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Deleted member 148505
Hi, I haven't tested OPA828 yet.Hello Lester.
Thank you for your quick and very detailed response
Regarding the sylph MKII, I noticed that you tested different operational amps: did you test the OPA828 with HD2 dominating ?
For film-type capacitors at the HP output, what justifies the choice of those used ?
Why didn't you use WIMAs (I can't give a precise reference since I don't know the size of the components used)?
Regards.
OPA1656 has an HD3 dominating but I keep coming back to it's sound. My reference TPA3255 amp at home is now using it.
The OPA1656 has better highs and better dynamics (snappier?) compared to others. For example LME49720 also has good highs, but the overall sound is bland for me (specifically for Sylph-D200, might not be applicable for others). NE5532 is the most correct sound (sounds like SS vintage amps) but the mid-highs 3kHz o 7kHz is not as good (rendering the schh vocal sound).
Using WIMAs for the output filter is cost prohibitive so I just used oversized output filter caps for our TPA modules, sound quality should be as good, and using a larger footprint will make it easier to replace with other available caps.
Regards,
Lester
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Deleted member 148505
United Chemi-con KYB is the one currently available. (same as pic on the web store). Thank you
Hello rhing.
It must be compatible.
Its price is not too expensive compared to other power supplies with less function with lower quality components.
It has its 51VDC output which is the maximum allowed by the SYLPH-D200-MKII PCB (so warning), its heat dissipation plate is designed to be fixed on one side of the chassis, the components used seem to be of very good quality and well selected, it has many different auxiliary voltage sockets for various uses -> +12VDC & +3.3VDC and regulated AUX output +-5 VDC ~ +-18 VDC (fan, relay, light, ARDUINO?).
Datasheet can be found here -> https://micro-audio.com/store/wp-content/uploads/2020/12/SMPS630-SO_2412020.pdf
Only this one is not regulated -> can be very annoying if your individual electrical network is constrained by significant voltage variations
Lester would have to confirm its compatibility with the SYLPH-D200-MK II PCB.
Regards.
It must be compatible.
Its price is not too expensive compared to other power supplies with less function with lower quality components.
It has its 51VDC output which is the maximum allowed by the SYLPH-D200-MKII PCB (so warning), its heat dissipation plate is designed to be fixed on one side of the chassis, the components used seem to be of very good quality and well selected, it has many different auxiliary voltage sockets for various uses -> +12VDC & +3.3VDC and regulated AUX output +-5 VDC ~ +-18 VDC (fan, relay, light, ARDUINO?).
Datasheet can be found here -> https://micro-audio.com/store/wp-content/uploads/2020/12/SMPS630-SO_2412020.pdf
Only this one is not regulated -> can be very annoying if your individual electrical network is constrained by significant voltage variations
Lester would have to confirm its compatibility with the SYLPH-D200-MK II PCB.
Regards.
D
Deleted member 148505
Using 51V is ok, In the datasheet, up to 56.5VDC can be used if the speaker load is 6ohms, and the absolute max is 69VDC.Hello rhing.
It must be compatible.
Its price is not too expensive compared to other power supplies with less function with lower quality components.
It has its 51VDC output which is the maximum allowed by the SYLPH-D200-MKII PCB (so warning), its heat dissipation plate is designed to be fixed on one side of the chassis, the components used seem to be of very good quality and well selected, it has many different auxiliary voltage sockets for various uses -> +12VDC & +3.3VDC and regulated AUX output +-5 VDC ~ +-18 VDC (fan, relay, light, ARDUINO?).
Datasheet can be found here -> https://micro-audio.com/store/wp-content/uploads/2020/12/SMPS630-SO_2412020.pdf
Only this one is not regulated -> can be very annoying if your individual electrical network is constrained by significant voltage variations
Lester would have to confirm its compatibility with the SYLPH-D200-MK II PCB.
Regards.
I also placed 1.5KE62A TVS diode in the module for transient / reverse DC protection. If your concern is heat dissipation, use power supplies with 43V-45VDC.
If you have voltage fluctuations in your area, give 10% to 20% voltage allowance (43V to 48V or use an AVR).
I'm using 50V in my personal amp without any problems.
(just ignore the smps that I've used, I converted it from 48V dual supply to 50V single supply)
Hi Lester.
What did you think about this supply (220-240VAC/Single 50VDC/600W) ?
https://fr.aliexpress.com/item/1005...st_main.5.2cac5e5brvLtXV&gatewayAdapt=glo2fra
Here are some pictures from the net ->
Regards.
What did you think about this supply (220-240VAC/Single 50VDC/600W) ?
https://fr.aliexpress.com/item/1005...st_main.5.2cac5e5brvLtXV&gatewayAdapt=glo2fra
Here are some pictures from the net ->
Regards.
Attachments
D
Deleted member 148505
Looks like it has the same implementation as the one that I'm currently using, it's also easier to modify.
For their single supply version in aliexpress, I saw that they are just removing the TO-220 rectifier for the negative side and connecting the output negative trace to ground.
I have checked my green SMPS on the scope and it was significantly noisier than the meanwell's. As for the sound, it's still good and doesn't degrade the Sylph-D to the point that it's noticeable. I will check the FFT of my green smps setup once I have the time to do it. (I tried a cheap meanwell knockoff and it has a spurious noise around 25kHz on the FFT, also felt that it degraded the sound)
Thanks Lester. I purchased the Micro Audio SMPS630-S0 with the Mundorf electrolytic capacitor upgrade. I also purchased the additional capacitor board with Nichicon Gold Tune electrolytic caps. With efficient Class D amps, my experience is that the sound quality starts with the quality of the power supply.
Lastly, I ordered the SYLPH-200-Mk II amp. Looking forward to listening to the combination.
People hi !
I received my PCB 'Sylph D200 MKII'
The work done is simply exceptional and I would like to congratulate LESTER: there is nothing at all to complain about regarding the quality.
It's an 'extra PCB'
I haven't received all the hardware to build my amp yet but I'll post new pictures as soon as it's finished, I promise
In the meantime, here are some pictures ->
I received my PCB 'Sylph D200 MKII'
The work done is simply exceptional and I would like to congratulate LESTER: there is nothing at all to complain about regarding the quality.
It's an 'extra PCB'
I haven't received all the hardware to build my amp yet but I'll post new pictures as soon as it's finished, I promise
In the meantime, here are some pictures ->