Modding the PS Audio Directstream DAC MK1 and MK2

Any updates on the 8139 opamp modification WRT availablity and cost? Understood this is a send in your board modification. You have already performed the Vocm cap and nickel xformer mods. So pleased with this modded MK1, but if the 8139 opamps can provide further performance I’m interested. I suspect this mod will be an improvement, just not as night and day as the Vocm cap and nickle transformer mod, eh? 

Would enjoy hearing your opinion on Massive final.  I hear a major improvement.  

I’m kind of on the fence.

Using a preamp, we feel Firmware fpga1_208_Antero or the first fpga1 228 Massive sound better. The new fpga1 233 Massive is clearer and can have more detail and a larger stage however for us just doesn’t sound as "real". Just a little thin sounding for our taste. String instruments have lost their body and texture.

We of coarse did instant A/B listening test in our evaluation.

The UI update is great as now we can turn off the power to the WiFi chip inside the unit. The sample-rate screen is also welcoming.

Interesting post:

 @jk_richards Are the APS transformers for MK1 and MK2 wired differently? Ted is saying the MK1 and MK2 are different but it's interesting that they can both use the same Edcor xs4400 transformers.