I have two Squier Jazz Frankenbasses I purchased off of eBay. The four string is a Squier body, which the seller changed out the pickups to passive EMG Selects. The five string is a Squier affinity, with changes as described by eBay seller: "Pots were upgraded to full size Alpha pots and a Sprague "orange drop" .050 mfd tone cap was installed, so the electronics are equivalent to US built J basses." The five string is noticeably quieter than the four string. The tone isn't as quite as nice, for my money, but it's OK. What I'm wondering is if those pots and cap are making the difference, or if its because of the stock Squier pickups vs the EMG Select. I really do like the sound of the four string, and would like to make the five string closer in volume, so I can use the same settings when I switch onstage. I could use some help on this, as I have never done much with electronics on any instruments I have owned. Here is a photo of both instruments. The sellers did all the conversions to make them look like Fenders.