jadi jpJADIS Lambalı Amplifikatör,amplifikatör,amfi,anfi,preamplifier,preamplifikatör,preamfi,amp,preamp,sesamfisi,dac,piakpamfisi,tubeamfi,audioampThe best tubes have always been Telefunkens. Mine has all Telefunken 803S. Also agree you should avoid any mods to Jadis equipment. Had one done on the JP-200