Inter_Voice said:
... I therefore suggest to use the same amount of money and buy a better quality twin-wired cable. However it is worthwhile to change the solid bridging plate at the back of your speaker with a good quality bridging wire.
This is the advice I've been given several times in shops. Bi-wiring seems to have gone out of fashion. 20 or so years ago, I managed to damage the tweeters in my SL6s (they turned black!) so I had them replaced by Celestion who also offered to split the X-over & fit a 2nd pair of terminals. As the extra cost was low, I thought What the Hell - I try bi-wiring that I was somewhat skeptical of. I bought a 2nd run of 2x 5m of Exposure cable (I cannot remember if I tried something else 1st) & was very surprised by the improvement in imaging. It was a big difference!
I've run my current bi-wire-able Totem Arros both bi-wired (with the same Exposure cable) & single wired. I've also single wired with some Naim solid core loosely twisted stuff lent to me. The single wiring was done with the supplied bridges. I also have use of an old Restek Challenger amplifier that images better than my own Primare i21. I have gone back & forth between the cables & wiring. The 2x7 (or so) metres of Naim solid core sound better than a single run of Exposure but the image, focus & depth opens up noticeably with bi-wiring. I also bought 16 good quality hollow-pin 4mm plugs that allow for the Exposure's rather thick wire. RS Ltd sell 4mm female to spade connectors that go under either amp's speaker terminals.
I haven't tried single wiring with cables rather than the bridges as some manufacturers now do. I think the answer is that your mileage may vary. It probably depends on the speakers, cables & whether or not imaging is important or not (I have friends who give little thought to its importance). I would advise anyone sufficiently interested to borrow suitable cable or just buy some fairly cheap stuff from somewhere like Maplin.