You seem to be able to make a simple yet effective circuit here too with these devices. Looks just like what I want.
It certainly doesn't sound too smooth to me. I'm still a bit annoyed by the highs. I just hope there aren't any bad contacts (touching the components doesn't reveal a loose contact though).
What would happen to the sound if one of the filter components I changed were badly connected? (C605/606, R605/606/611/612). Would there be no sound or would it be more subtle?
Thanks for the help! Actually I'm glad I already got this far with this player. I'll just leave it like this for a couple months and then we'll see 🙂
If there would be a really bad connection, the sound would probably be intermittent. What kind of opamps are you listening to at the moment?
Ray
Everything is working fine so far, the only thing I noticed is a small mis-alignment of C8' but that's only cosmetic. D@mn, I thought I had it perfect! 😀
Now I'm listening to a pair of OPA2132. I know those a bit brighter. Perhaps the LM4562 would be better suited for me?
Other opamps can only solve part of the problem, but LM4562 a.k.a. LME49720 sound much better IMHO. Also consider AD8620, AD826 or AD827.
Ray
Ray
Here's the schematic and partslist of the new DOS board. I hope I didn't miss anything, otherwise please let me know.
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Oh my, a red led now? I don't want to upgrade my CFP DOS once again Ray 😉
Good to see better is always in sight! Bravo Ray!
Thanks Matthieu! The current sink is different indeed. The main reason for changing it is that it's more compact 🙂. I expect the performance will be the same as the previous one, so don't worry!
Ray
Ray
The boards look good Ray, you did a thorough job !
Can it work on 15V and when can I order the cfpdos ?
Can it work on 15V and when can I order the cfpdos ?
I'm leaving my CD53 the way it is for the next few months. The mods I've done involved the PSU, output, DAC filter and opamps nothing else. I've made a short .wav recording of Stevie Wonder's Sir Duke to show how it sounds:
https://rapidshare.com/files/252319741/CD53.wav
Feel free to share your opinion. I think it sounds pretty good, but there's always room for improvement.
There's some noise in the recording, but my mixing desk is to blame for that.
https://rapidshare.com/files/252319741/CD53.wav
Feel free to share your opinion. I think it sounds pretty good, but there's always room for improvement.
There's some noise in the recording, but my mixing desk is to blame for that.
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Hey Stabby,
I'm fully prepared for the possibility that I may have missed the point of what you're trying to do here, and I hope you don't mind me saying this - I absolutely do not want to come across as rude or unappreciative of you taking the time to share the fruits of your labour - but I don't think there's really any way for anyone to get an impression of how good your CD53 sounds from a WAV file.
Even if we ignore for a moment the degradation of the analogue signal caused by whatever cables, mixing desk and other equipment that you used to record this (a computer, perhaps?) - and even ignoring any loss caused by the analogue-to-digital conversion - the bottom line is that the highest fidelity method of playing this file that I personally have at my disposal would be to downsample it back to 16-bit 44.1khz, burn it onto a CD-R and play it on my own CD63 🙂
I guess this is why audiophiles spend so much time writing about the sound of their equipment. Anyway, I'm glad you're happy with the sound and I wish there was actually a way to share the sound of everybody's players over the web. I'd love to hear a highly modded player in person.
Cheers,
Ben
I'm fully prepared for the possibility that I may have missed the point of what you're trying to do here, and I hope you don't mind me saying this - I absolutely do not want to come across as rude or unappreciative of you taking the time to share the fruits of your labour - but I don't think there's really any way for anyone to get an impression of how good your CD53 sounds from a WAV file.
Even if we ignore for a moment the degradation of the analogue signal caused by whatever cables, mixing desk and other equipment that you used to record this (a computer, perhaps?) - and even ignoring any loss caused by the analogue-to-digital conversion - the bottom line is that the highest fidelity method of playing this file that I personally have at my disposal would be to downsample it back to 16-bit 44.1khz, burn it onto a CD-R and play it on my own CD63 🙂
I guess this is why audiophiles spend so much time writing about the sound of their equipment. Anyway, I'm glad you're happy with the sound and I wish there was actually a way to share the sound of everybody's players over the web. I'd love to hear a highly modded player in person.
Cheers,
Ben
Brilliant
The boards look good Ray, you did a thorough job !
Can it work on 15V and when can I order the cfpdos ?
Thanks everyone!
Erik, the boards have on-board 12V regulators, so minimum input voltage is +/-15V.
I just updated my DOS-CFP page with the latest schematic and partslist PDF.
Boards are ready to ship now, so if anyone's interested, just send me an e-mail to:
Attachments
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Actually I was hoping if someone could hear if my player sounds too bright. Shouldn't that be hearable in the recording? I think my ears might just be more sensitive to high frequencies.
I understand what you're saying though, not at all offended 🙂