You need the most watts you can (Maggies like power) get but luckily current does not matter so amp need not be huge and heavy. I found Carver m4.0t amp did quite well. Carver amps in general should provide great value for running Maggies if in good operating condition still. For something newer I’d look to some thing like Class D Audio amps perhaps. Or if higher SPL not needed a 60-80 watt tube amp like say Rogue is reasonably affordable and will also work well but with more limited SPL .