Hafler DH-110 better than receiver preamp???

I am currently using an Integra DTR-7 as a pre-pro in a mid-fi system but had the chance to pick up an old Hafler DH-110 preamp on the cheap....my first separate preamp. I haven't received the preamp yet but was wondering if I should expect a noticable difference or maybe just a subtle difference?? Anyone want to venture an opinion??? Thanks!