Hi I have had three sets of the Model Nines over the years. I am currently repairing a power supply which has lower voltage output than the other can. Both panels woofers and tweeters work so its just one can that needs work at the moment. I have run these with a Julius Futterman H3a (not the NYAL variety),Marantz 9's, Accuphase SS amps. The Futterman is still working by the way, (it makes me think of all those who say it wasn't built to last). These are VERY musical transducers. I have David Janszens zA2.1 & I like them very much as well.