Sean's advice should be taken. I've had similar experiences and I believe Albert Porter has as well. In fact if I remember correctly, after Albert "upgraded" his wire and his speakers sounded terrible he went back to the amnufacturer (or sent his speakers in). To his suprise, they did not change his upgraded wire, but rather changed the capacitors so that the voicing was back to where it was. The resistance and capacitance of the wire is part of the voicing (whether it was in the design, or just a product of whatever wire was used). You will change the sound, and possibly not for the better (so save the old wire just in case).
Internal Speaker Rewiring
I have a pair of PSB Status Goldi's that sound surprisingly very good. Better than some other speakers I've heard at twice and thrice the price. In an effort to make them sound even better, I'd like to give a go at replacing all the internal wiring. Can anyone suggest the best wire to use and the best solder for making the connections? Obliged for help.