My experience is on the much lower end here than most people, but in a setup that's basically all NAD gear and a pair of Wharfedale 8.3 speakers I notice a difference in biwiring... I'm just not sure it's positive, negative, or simply different. Half of my reason for going biwire was the pathetic thin plate jumpers that bridged the HF/LF terminals.
Given that the speakers were designed with biwire terminals I have been using them for a while without much questioning. I plan to experiment with some quality jumpers.
Most of my assesments end up as "inconclusive" due to the fact that I'm still a college student... Just when I think I have speaker positioning and system tweaks nailed, one of the following happens...
- The female I live with rearranges the room or decides that my speakers are in an unacceptable location (or that they have to be positioned "neatly" - i.e. flat up against a wall/corner or similar nightmare)
- I have 4 aerospace exams in 3 days and end up forgetting what my system sounded like before I let it idle during finals week.
- It's time to go home and all my room specific tweaks are negated when I take my stereo home for break/vacation.