Just forget about the NOS dacs with ancient chips. Any number of the current generation dacs under 500 sound much better than even the old spendy stuff. Btw, I used to own these TDA 1543 dacs a long time ago. Better ones than the dubious Chinese stuff off Ebay. A Musical Fidelity V90 or the Pro-ject dac box S2 would be infinitely better in the budget category.