply to the circuit under test.
However, series regulation with its simplicity seems to posses a more natural sound but it lacks of sophistication.
It feels like series regulator has potential to be the most suitable for audio and seems to have the possibility to get the best sound.
If it could have a tad more refirement there would be no question who the winner of this round was.
I wonder how the tube with CLC filtering and series regulator might sound compared to the all above.
For this round I have to elect the cyclon with the Shunt the winner.
Like I mentioned already cheap/standard quality Lead acid battery vs. Premium Cyclon.
This doesn't stand a chance. The premium battery has more speed and transparency.
Peace is just more involving and extremes of band are more powerful and extended, but yet there is more body to the sound.
Replace battery with Audio transformer and Blackgates fitlering, produce an interesting sound.
It feels like there is bit more 3D but sound sound doesn't have same power, lacks of body, precision and colors compared to the premium battery so I decided to turn this solution down.
Then I proceeded to take the shunt off and replace it with simple series regulator MOSFET and Zeners for reference.
With this arrangement I need to connect PSU ground while in the other 2 situations Ground was floating.
Sound changed significantly. Sounds feels more natural and body has come back, so sound is colorful again. Nevertheless I feel that the sound is less sophisticated compared to battery also seems not to have same transparency, crispness.
In the other hand, this arrangement is using low amount of capacitance and this might not be enough to knock noise down.
Perhaps, if I can manage to get the slight buzz off, I can get transparency back although I find it unlikely as it sounds more a difference due to the topology rather than disturbance induction.
In conculsion I felt that shunt works best with batteries and it's a mean to provide verly low impedance and clean supply to the circuit under test.
However, series regulation with its simplicity seems to posses a more natural sound but it lacks of sophistication.
It feels like series regulator has potential to be the most suitable for audio and seems to have the possibility to get the best sound.
If it could have a tad more refirement there would be no question who the winner of this round was.
I wonder how the tube with CLC filtering and series regulator might sound compared to the all above.
For this round I have to elect the cyclon with the Shunt the winner.
Very interesting.
Yes, since i heard the tube supply i am convinced the PSU makes a big difference.
Of cause, everybody is saying so but it is more dramatic then i thought.
Yes, since i heard the tube supply i am convinced the PSU makes a big difference.
Of cause, everybody is saying so but it is more dramatic then i thought.
As far as I can see from the pictures Andrej's supply has tube rectifiers followed by a LC-filter (no CLC!) and paralleled zeners. This is still a (passive) shunt design!
Yes the PSU is the big difference & the great trick to have very good sound, I powered the Master pre-pre with 12V batteries vs Erno Borbely series regulator, result the same when compared for digital better Borbely stuff
So you liked the Borbely better ?
Could you post a schematic ?
Did the batteries and the Borbely remove the remaining noise issue ?
As far as i can tell, Andrejs PSU uses a zener and two pass transistors at the output.
Could you post a schematic ?
Did the batteries and the Borbely remove the remaining noise issue ?
As far as i can tell, Andrejs PSU uses a zener and two pass transistors at the output.
I could imagine that it is something like this but with stronger transistors :
Simple Voltage Regulators Part 2: Output Impedance
Simple Voltage Regulators Part 2: Output Impedance
Where are the transistors? I only can see zeners on L-shaped heatsinks. If there were series-transistors, cooling of zeners makes no sense.
Just to throw some fule on the fire, I was quite taken back at how significant a change i h heard when switching from Nichicon KG to Siemens Sikorels as a prereg to the shunt PSU in my phono. I think at these low levels, subtel changes can make a big difference.
I would say no. SS shunts cab be made with output impedance in the mOhms up to high frequencies.
I think the answer lies more in the distortion spectrum at the output.
At least the guys that made the PSU test in Linear Audio found that out.
The PSUs that did best subjectively had the most benign output spectrum.
I think the answer lies more in the distortion spectrum at the output.
At least the guys that made the PSU test in Linear Audio found that out.
The PSUs that did best subjectively had the most benign output spectrum.
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