Hey guys, I recently did some electronics work for a friend in his Ibanez RG350. He wanted a Dimarzio evolution put in so I did it, following ibanez and dimarzio's respective wiring diagrams I removed the old INF-4 pickup, red from switch space 1 white from switch space 6 and bare from ground. I then put the Dimarzio Evolution in as suggested by dimarzio for the 4 wire conductor, red to hot position in this case switch space 1 white + black to the old white position switch space 6 and green + bare to ground. Having done this we plugged it in and it seemed fine but now he is complaining of the evolution sounding very bright and tinny compared to the INF-3 in the neck. Also when he tries to sweep the notes get all muddy and lost (and no this is not due to him playing bad ). Tapping also results in unstaisfied preformance as according to him the output is weak and he has to tap twice as hard to get the same output as the inf pickups. And finally he says theres about 50% less sustain coming from it. Some people I have talked to have suggested it may be out of phase though I don't think it sounds characteristic of a phase shift from what I heard and seeing as how I have followed the diagrams I don't know what to suggest to him, so I'm coming to you guys to bail me out If it were my guitar I'd tinker with it until I got right it but I don't have it in hand and don't want to ruin it so any ideas what the problem may be?
Thanks for your help.
PS: here are the diagrams from Ibanez and Dimarzio
Ibanez:
Dimarzio: