I have two spectors one is a Euro 5 and the other is a Euro 4 The Euro 5 I got brand new, it has the Aguliar OBP-1 my Euro 4 was bought used and had the older EMG pre amp.I replaced the EMG pre amp with a OBP-1 and have noticed that it has a much more tinny and bright sound then my Euro 5. My Euro 5 has a really nice deep sound and seems to resonate a lot better. I spoke to PJ at spector and he said the fact my 4 is 34" scale and my 5 is 35" makes a little bit of difference but the biggest difference is the pups. the Euro 4 has EMG P/J and my euro 5 has EMG 40dcs. He said to get the tone close as possible to my euro I should use only the P pickup and turn down the J pick up. Will this make a difference? I'm thinking about replacing the P/J pups with 35Dc's (4 string version of the 40DC) but as you can imagine that's going to be some work because they will have to re route for the 35 Dc's. Do you think this is worth doing since it's such a big task? I'm afraid if I get the 35dc's installed the routing will effect the tone as well. Any suggestions?