I have been a lurker on this forum with some interest because I have an SI modified with some standard changes. These include Panny HFC supply cap, poly input caps, new toroid and poly output filter parts. I also use a 12V car emergency jump start box for power. This is significantly easier and has a larger capacity compared to some SLA implementations. Not necessarily pretty though. This is all in a radio shack metal case.
These tweaks made a difference, but are not particularly noteworthy on this forum. What I have done that has not been posted here is use Stillpoint ERS RFI absorbing sheets. This can make an astonishing improvement in dynamics and apparent naturalness. I first tried placing an 8.5" x 11" sheet to the top of the amp and noticed an improvement. Considering Stillpoint's warning that you can go too far by using to much, I tried a 1" x1" square inside the top cover over the Tripath chip and another same sized square on the inside back of my amp where power, RCA, and output jacks are. This is much better than the full sheet. Adding one more square to the front started to decrease dynamics.
Anyway, I hope many of you can try this on your digital amps. The ERS sheet would seem to be a natural for these products given the high RFI environment and it is only $20.
These tweaks made a difference, but are not particularly noteworthy on this forum. What I have done that has not been posted here is use Stillpoint ERS RFI absorbing sheets. This can make an astonishing improvement in dynamics and apparent naturalness. I first tried placing an 8.5" x 11" sheet to the top of the amp and noticed an improvement. Considering Stillpoint's warning that you can go too far by using to much, I tried a 1" x1" square inside the top cover over the Tripath chip and another same sized square on the inside back of my amp where power, RCA, and output jacks are. This is much better than the full sheet. Adding one more square to the front started to decrease dynamics.
Anyway, I hope many of you can try this on your digital amps. The ERS sheet would seem to be a natural for these products given the high RFI environment and it is only $20.
sorry to butt in, but how did you implement the polyprop cap at the output stage? What value did you use? Where did you attach it? Thanks.
DOHbert,
I implemeted the output filter off the SI board due to space considerations. Values were per Tripath datasheet.
As, far as the Farnell part, I am not sure if has the same function as the ERS sheet. Maybe some EE type can comment. One thing though, is that there might not be a non USA retailer. Stillpoint indicated that it could be export controlled.
I implemeted the output filter off the SI board due to space considerations. Values were per Tripath datasheet.
As, far as the Farnell part, I am not sure if has the same function as the ERS sheet. Maybe some EE type can comment. One thing though, is that there might not be a non USA retailer. Stillpoint indicated that it could be export controlled.
But what about the other properties? Does it work in the same way as the Stillpoint material?
If it does, it shouldn't be too hard to find another 24 peeps to try it out at around 1 UKP per head! 😉
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