[dextersventures]

I ordered two opa627ap to put into my asus xonar stx card for my headphone listening. When I put them into the card, the headphone volume is so very low and it distorts a little. I only bought two of them, one for each slot for the headphones. I have no clue what is wrong, I installed them correctly. I heard somewhere, somebody said that these are only single channel and that I need an adaptor or something. Im not sure. So does that mean I need to buy some adaptors and two more. Im so confused, all help will be greatly be appreciated.

 

[leeperry]

be glad you didn't kill your card! yes, you do need adapters: Single-to-dual Op-AMP Adapter - DIP version

but these won't fit on the STX as I/V, there isn't enough room between the 2 DIP8 sockets.

you can still buy one adapter, and put your two OPA627AP as final buffer...it will only be effective on the line-out, though.

to use as I/V, you'd need 4 OPA627AU and 2 of this: Single-to-dual Op-Amp Adapter (p/n 020302)

 

[ROBSCIX]

Quote:

Originally Posted by dextersventures /img/forum/go_quote.gif I ordered two opa627ap to put into my asus xonar stx card for my headphone listening. When I put them into the card, the headphone volume is so very low and it distorts a little. I only bought two of them, one for each slot for the headphones. I have no clue what is wrong, I installed them correctly. I heard somewhere, somebody said that these are only single channel and that I need an adaptor or something. Im not sure. So does that mean I need to buy some adaptors and two more. Im so confused, all help will be greatly be appreciated.

Those units are singal channel. The I/V and buffer section of the STX require dual channel modules. You will need to get some adapters to use them properly for these circuit positions. The OPA627 work great for I/V on the STX, I used them for awhile on this card the trouble is you need to use the SOIC version on adapters for I/V.
Such as these:


They have one chip on the top and one on the bottom. 1 chip for each channel.
I have seen peopel use the DIP 8 version on the I/V using customs adapters or extension cables but this setup is definately not optimal.
Hope that helps.