[dazzer1975]

Quote:

Originally Posted by jamato8 /img/forum/go_quote.gif I did notice that the surfaces of the optical cable that would have had the normal cable plugged into them, had small scratches so I buffed them off with the special micron polishing wet and dry used for this purpose and got them back to a mirror finish.

Did you scratch the surface while performing this mod or was the scratch already there?

 

[HiFlight]

Quote:

Originally Posted by smallcaps /img/forum/go_quote.gif question: has anyone tried the LME49720HA / LM4562HA opamp in the d10? does it work? cheers edit: also curious about the Burson Audio discrete opamps. thanks

The LME49720/LM4562 do not work in the D10. Not sure about the discrete opamps, but there is not much working space in the D10.

 

[jamato8]

Quote:

Originally Posted by dazzer1975 /img/forum/go_quote.gif Did you scratch the surface while performing this mod or was the scratch already there?

They were already there. The work, if you are in the right distance, will not touch the end of the internal optical cable. They weren't bad but I could see them with my 10X loop. I was glad I could polish them up so that they meet with very good surfaces.

 

[dazzer1975]

Thanks for that Jamato, good info. Is a tad worrying though if the connectors come pre-scratched.

Worth looking out for that.

 

[clasam]

Quote:

Originally Posted by HiFlight /img/forum/go_quote.gif The LME49720/LM4562 do not work in the D10. Not sure about the discrete opamps, but there is not much working space in the D10.

Yeah, I just checked the LM4562, and got big time clipping...I must have been thinking about a different opamp that works fine; I didn't write down any notes at that time, so I can't be sure what it is...my bad.

On another note, the LM6172 doesn't work either. Now THAT, I wrote down.

 

[clasam]

Quote:

Originally Posted by clasam /img/forum/go_quote.gif Trying the THS4032 & lmh6643 now. Very transparent, neutral, quick, punchy and balanced

I ended up not liking this combo as much when I did more extensive listening. It didn't have the tight bass or sweet high end of the LTC6241HV/LMH6643 combo.

So I'm back to another of my favorites, the AD8599/AD8656 buffers

 

[HeadphoneAddict]

Quote:

Originally Posted by clasam /img/forum/go_quote.gif I ended up not liking this combo as much when I did more extensive listening. It didn't have the tight bass or sweet high end of the LTC6241HV/LMH6643 combo. So I'm back to another of my favorites, the AD8599/AD8656 buffers

I only liked the AD8599/AD8656 combo with my Senn IE8 and HD600 or Edition 9.

 

[HiFlight]

It has been my experience that the THS4032 sounds best with bypassed buffers, regardless of which amp I have used it in.

Quote:

Originally Posted by clasam /img/forum/go_quote.gif I ended up not liking this combo as much when I did more extensive listening. It didn't have the tight bass or sweet high end of the LTC6241HV/LMH6643 combo. So I'm back to another of my favorites, the AD8599/AD8656 buffers

 

[dazzer1975]

why for sale?

whats the story?

 

[HeadphoneAddict]

Quote:

Originally Posted by HiFlight /img/forum/go_quote.gif It has been my experience that the THS4032 sounds best with bypassed buffers, regardless of which amp I have used it in.

I think the AD8656 is another one that sounds best with bypassed buffers.

Quote:

Originally Posted by Horse /img/forum/go_quote.gif I loved the OPA2350 when I tried it inside a DAC. It's a fantastic opamp for voltages up to 6V.

That one works well with the AD8616 as buffers.

 

[HiFlight]

Quote:

Originally Posted by HeadphoneAddict /img/forum/go_quote.gif I think the AD8656 is another one that sounds best with bypassed buffers. That one works well with the AD8616 as buffers.

I agree both of Larry's observations; different opamps prefer different buffers, or none at all.

 

[HiFlight]

Quote:

Originally Posted by Horse /img/forum/go_quote.gif But what is the supply voltage of the opamp and buffers inside the D10? I remember that the THS4032 clipped on musical peaks inside my DAC with a 9V supply voltage. I had to increase it to 12V.

It's not so much the opamp, but rather the supply voltage of the amp. If you input a higher signal voltage than is able to be supplied by the amps power supply, it will clip. If an opamp can swing rail-to-rail, it will be able to use all of the input voltage applied to it, up to the supply voltage before clipping occurs. Not all opamps are able to do that. Momentary transients can easily exceed the supply voltage and the amplifiers headroom capability, even if the average listening level is not at the clipping level.

If clipping occurs in the D10, try reducing the input signal a bit to eliminate the clipping, then select high gain. That will get you another 3 db of gain.

Clearly, the THS4032, as well as many other opamps will clip earlier at a supply voltage of 5v than they will at higher voltages.

 

[qusp]

jamato: you didnt happen to take note of how far in you made the cut did you?? or did you just measure where it would be if you joinde them together whilke the iriver and D10 are mated??

 

[jamato8]

I just lined them up and used a pencil to mark one side of each right angle adapter and then cut away. Once made there isn't much that will go wrong with these. They are strong, close to the back side of the D10 and iriver and it works great. I used super glue and they are aligned very well. I used a file to finish the ends of each adapter.

 

[qusp]

so you cut at basically the same part of both?? so you removed the same amount of material from each or more from the mini side??

so the micron wet and dry isnt needed to remove any burs?? or you think that was unusual that you needed to polish them. I thought the cable sysconcept used was already polished.

thanks again; sounds fairly easy and the parts are cheap enough. what did you use for the cut?? i'm not sure I have anything suitably small; I suppose I could just use a stanley knife. or a full size hacksaw LOL. I dont have any cutting attachments on my dremel as yet.