A friend of mine bought a bass that had seymour duncan pickups and a 2 band emg onboard preamp. The bass sounded awesome and he wanted to have another one that sounded exactly the same. So then he got a used bass and threw the same model of pickups but paying another 100 bucks for the preamp seemed like an exageration for him. At the end he looked on ebay and found many chinese 2 band preamps for 20 bucks. They are cool because they are prewired and the preamp itself comes in a sealed black box like the aguilar ones. Well after setting everything up I have to say that both basses DO sound the same, they both have the same frequencies for bass and treble (40hz and 4k). After all when I see all the super expensive onboard preamps that costs more than a hundred I always wonder: people paying just for the name?