This is embarrassing - it just occurred to me that I -do- need a couple of RCA to banana cables.

I have had an old cheapo integrated amp sitting around for about 40 years (since I worked part-time in the camera/audio department at Woolco) which actually sounded pretty good, but I haven't gotten around to hooking it up because it has RCA jacks on the back for the speaker outputs.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8