hello there head fi!

first of, thankyou to everyone who gave me advise on what headphones to buy, and what amp to put them with. i am now the proud owner of a pair of ultrasone 780's and an ibasso D10. im hoping this setup will last me a good while.

the reason for this thread is to ask advise from anyone with experience of rolling op amps in the D10, or anyone with some knowledge of what each op amp sounds like. it is also to give people some kind of idea on how the amp sounds thought the burn in.
my D10 is currently burning in sat next to me. out of the box it sounded pretty nice, bass has improved over my laptop soundcard by a long way. its very nice and airy, spacious, and the sibilance of the 780's has been nicely brought down a notch or two. its had about 6-7 hours burn in now. I'l try and keep this thread up to date with feelings on the amp as it develops.

ok, now its question time.
im not very good with electronics - to be honest they scare me - i can never tell if im doing something wrong, so im always worried im gonna toast something important. so a few questions. any advise is very welcome.

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now i have no idea what the difference is between the op amps in the amp as stock and the ones in the box that came with it. i also don't understand what the different buffers will do to the sound.
im asking for advise on what op amp + buffer combo out of the ones listed above will match well with the bright and slightly sibilant sound of the 780's.


i don't really want to be buying any more op amps any time soon, so the best out of that bunch would be nice.


thanks a lot.

Just to mention a few things as if you are anything like me you wont know what is what with the op-amps and buffers that were supplied with the d10.

When you open up the d10, you will see 3 chips which are able to be removed and installed (the op amp and buffers) they are in a pyramid/triangle formation. The top single one is the op-amp, the lower two which are side by side are the buffers.

Op-amp's can be used in the buffer position, for some configurations and which op-amps to use as buffers and when to try bypassed buffers consult Jamato's d10 thread, headflight has posted some good combinations to try out (contained in post 1)

There are two bypassed buffers supplied in the op-amp rolling kit. These can be distinguished as they look like bare pcb's without a chip on them.

Take note of the orientation of the op-amp's and buffers. There should be a little square around one of the pins in one corner of each op-amp, either printed on the board, or a square of solder. Take note before you swap out any op amps of the position of this on the installed op-amps and follow this alignment when/if rolling op-amps.

As to tuning the sound to your liking, that really is a case of experimenting and seeing which you enjoy.

Good luck and I hope the info has been useful. I am sure you will get more replies, just thought i'd throw in some basic useful info to be getting on with.

thankyou for that. i havent opened it up yet; im seeing how the stock amps sound after a good burn in before dismantling it.
just to clarify, theres 1 op amp and 2 buffers in the unit? if thats the case, why do i have 2 pairs of op amps in the box and 2 dummies?

thanks.

op amps can be used in the buffer position too. The dummies are for op-amps which have their own buffers built in.

I Think, and I hope someone would correct me if this is not the case, you could use the bypass buffers with any op amp, but you may not gain any benefit either with regards output power or sound quality if the op amp requires buffers.

From what I can gather, it is literally mix and match to find your prefered sound.

One thing I am unsure off, which perhaps someone could verify, is that you shouldn't mix buffers. i.e. 2 seperate buffers running side by side.

from what I gather, the op amp is dual channel, hence the need for only one opamp, and as there are two buffers, that suggests to me that each buffer is for left or right channel, thus it is obviously better two have the two buffers identical.

Like I say this hasn't been verified to me by anyone, but to "my" logic, this would be the case.

http://www.head-fi.org/forums/f105/i...1-71-a-399315/

alot of information about opamaps and the d10 can be found in this link.