There are these I've been tempted to try out that use the same chip (and a low noise pre amp), but unfortunately I have two perfectly functioning amplifiers alr

There are these I've been tempted to try out that use the same chip (and a low noise pre amp), but unfortunately I have two perfectly functioning amplifiers already :-) (and a set of powered edifier speakers in the mail - I have a problem). https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1312.R1.TR0.TRC0.A0.H0.XTPA3251.TRS2&_nkw=TPA3250+amp&_sacat=0 https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m... They have a switch mode power supply instead of the toroidal in the IEEE article, so in theory more noise - in real life? probably doesn't matter. THD < 0.01% at 30W, frequency response is +- 1db, the days of having to spend any money for an amp seem gone, < $70