Hi Rodulfo, I have a pair of JBL 4312A’s on Sound Anchor stands . They are currently in the closet as I went to low power tubes . Your speakers need 100 plus wpc tube or 200 wpc SS . I’ve run these along with my long gone Century 100’s using Dynaco MKIII’s ( 60 wpc ) , ASL 30 wpc ( El 34’s) Sansui 9090db, Bryston 4BSST, Yamaha RX-V, Modwright KWI-200. So with tubes , 30 wpc was too little and 60 was just starting to cut it . The Yamaha was 105 wpc ( but home theater stuff ) so not good. The Modwright had good control , but was dry . The Bryston was great ( so maybe the Hafler would be nice) . I contacted Quicksilver and they recommended their 120 wpc amps . Most people underestimate how much power the JBL’s need . Also too little power leads to clipping damage . I would go with SS for simplicity, but it might be too dry for your taste. This is a good speaker for a tube pre and a SS amp , or a big tube amp. I’m actually considering the Latino 120 wpc Monos . FWIT many people bi-amp the big JBL’s with tubes on top and SS for the woofers ( sometimes class D). But that’s a whole different beast , but due to the large power requirements. Many of us are willing to deal with the hassle of tubes because the result can be stunning with vintage JBL’s . BTW I also have Klipsch Heresys, but prefer the JBL’s . Happy Hunting, Mike.
