These guys offer significant(and reasonably priced) upgrades, for the DH-110, should you desire. ie: http://www.musicaldesign.com/MC_Haf_premod.html Just FYI: With the 110; an MC phono stage was optional(something to ask a seller about, if a concern). The Hafler is fully discrete(no op-amps in signal path). The later productions(black pebble finish/Rockford) had gold-plated RCAs, metal-film resistors and went to Polypropylene capacitors, from Polystyrene(desirable changes).