[stoutblock]

With my limited supply of opamps the combination that sounds the best so far is LME49720NA in the I/V spots and LT1057ACN8 in the buffer.

Want to try the LME49720HA in the I/V spots but need to pick up an adapter.

 

[leeperry]

try AD797B, they are WELL worth the money...a far cry from the LME parts IMO.

 

[ROBSCIX]

Quote:

Originally Posted by stoutblock /img/forum/go_quote.gif With my limited supply of opamps the combination that sounds the best so far is LME49720NA in the I/V spots and LT1057ACN8 in the buffer. Want to try the LME49720HA in the I/V spots but need to pick up an adapter.

I cleaned out my inbox. I get many PM's.

 

[applegd]

The Molex 4 pin power connector supplies +12, GND and +5V. Anyone knows whether the STX/ST circuit board use +12V only?

I had a quick look at my ST card couple days ago, I saw Linear regulator 7812 and 7805 on the circuit board.

 

[leeperry]

the DSP most likely needs 5V, check its datasheet

 

[ROBSCIX]

Quote:

Originally Posted by applegd /img/forum/go_quote.gif The Molex 4 pin power connector supplies +12, GND and +5V. Anyone knows whether the STX/ST circuit board use +12V only? I had a quick look at my ST card couple days ago, I saw Linear regulator 7812 and 7805 on the circuit board.

The amplifier section on this card swings form -12 to positive +12. Both cards have an negative supply circuit that gives the -12 Volts.
Only logic signals are taken from the slot.

Hope that helps.

 

[Criswell]

Just got my soundcard in today! I take lunch in about 40 minutes for a quick install/test. Also just ordered 5 of the LME49720 DIP8! If I don't think I like the sound of the stock opamp it's definitely upgrade time even though the manufacturer's specs are completely identical between the 2.

I'm still doing tons of reading, this thread is huge!

 

[ROBSCIX]

Did you order chip version or metal can opamps? Many prefer the metal can opamps for the ST/STX over the chip version of the same unit.
If you have any opamp questions post them.

 

[Criswell]

Oh crap I didn't even look into that, I'm barely on like page 14 of this thread so I'm way behind!

I ordered this chip LME49720 - Dual High Performance, High Fidelity Audio Operational Amplifier

And just order the 5 samples from the Sample page User Login

EDIT: 2nd link goes to User Login but it's just a link to order samples for the chip.

 

[drewfus420]

Just got my soundcard in today! I take lunch in about 40 minutes for a quick install/test. Also just ordered 5 of the LME49720 DIP8


Quote:

Originally Posted by ROBSCIX /img/forum/go_quote.gif Did you order chip version or metal can opamps? Many prefer the metal can opamps for the ST/STX over the chip version of the same unit.

sounds like he got the dip8

 

[ROBSCIX]

Quote:

Originally Posted by Criswell /img/forum/go_quote.gif Oh crap I didn't even look into that, I'm barely on like page 14 of this thread so I'm way behind! I ordered this chip LME49720 - Dual High Performance, High Fidelity Audio Operational Amplifier And just order the 5 samples from the Sample page User Login EDIT: 2nd link goes to User Login but it's just a link to order samples for the chip.

IIRC,

MA = SOIC8 needs an adapter for use on these cards
HA = Metal Can TO-99 version needs adapter for use on these cards.
NA = DIP8 will work out of the box with these soundcards.

Check and see which versions you ordered.

 

[Criswell]

My bad, for some reason the link just went to LME49720 page, I ordered the NA (DIP8)..

 

[ROBSCIX]

No those are fine. They are a good place to start if your new to opamps as they will pop right in. The other version woudl have needed adapters.

 

[Bojamijams]

I just have to restate, after spending days with this combo now, that this is truly a magical combo. I've never been happier or more impressed with this setup then I am right now.

I'd love to hear a combo even under a $1,000 that could match this, let alone for under $500 which is what this is. ( STX with the opamps + Audioengine A5s)

 

[ROBSCIX]

Will have to try out that combo...