asus stxII with sparkos discrete opamps

I have found plenty of posts comparing sparkos against burson audio opamps, but nothing concerning muses vs sparkos.

What is your opinion of the muse opamp, it is expensive but is it audiophool expensive, or genuinely high performance.

Usually when i upgrade components, if the new component is better i can hear it straight away, so am not a big fan of the burn in theory.
Might be something to it, or maybe not. What do you think

Both the Sparkos and the Burson op amps are very demanding on the power supply.  The newest Burson are less demanding, but still require a good amount of capacitance around them and good strong and smooth voltage from main power supply.  This is something that the computer PS just cannot provide.  I'm not sure why so many people think that Bursons sound good on this card -- maybe a placebo affect??  Without a good power supply and closely mounted larger size capacitors, these discrete Class A op amps can sound bright/thin.

I once tried one of the MUSE op amps and the sound was very full, but a bit dull on the high frequencies. (can't remember if it was MUSE01 or MUSE02)  I attributed this to the very slow slew rate.  It may work out in some situations, but not others.

The best op amp I would recommend for a card like that are the single channel OPA827 SMD opamps mounted on a "single-to-dual" adapter.  Cimarron Technologies will sell these with the op amps already mounted/soldered onto the adapter for $33.50 each.  Just make sure you choose the "Pins are installed" option.

https://www.cimarrontechnology.com/browndog-020302-single-to-dual-op-amp-adapter

You can have him install other op amps onto the adapter, but I have found the OPA827 is the best compromise of resolution and FET sonic signature.  These monolithic op amps are also not as demanding on the power supply and work well on many platforms.

As far as burn in, yes, any electronic component will require a level of burn in.

Thanks!What do you think of analogue devices, is one of their opamps suitable.

I have tried the AD787BRZ op amps (including soldering a 50pf compensation cap across pins 6 & 8 of the op amp - which was challenging).  At first I thought this was one of the most cleanest and transparent op amps without adding any coloration.  However, after extensive listening, I found they sounded just a bit dull and actually a tiny bit dirty.

I have not tried any other AD op amps (such as AD8610).  Those other op amps have a max power supply voltage of +/-13V or lower.  The equipment I test in has a +/-15V power supply, so I can't test these other op amps.

Thanks!
Do you know of any opamp which is sharp sounding. On the asus soundcard there is a lack of treble which may be because of the muse opamps and their slow slew rate as you rightly mentioned.Is it possible to replace the muses with a different opamp which may overcome this lack of treble problem, something which is a more sharper sound