[Blorton]

Let's see if this pic works. If you look down at the board level near the tubes, there are a pair of 1" circuit boards with little discrete components on them. That's the Sparkos.

 

[ManiacSmile]

Well, I still have my old one around. I had considered moving these Sparkos to that one to see how that sounds and getting the even fancier ones for this new variation.

However - just as a sanity check, I spent a lot of time looking at the differences between the two boards when I got this new one. You can see it's very similar, just the channels have been moved around.

So for you and anyone else reading this - Sparkos SS3601 are not plug-and-play with the older version of RKV MKII. I am just getting hum in both channels. I reached out to Sparkos directly to see if he has ideas on retrofitting, but sadly will likely just return the op apms.

 

[Blorton]

So for you and anyone else reading this - Sparkos SS3601 are not plug-and-play with the older version of RKV MKII. I am just getting hum in both channels. I reached out to Sparkos directly to see if he has ideas on retrofitting, but sadly will likely just return the op apms.

That sucks! I just got the 2590's in and was planning to try shifting things around. Sorry to hear it didn't work on yours.