[ROBSCIX]

I doubt you would notice a major increase or decrease in sound quality using say 32ohm cans over 300 ohm cans using the same source. Atleast I have never heard it talked about as if it is a topic of concern.

 

[ManuLM]

Quote:

Originally Posted by KingFiercer /img/forum/go_quote.gif Anybody help - which adapter should I use to connect 2 single-DIP chips? Where can I get one?

Are you looking for this:
Single-to-dual Op-AMP Adapter - DIP version (p/n 021001)

 

[KingFiercer]

Thanks ManuLM, this is it. =)
dikvertin, спасибо, у него на 25 баксов и наберу, наверно...

 

[ROBSCIX]

That adapter will work for the buffer on the STX but you cannot use it for I/V as the adapter is too large. There are ways to use OPA627's for I/V though.

 

[wali]

Quote:

Originally Posted by kumaiti /img/forum/go_quote.gif For the STX users still following the thread: Did you try any high-impedance headphones? Did you notice any improvement when using them? The guy from xbit-labs mentioned by the end of his review that he expected the sound to be better with a higher-impedance headphone, but didn't test it. Say you have a 32ohm headphone, would it be worth to increase the impedance using a mod like this: http://www.head-fi.org/forums/f6/mak...r-cable-28100/

Which headphone you're using? I ask that because if you know its maximum power input number you can use the 64-300ohms setting... With a load of 32ohms the 64-300ohms setting of STX outputs ~390mw. if the maximum power input of your headphone is above that number you can try it.

But, its your call.

 

[kumaiti]

Quote:

Which headphone you're using?

Nothing really worth mentioning yet. I am undecided between getting an ATH AD900, ATH AD700 or an AKG K601, the latter having a much much higher impedance than the first two.

That is why I am curious about the practical sound improvement with a high-impedance headphone.

 

[wali]

Get the AKG701 instead if you already have a STX/ST, or either HD580/HD600/HD650.

 

[ManuLM]

I have not managed to find good OA for the K701. So far all I heard was too harsh for the K701. I also believe not feeding enough current to get a good bass base, my take on this is this is a hard limitation from the headamp I/C (TPA6120A2).
What I/V do you have in mind for the K701?

BTW Robscix, any investigations/attempts so far to change the TPA6120A2 ? Or is my analysis wrong on current limitation?

Edit: from TPA6120A2 datasheet, my analysis seems wrong (output current 700mA max... ). But then why such a result on K701?

 

[Zac.R]

Hi Guys - as you can see I'm new to Head-Fi. I have been reading the forum for a while and decided to join.

I know that this has almost certainly been discussed in the past, but as I am at work, I don't have a lot of time to search the forum, so I will ask here, if someone could give me some input that would be great...

I currently run my HD 650's through the Xonar STX - I use the 300 - 600db setting. With this setting I only need my volume control set at low values for the listening volume to be very loud (15 - 20%). My question is - should I drop my setting down to the 64 - 300db - am I doing any damage to my 650's as they are obviously 300ohm cans.

Thanks.

Edit: obvioulsy it should be ohm where I have put db - getting my gains and impedences mixed up

 

[ManuLM]

no damage to expect... your hd650 will be safe in both cases

do what your ears tells you, and use the gain setting that sounds best to your ears

 

[KingFiercer]

Turn back 4562 into buffer (with 49720NA in I/V) and listen to it all night.
Several times compared with HP-out, and the first Line-out sounds really better...
More transperent, better sense of space, details can be heard even better.
Music sounds a bit "lighter", soundstage wider - sometimes sounds come from afar. The most easy and pleasant combination, which I heard. Excellent for listening quiet music.

So 4562 should not be discounted. =) Really interesting sound.

 

[Zac.R]

Quote:

Originally Posted by ManuLM /img/forum/go_quote.gif no damage to expect... your hd650 will be safe in both cases do what your ears tells you, and use the gain setting that sounds best to your ears

Well the highest gain setting sounds better to me. Like the 650s are being pushed to where they should be. It's damage to the driver that I am unable to detect that I am worried about. They certainly don't distort no matter how loud I put them though... :-D

Btw, I have only had my 650's and STX for 3 weeks, so I am in love and in my honeymoon phase :-D

 

[ROBSCIX]

Quote:

Originally Posted by KingFiercer /img/forum/go_quote.gif Turn back 4562 into buffer (with 49720NA in I/V) and listen to it all night. Several times compared with HP-out, and the first Line-out sounds really better... More transperent, better sense of space, details can be heard even better. Music sounds a bit "lighter", soundstage wider - sometimes sounds come from afar. The most easy and pleasant combination, which I heard. Excellent for listening quiet music. So 4562 should not be discounted. =) Really interesting sound.

Many have taken the LME4562NA idea and went further up the ladder to the Dual LME49710HA module. Dual metal cans and just about the top of that opamp family. I always prefered the line out on the STX/ST....the measurments for the line out are somewhat better also.

 

[kumaiti]

Quote:

Originally Posted by wali /img/forum/go_quote.gif Get the AKG701 instead if you already have a STX/ST, or either HD580/HD600/HD650.

They are all way above my budget. The AD900 and K601 are already a stretch themselves.


Also, from what I gather about the Senns, I won't like their sound.

 

[[OverDrive]]

@ManuLM:

Hi dispiace per il mio inglese, ma italiana I'am.

È possibile utilizzare per 701 thi OPamp in I / V:

OPA2137P
OPA2132P/PA
OPA2277P/PA