Listening to that Stravinsky Firebird album through the Pro-Ject NRS box after comparing a couple of raw vs NRS-processed vs Nando's Sugar Cube processed cuts from the Bangla Desh Concert album and I have to say, I'm impressed. Yes, the NRS plays nice with a signal from the Tascam converter. It may be time to hit the switches in the dbx 200 with some Deoxit and see if that helps...
I'd still like to play with a Sugar Cube in real time, but I'm hearing maybe 75% of what a Sugar Cube can do, based on the Bangla Desh album cuts. For 20 - 25% of the price of a Sugar Cube, it's as advertised. You still can't go crazy buying the 50-cent albums and thinkng they'll sound like new, but for any record graded Good to VG or above, it makes a nice difference. Since I don't go dumpster diving, this will keep me until a Sugar Cube comes along.
This technology is as advertised. Nicely done, Pro-Ject.